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1. GC Insights: Identifying conditions that sculpted bedforms – human insights to building an effective AI (artificial intelligence)

Author: J. K. Hillier, C. Unsworth, L. De Clerk, and S. Savel'ev
Subjects: Geography. Anthropology. Recreation, Science
Abstract: Insights from a geoscience communication activity, verified using preliminary investigations with an artificial neural network, illustrate that observation of humans' abilities can help design an effective artificial intelligence or “AI”. Even given only one set of “training” examples, survey participants could visually recognize which flow conditions created bedforms (e.g. sand dunes and riverbed ripples) from their shapes, but an interpreter's geoscience expertise does not help. Together, these observations were interpreted as indicating that a machine learning algorithm might be trained successfully from limited data, particularly if it is “helped” by pre-processing bedforms into a simple shape familiar from childhood play.
Published: 2022
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2. Shape coexistence and mixing of low-lying 0+ states in 96Sr

Author: S. Cruz, P.C. Bender, R. Krücken, K. Wimmer, F. Ames, C. Andreoiu, R.A.E. Austin, C.S. Bancroft, R. Braid, T. Bruhn, W.N. Catford, A. Cheeseman, A. Chester, D.S. Cross, C.Aa. Diget, T. Drake, A.B. Garnsworthy, G. Hackman, R. Kanungo, A. Knapton, W. Korten, K. Kuhn, J. Lassen, R. Laxdal, M. Marchetto, A. Matta, D. Miller, M. Moukaddam, N.A. Orr, N. Sachmpazidi, A. Sanetullaev, C.E. Svensson, N. Terpstra, C. Unsworth, and P.J. Voss
Subjects: Physics, QC1-999
Abstract: The low energy excited 02,3+ states in 96Sr are amongst the most prominent examples of shape coexistence across the nuclear landscape. In this work, the neutron [2s1/2]2 content of the 01,2,3+ states in 96Sr was determined by means of the d(95Sr, p) transfer reaction at the TRIUMF-ISAC2 facility using the SHARC and TIGRESS arrays. Spectroscopic factors of 0.19(3) and 0.22(3) were extracted for the 96Sr ground and 1229 keV 0+ states, respectively, by fitting the experimental angular distributions to DWBA reaction model calculations. A detailed analysis of the γ-decay of the isomeric 03+ state was used to determine a spectroscopic factor of 0.33(13). The experimental results are compared to shell model calculations, which predict negligible spectroscopic strength for the excited 0+ states in 96Sr. The strengths of the excited 02,3+ states were also analyzed within a two-level mixing model and are consistent with a mixing strength of a2=0.40(14) and a difference in intrinsic deformations of |Δβ|=0.31(3). These results suggest coexistence of three different configurations in 96Sr and strong shape mixing of the two excited 0+ states. Keywords: Single-particle structure, Transfer reaction, Shape coexistence
Published: 2018
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3. Shell evolution approaching the N=20 island of inversion: Structure of 26Na

Author: G.L. Wilson, W.N. Catford, N.A. Orr, C.Aa. Diget, A. Matta, G. Hackman, S.J. Williams, I.C. Celik, N.L. Achouri, H. Al Falou, R. Ashley, R.A.E. Austin, G.C. Ball, J.C. Blackmon, A.J. Boston, H.C. Boston, S.M. Brown, D.S. Cross, M. Djongolov, T.E. Drake, U. Hager, S.P. Fox, B.R. Fulton, N. Galinski, A.B. Garnsworthy, D. Jamieson, R. Kanungo, K.G. Leach, J.N. Orce, C.J. Pearson, M. Porter-Peden, F. Sarazin, E.C. Simpson, S. Sjue, D. Smalley, C. Sumithrarachchi, S. Triambak, C. Unsworth, and R. Wadsworth
Subjects: 81V35, Nuclear structure, 26Na, γ-Ray transitions, Transfer reactions, Shell migration, Physics, QC1-999
Abstract: The levels in 26Na with single particle character have been observed for the first time using the d(25Na, pγ) reaction at 5 MeV/nucleon. The measured excitation energies and the deduced spectroscopic factors are in good overall agreement with (0+1)ħω shell model calculations performed in a complete spsdfp basis and incorporating a reduction in the N=20 gap. Notably, the 1p3/2 neutron configuration was found to play an enhanced role in the structure of the low-lying negative parity states in 26Na, compared to the isotone 28Al. Thus, the lowering of the 1p3/2 orbital relative to the 0f7/2 occurring in the neighbouring Z=10 and 12 nuclei – 25,27Ne and 27,29Mg – is seen also to occur at Z=11 and further strengthens the constraints on the modelling of the transition into the island of inversion.
Published: 2016
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4. Investigation of the role of 10Li resonances in the halo structure of 11Li through the Li11(p,d)Li10 transfer reaction

Author: A. Sanetullaev, R. Kanungo, J. Tanaka, M. Alcorta, C. Andreoiu, P. Bender, A.A. Chen, G. Christian, B. Davids, J. Fallis, J.P. Fortin, N. Galinski, A.T. Gallant, P.E. Garrett, G. Hackman, B. Hadinia, S. Ishimoto, M. Keefe, R. Krücken, J. Lighthall, E. McNeice, D. Miller, J. Purcell, J.S. Randhawa, T. Roger, A. Rojas, H. Savajols, A. Shotter, I. Tanihata, I.J. Thompson, C. Unsworth, P. Voss, and Z. Wang
Subjects: Physics, QC1-999
Abstract: The first measurement of the one-neutron transfer reaction 11Li(p,d)10Li performed using the IRIS facility at TRIUMF with a 5.7A MeV 11Li beam interacting with a solid H2 target is reported. The 10Li residue was populated strongly as a resonance peak with energy Er=0.62±0.04 MeV having a total width Γ=0.33±0.07 MeV. The angular distribution of this resonance is characterized by neutron occupying the 1p1/2 orbital. A DWBA analysis yields a spectroscopic factor of 0.67±0.12 for p1/2 removal strength from the ground state of 11Li to the region of the peak. Keywords: Halo nucleus, Li10,11, Transfer reaction, Inverse kinematics, DWBA, Spectroscopic factor
Published: 2016
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5. The Advanced Implantation Detector Array (AIDA)

Author: O. Hall, T. Davinson, C.J. Griffin, P.J. Woods, C. Appleton, C.G. Bruno, A. Estrade, D. Kahl, L. Sexton, I. Burrows, P.J. Coleman-Smith, M. Cordwell, A. Grant, M. Kogimtzis, M. Labiche, J. Lawson, I. Lazarus, P. Morall, V.F.E. Pucknell, J. Simpson, C. Unsworth, D. Braga, M. Prydderch, S.L. Thomas, L.J. Harkness-Brennan, P.J. Nolan, R.D. Page, and D. Seddon
Subjects: Nuclear and High Energy Physics, Instrumentation
Published: 2023
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6. First experimental measurements with the Segmented Inverted-coaxial GerMAnium (SIGMA) detector

Author: F.J. Pearce, L.J. Harkness-Brennan, A. Alharbi, A.J. Boston, O. Griffiths, F. Holloway, D.S. Judson, M. Labiche, P.J. Nolan, R.D. Page, D.C. Radford, E. Rintoul, J. Simpson, C. Unsworth, and J.P. Wright
Subjects: Nuclear and High Energy Physics, Instrumentation
Published: 2022

7. Discovering features in gravitational-wave data through detector characterization, citizen science and machine learning

Author: Kevin Crowston, O. Patane, R. R. Rote, Aggelos K. Katsaggelos, M. A.Lobato Rodriguez, S. B. Coughlin, S. Soni, W. F. Domainko, K. Kaminski, B. Téglás, Chengzhi Zhang, Mahboobeh Harandi, Carsten Østerlund, Laura Trouille, P. Nauta, U. Marciniak, C. Unsworth, V. G. Baranowski, Corey Brian Jackson, G. Niklasch, and Christopher P. L. Berry
Subjects: Physics, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Artificial neural network, 010308 nuclear & particles physics, Gravitational wave, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, LIGO, General Relativity and Quantum Cosmology, Glitch, Transient noise, 0103 physical sciences, State (computer science), Astrophysics - Instrumentation and Methods for Astrophysics, 010303 astronomy & astrophysics, Algorithm, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract: The observation of gravitational waves is hindered by the presence of transient noise (glitches). We study data from the third observing run of the Advanced LIGO detectors, and identify new glitch classes. Using training sets assembled by monitoring of the state of the detector, and by citizen-science volunteers, we update the Gravity Spy machine-learning algorithm for glitch classification. We find that a new glitch class linked to ground motion at the detector sites is especially prevalent, and identify two subclasses of this linked to different types of ground motion. Reclassification of data based on the updated model finds that 27 % of all transient noise at LIGO Livingston belongs to the new glitch class, making it the most frequent source of transient noise at that site. Our results demonstrate both how glitch classification can reveal potential improvements to gravitational-wave detectors, and how, given an appropriate framework, citizen-science volunteers may make discoveries in large data sets., 26 pages, 10 figures
Published: 2021

8. Experimental study of the nature of the 1− and 2− excited states in Be10 using the Be11(p,d) reaction in inverse kinematics

Author: K. Kuhn, A. B. Garnsworthy, Paul Thompson, S. T. Pittman, Corina Andreoiu, B. A. Brown, M. A. G. Alvarez, R. Braid, S. V. Ilyushkin, C. Unsworth, P. C. Bender, W. N. Catford, C. E. Svensson, A. DiPietro, V. Pesudo, J. Gómez-Camacho, Filomena Nunes, C. Aa. Diget, Enrique Nácher, F. Sarazin, D. W. Bardayan, J. C. Blackmon, Olof Tengblad, Ángel Perea, D. Smalley, T.E. Drake, Patrick O'Malley, P. Figuera, Z. M. Wang, U. Hager, G. Hackman, and M. J. G. Borge
Subjects: Physics, Inverse kinematics, 010308 nuclear & particles physics, State (functional analysis), 01 natural sciences, Deuterium, Excited state, 0103 physical sciences, Cluster (physics), Neutron, Halo, Atomic physics, 010306 general physics, Mixing (physics)
Abstract: The nature of the 1 − and 2 − excited states in Be 10 is studied using the Be 11 ( p , d ) transfer reaction in inverse kinematics at 10A MeV at TRIUMF ISAC-II, in particular to assess whether either of them can be considered as an excited halo state. The angular distributions for both states are extracted using deuteron- γ coincidences and analyzed using a transfer model taking into account one-step and two-step processes. A good fit of the angular distributions is obtained considering only the one-step process, whereby an inner p 3 / 2 neutron of Be 11 is removed, leaving the halo neutron intact. Higher-order processes however cannot be rejected. The small spectroscopic factors extracted suggest that the structure of both states is not uniquely halo-like, but rather display a more complex configuration mixing cluster and halo structures. Further insights are limited, as this experiment specifically probed the halo-like (but not cluster-like) Be 11 ( 1 / 2 + ) ⊗ ( ν p 3 / 2 ) − 1 configuration in both states.
Published: 2021
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9. Characterisation of a small electrode HPGe detector

Author: H. C. Boston, O.S. Thomas, J.P. Wright, C. Unsworth, Aderemi S. Adekola, J. Simpson, A. J. Boston, P. J. Nolan, J. Colaresi, D. S. Judson, L. J. Harkness-Brennan, and W. F. Mueller
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, 020502 materials, Detector, 02 engineering and technology, 01 natural sciences, Semiconductor detector, Optics, Planar, 0205 materials engineering, Electric field, 0103 physical sciences, Electrode, Electric potential, Coaxial, business, Instrumentation, Energy (signal processing)
Abstract: © 2019 Elsevier B.V. Small electrode HPGe detectors in an inverted coaxial geometry are increasingly in use in applications where both high efficiency and excellent energy resolution are required. The unusual electric field configuration of these detectors results in extremely long charge collection times compared to planar and coaxial devices. In this work we have characterised such a detector using gamma-ray coincidence measurements and optimised an electric field simulation to reproduce the positional variation of detector response. We show that, alongside accurate crystal geometry and applied electric potential, a temperature correction is crucial to correctly determining appropriate charge carrier mobility parameters. This work will help to guide the future development of HPGE detectors for applications including radioactive waste assay, radio-isotope dating, and fundamental nuclear physics.
Published: 2019
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10. The GRIFFIN facility for Decay-Spectroscopy studies at TRIUMF-ISAC

Author: Y. Linn, Mustafa Rajabali, D. Morris, Corina Andreoiu, C. Bartlett, S. W. Yates, E. T. Rand, K. Whitmore, R. Braid, D. S. Cross, D. Miller, J.E. Ash, T. Bruhn, M. Bowry, Erin E. Peters, James Smallcombe, A. B. Garnsworthy, S. Georges, F. A. Ali, D. Kisliuk, D. Brennan, G. Hackman, Elizabeth Padilla-Rodal, A.I. Kilic, R. Dunlop, E. MacConnachie, E. F. Zganjar, N. Bernier, S. Cruz, A.R. Mathews, E. McGee, J. Measures, M. Kuwabara, M. Ticu, E. Peters, V. Bildstein, C. Burbadge, R. Gudapati, P. C. Bender, R. Caballero-Folch, L.N. Morrison, B. Davids, Baharak Hadinia, R. Kokke, Panu Ruotsalainen, U. Rizwan, H. P. Patel, E. Timakova, B. Jigmeddorj, S. S. Bhattacharjee, S. Ciccone, K. G. Leach, Jack Henderson, M. R. Dunlop, F. H. Garcia, R Umashankar, W. J. Mills, W. Moore, Joochun Park, J. K. Smith, D. Southall, A. T. Laffoley, A. Cheeseman, Z. Beadle, P. E. Garrett, Z. M. Wang, M. Moukaddam, L. J. Evitts, C.R. Natzke, C. Lim, B. Olaizola, T. Ballast, K. Ortner, F. Sarazin, P. Boubel, H. Bidaman, R. Churchman, J. R. Leslie, S. A. Gillespie, C. E. Svensson, K. Kuhn, S. Wong, T. Zidar, B. Shaw, W.H. Ashfield, R. Krücken, Iris Dillmann, J. Turko, O. Paetkau, S. V. Ilyushkin, R. Lafleur, S. Hallam, G. C. Ball, D. Bishop, C. Unsworth, K. Raymond, A. Diaz Varela, J. L. Pore, Y. Saito, C. J. Pearson, A. J. Radich, K. Starosta, A. D. MacLean, and Aaron Chester
Subjects: Radioactive ion beams, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, chemistry.chemical_element, Germanium, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Spectroscopy, Instrumentation, Digital data acquisition system, Physics, Spectrometer, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), Semiconductor detector, chemistry, Physics::Accelerator Physics
Abstract: Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei, GRIFFIN, is a new high-efficiency γ -ray spectrometer designed for use in decay spectroscopy experiments with low-energy radioactive ion beams provided by TRIUMF’s Isotope Separator and Accelerator (ISAC-I) facility. GRIFFIN is composed of sixteen Compton-suppressed large-volume clover-type high-purity germanium (HPGe) γ -ray detectors combined with a suite of ancillary detection systems and coupled to a custom digital data acquisition system. The infrastructure and detectors of the spectrometer as well as the performance characteristics and the analysis techniques applied to the experimental data are described.
Published: 2019
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11. Simulation and validation of a planar HPGe detector signal database for use in pulse shape analysis

Author: E. Rintoul, A.J. Boston, H.C. Boston, A. Caffrey, L.J. Harkness-Brennan, D.S. Judson, P.J. Nolan, J. Platt, C. Unsworth, J.P. Wright, T.F. Woodroof, and P. Quirin
Subjects: Nuclear and High Energy Physics, Instrumentation
Published: 2022
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12. Characterisation of the charge collection properties in a segmented planar HPGe detector

Author: E. Rintoul, L. J. Harkness-Brennan, J.R. Cresswell, D. S. Judson, J. Simpson, J. F. C. Cocks, P. Quirin, J. Platt, A. Caffrey, A. J. Boston, H. C. Boston, C. Unsworth, B. Pirard, P. J. Nolan, T.F. Woodroof, I.H. Lazarus, and D. Walker
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, chemistry.chemical_element, Germanium, Signal, Collimated light, Semiconductor detector, Planar, Optics, chemistry, Position (vector), Rise time, High Energy Physics::Experiment, business, Instrumentation
Abstract: Segmented germanium semiconductor detectors provide excellent γ -ray spectroscopic information whilst also being sensitive to the position of interactions within their active volume. Understanding the detector response to γ -ray interactions throughout its volume is required for interpreting the signal output. This work is the first assessment of the response and charge collection properties of an electrically-cooled Mirion Technologies-manufactured planar HPGe detector with boron implanted p + and amorphous germanium based n + strip contacts. The signal response of the detector as a function of γ -ray interaction position has been characterised by performing collimated beam scans with 59.5 keV and 661.7 keV γ -rays. A database of average signals, generated through the detector volume and across the detector surfaces, has been produced. A map of parameterised rise time response through depth has been generated and used to apply pulse shape analysis techniques, improving the position resolution within the detector.
Published: 2021

13. Single-particle structure in neutron-rich Sr isotopes approaching the $N=60$ shape transition

Author: T.E. Drake, P. C. Bender, Kathrin Wimmer, A. Matta, M. Marchetto, A. B. Garnsworthy, C. E. Svensson, Friedhelm Ames, G. Hackman, Aaron Chester, T. Bruhn, P. Voss, S. S. Bhattacharjee, R. Krücken, A. Knapton, David Miller, K. Kuhn, C. Unsworth, C. Aa. Diget, S. Cruz, N. A. Orr, A. Cheeseman, D. S. Cross, R. Kanungo, Jens Lassen, R. A. E. Austin, Corina Andreoiu, M. Moukaddam, C.S. Bancroft, N. Sachmpazidi, Alisher Sanetullaev, W. Korten, R. Braid, N. Terpstra, Robert Laxdal, W. N. Catford, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Science and Technology Facilities Council (UK), National Science Foundation (US), Natural Sciences and Engineering Research Council of Canada, British Columbia Knowledge Development Fund, and Ministerio de Economía y Competitividad (España)
Subjects: Physics, 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Quantum number, Nuclear Structure, 7. Clean energy, 01 natural sciences, Charged particle, 3. Good health, 13. Climate action, Excited state, Neutron number, 0103 physical sciences, Neutron, Nuclear Experiment (nucl-ex), Born approximation, Atomic physics, 010306 general physics, Ground state, Spin (physics), Nuclear Experiment
Abstract: 12 pags., 16 figs., 2 tabs., Background: Neutron-rich nuclei around neutron number N=60 show a dramatic shape transition from spherical ground states to prolate deformation in Sr98 and heavier nuclei. Purpose: The purpose of this study is to investigate the single-particle structure approaching the shape transitional region. Method: The level structures of neutron-rich Sr93,94,95 were studied via the H2(Sr94,95,96,t) one-neutron stripping reactions at TRIUMF using a beam energy of 5.5 AMeV. γ-rays emitted from excited states and recoiling charged particles were detected by using the TIGRESS and SHARC arrays, respectively. States were identified by gating on the excitation energy and, if possible, the coincident γ radiation.Results: Triton angular distributions for the reactions populating states in ejectile nuclei Sr93,94,95 were compared with distorted wave Born approximation calculations to assign and revise spin and parity quantum numbers and extract spectroscopic factors. The results were compared with shell-model calculations and the reverse (d,p) reactions and good agreement was obtained. Conclusions: The results for the H2(Sr94,t)Sr93 and H2(Sr95,t)Sr94 reactions are in good agreement with shell-model calculations. A two-level mixing analysis for the 0+ states in Sr94 suggest strong mixing of two shapes. For the H2(Sr96,t)Sr95 reaction the agreement with the shell-model is less good. The configuration of the ground state of Sr96 is already more complex than predicted, and therefore indications for the shape transition can already be observed before N=60., We acknowledge support from the Science and Technologies Facility Council (UK, Grants No. EP/D060575/1 and No. ST/L005727/1), the National Science Foundation (US, Grant No. PHY-1306297), the Natural Sciences and Engineering Research Council of Canada, the Canada Foundation for Innovation and the British Columbia Knowledge and Development Fund. TRIUMF receives federal funding via a contribution through the National Research Council Canada. K.W. acknowledges the support from the Spanish Ministerio de Economía, Industria y Competitividad, Gobierno de España RYC-2017-22007.
Published: 2020
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14. Position resolution simulations for the inverted-coaxial germanium detector, SIGMA

Author: D. C. Radford, D. S. Judson, M. Labiche, C. Unsworth, J.P. Wright, F. Pearce, L. J. Harkness-Brennan, R. D. Page, P. J. Nolan, J. Simpson, and A. J. Boston
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, 020502 materials, Detector, chemistry.chemical_element, Germanium, Ranging, 02 engineering and technology, 01 natural sciences, Semiconductor detector, Full width at half maximum, Optics, 0205 materials engineering, chemistry, Position (vector), 0103 physical sciences, High Energy Physics::Experiment, Coaxial, Spectroscopy, business, Instrumentation
Abstract: The SIGMA Germanium detector has the potential to revolutionise γ -ray spectroscopy, providing superior energy and position resolving capabilities compared with current large volume state-of-the-art Germanium detectors. The theoretical position resolution of the detector as a function of γ -ray interaction position has been studied using simulated detector signals. A study of the effects of RMS noise at various energies has been presented with the position resolution ranging from 0.33 mm FWHM at E γ = 1 MeV , to 0.41 mm at E γ = 150 keV. An additional investigation into the effects pulse alignment have on pulse shape analysis and in turn, position resolution has been performed. The theoretical performance of SIGMA operating in an experimental setting is presented for use as a standalone detector and as part of an ancillary system.
Published: 2018
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15. Gamma-ray imaging performance of the GRI+ Compton camera

Author: L. J. Harkness-Brennan, A. Caffrey, J. Simpson, C. Reid, H. C. Boston, O. Griffiths, E. Rintoul, A. J. Boston, B. Le Crom, D. S. Judson, P. J. Nolan, T.F. Woodroof, S. Kalantan, A. Powell, I.H. Lazarus, K.D. Atkinson, C. Unsworth, H. Alshammari, G. Randall, I. Burrows, and J. Platt
Subjects: Physics, Optics, business.industry, Gamma ray, Compton camera, business, Instrumentation, Mathematical Physics
Abstract: GRI+ (Gamma-Ray Imager) is a cart-based Compton camera developed at the University of Liverpool. The system comprises three electrically-cooled semiconductor detectors; two planar double-sided strip detectors (Si(Li) and HPGe) and an HPGe coaxial detector. The mobile cart houses the necessary components for data acquisition and analysis, providing complete functionality for imaging gamma-ray sources in an industrial setting. This paper reports on the operation of the system and the methods used to improve intrinsic system performance. The processing chain for extracting information pertaining to gamma-ray interactions has been developed and the imaging performance is characterised using an analytical reconstruction code. The obtainable Angular Resolution Measure (ARM) from a Cs-137 point source placed 10.5 cm from the front of the Si(Li) cryostat was determined to be 4.12∘ after the application of data processing techniques. The system energy resolution, which is key to isotope identification and image quality, was calculated to be less than 0.5% at 1332.5 keV.
Published: 2021
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16. Implementation of the Doppler shift attenuation method using TIP/TIGRESS at TRIUMF: Fusion-evaporation lifetime measurements in 22 Ne

Author: T. Ballast, G. Hackman, D. Miller, G. C. Ball, P. Voss, U. Rizwan, J. Williams, A. B. Garnsworthy, B. Jigmeddorj, Alejandra Diaz Varela, W. J. Mills, Z. Wang, M. Moukaddam, Corina Andreoiu, D. S. Cross, M. M. Rajabali, T.E. Drake, V. Bildstein, R. Henderson, P. C. Bender, Baharak Hadinia, C. Unsworth, T. Domingo, D. S. Jamieson, R. Kruecken, P. E. Garrett, R. Ashley, Aaron Chester, K. Starosta, A. Knapton, J. Wong, C. Bolton, and C. E. Svensson
Subjects: Physics, Nuclear and High Energy Physics, Fusion, 010308 nuclear & particles physics, Attenuation, Monte Carlo method, Evaporation, 01 natural sciences, Nuclear physics, symbols.namesake, 0103 physical sciences, symbols, Particle, Gamma spectroscopy, 010306 general physics, National laboratory, Instrumentation, Doppler effect
Abstract: A method is presented for the determination of gamma-ray energies and transition rates in nuclei populated using the fusion-evaporation reaction mechanism and measured using the Doppler-shift attenuation method (DSAM). This method is applied to data collected for the stable benchmark nucleus 22Ne during a commissioning experiment at TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, employing a 12C(18O,2α)22Ne fusion-evaporation reaction. Gamma-ray energies were determined using offline reconstruction to correct for the Doppler shift. Mean lifetimes of the corresponding transitions were then measured via a comparison to Monte-Carlo lineshape simulations developed using the GEANT4 framework. Best fit lifetimes obtained using χ2 analysis were in general agreement with the existing literature, validating the analysis method used.
Published: 2017
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17. Single-particle structure of neutron-rich Sr isotopes via H2(Sr94,95,96, p) reactions

Author: Friedhelm Ames, Corina Andreoiu, N. Sachmpazidi, R. Kanungo, A. B. Garnsworthy, W. Korten, C. E. Svensson, C.S. Bancroft, T.E. Drake, Aaron Chester, P. Voss, R. Braid, P. C. Bender, N. Terpstra, Alisher Sanetullaev, Rae Austin, M. Marchetto, C. Unsworth, Kathrin Wimmer, D.W. Miller, A. Knapton, Robert Laxdal, André Palma da Cunha Matta, A. Cheeseman, N. A. Orr, W. N. Catford, R. Krücken, C. Aa. Diget, G. Hackman, M. Moukaddam, K. Kuhn, T. Bruhn, S. Cruz, D. S. Cross, and J. Lassen
Subjects: Physics, Spins, 010308 nuclear & particles physics, Nuclear structure, 01 natural sciences, Charged particle, Neutron number, Excited state, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Spin (physics), Ground state
Abstract: Background: The region around neutron number N=60 in the neutron-rich Sr and Zr nuclei is one of the most dramatic examples of a ground-state shape transition from (near) spherical below N=60 to strongly deformed shapes in the heavier isotopes. Purpose: The single-particle structure of Sr95-97 approaching the ground-state shape transition at Sr98 has been investigated via single-neutron transfer reactions using the (d,p) reaction in inverse kinematics. These reactions selectively populate states with a large overlap of the projectile ground state coupled to a neutron in a single-particle orbital. Method: Radioactive Sr94,95,96 nuclei with energies of 5.5 AMeV were used to bombard a CD2, where D denotes H2, target. Recoiling light charged particles and γ rays were detected using a quasi-4π silicon strip detector array and a 12-element Ge array. The excitation energy of states populated was reconstructed employing the missing mass method combined with γ-ray tagging and differential cross sections for final states were extracted. Results: A reaction model analysis of the angular distributions allowed for firm spin assignments to be made for the low-lying 352, 556, and 681 keV excited states in Sr95 and a constraint has been placed on the spin of the higher-lying 1666 keV state. Angular distributions have been extracted for ten states populated in the H2(Sr95,p)Sr96 reaction, and constraints have been provided for the spins and parities of several final states. Additionally, the 0, 167, and 522 keV states in Sr97 were populated through the H2(Sr96,p) reaction. Spectroscopic factors for all three reactions were extracted. Conclusions: Results are compared to shell-model calculations in several model spaces and the structure of low-lying states in Sr94 and Sr95 is well described. The spectroscopic strength of the 0+ and 2+ states in Sr96 is significantly more fragmented than predicted. The spectroscopic factors for the H2(Sr96,p)Sr97 reaction suggest that the two lowest-lying excited states have significant overlap with the weakly deformed ground state of Sr96, but the ground state of Sr97 has a different structure.
Published: 2019
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18. A semiconductor triple-layered Compton camera for Proton Therapy verification

Author: D. S. Judson, A. Newport, A. J. Boston, L. J. Harkness-Brennan, S. Kalantan, C. Unsworth, P. J. Nolan, A. Caffery, E. Rintoul, H. Alshammari, and J. Platt
Subjects: Physics, Optics, Semiconductor, Proton, Point source, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Detector, Gamma ray, business, Proton therapy, Energy (signal processing)
Abstract: Measurement of prompt gamma-rays emitted during proton therapy is a promising technique for dosimetric and geometric verification of the treatment. The Compton camera developed at the University of Liverpool provides a superior alternative to the existing imaging modalities. Its suitability for the measurement of a high energy gamma-ray point source is investigated through the use of Monte Carlo simulation. The imaging efficiency was estimated to be 9.86×10−5 for 1836 keV gamma-rays from 88Y placed at 10 cm from the front of first detector. Given the observed gamma-ray flux, the Compton camera is feasible for the measurement of prompt gamma emission during proton therapy.
Published: 2019
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19. Properties of concrete made of multicomponent mixes of low-energy demanding binders

Author: M. Mavroulidou, M.J. Gunn, C. Unsworth, and T. Morrison
Subjects: Cement, Materials science, Building and Construction, law.invention, Portland cement, Compressive strength, Properties of concrete, Flexural strength, Pulverised fuel ash, law, Ultimate tensile strength, General Materials Science, Composite material, Metakaolin, Civil and Structural Engineering
Abstract: A series of tests was performed to investigate salient mechanical properties of concrete in which Portland Cement (PC) was replaced by different combinations of low energy-demanding materials, namely binary or ternary combinations of Pulverised Fuel Ash (PFA), Metakaolin (MK) and reactive magnesia (MgO) at various percentages. The potential use of the latter material in structural concrete has not been established and further research is needed prior to industrial scale applications. Tests investigated the setting times and soundness of the resulting cement, as well as the workability, cube compressive strength at various curing times, tensile splitting strength, flexural strength and water absorption of the resulting concrete. The results showed that mixes combining the above materials at the right proportions i.e. MK up to a maximum of 20%, PFA up to 20% and 5–10% MgO, show good potential for replacing high proportions of PC (up to 50%), giving good quality concrete in terms of strength and durability, with improved environmental impact.
Published: 2015
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20. Creation and Validation of Calculated Pulse Databases for Pulse Shape Analysis in the Planar Semiconductor Detectors of a Triple-Layered Compton Camera System

Author: J. Simpson, J. Platt, D. S. Judson, D. Walker, G. Bolton, A. J. Boston, D. Offin, J. Cresswell, E. Rintoul, I.H. Lazarus, P. J. Nolan, T.F. Woodroof, A. Caffrey, J. R. Wright, C. Unsworth, L. J. Harkness-Brennan, J. F. C. Cocks, and H. C. Boston
Subjects: Physics, Database, 010308 nuclear & particles physics, Compton camera, computer.software_genre, 01 natural sciences, Collimated light, Semiconductor detector, Pulse (physics), Planar, Position (vector), 0103 physical sciences, Pulse shape analysis, 010306 general physics, computer, Image resolution
Abstract: The position sensitive semiconductor detectors of a triple-layered Compton camera system have been characterised through collimated γ-ray scanning to aid with the subsequent development of a calculated database of charge collection signals. This database is used to perform Pulse Shape Analysis (PSA) on experimental signals in order to deliver position resolution beyond the limits of the physical voxel size. An improvement in image resolution of 3.73±0.18mm in X and 2.47±0.25mm in Y was achieved with the preliminary database comparison.
Published: 2018
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21. Shape Coexistence and Mixing of Low-Lying $0^+$ States in $^{96}$Sr

Author: G. Hackman, N. Terpstra, T. Bruhn, K. Kuhn, Corina Andreoiu, A. Cheeseman, T.E. Drake, R. Braid, C. Unsworth, D. S. Cross, W. Korten, Aaron Chester, Friedhelm Ames, R. A. E. Austin, P. C. Bender, A. Sanetullaev, W. N. Catford, D. Miller, Kathrin Wimmer, C.S. Bancroft, A. Matta, N. Sachmpazidi, S. Cruz, P. Voss, R. Krücken, M. Marchetto, C. Aa. Diget, Jens Lassen, Robert Laxdal, R. Kanungo, N. A. Orr, A. Knapton, C. E. Svensson, M. Moukaddam, A. B. Garnsworthy, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Nuclear reaction, Nuclear and High Energy Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory, Hadron, FOS: Physical sciences, Transfer reaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Molecular physics, Nuclear Theory (nucl-th), 0103 physical sciences, Single-particle structure, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Mixing (physics), Physics, 010308 nuclear & particles physics, Shape coexistence, lcsh:QC1-999, Baryon, Excited state, Nucleon, lcsh:Physics, Dimensionless quantity
Abstract: The low energy excited $0_{2,3}^+$ states in $^{96}$Sr are amongst the most prominent examples of shape coexistence across the nuclear landscape. In this work, the neutron $[2s_{1/2}]^2$ content of the $0_{1,2,3}^+$ states in $^{96}$Sr was determined by means of the d($^{95}$Sr,p) transfer reaction at the TRIUMF-ISAC2 facility using the SHARC and TIGRESS arrays. Spectroscopic factors of 0.19(3) and 0.22(3) were extracted for the $^{96}$Sr ground and 1229~keV $0^+$ states, respectively, by fitting the experimental angular distributions to DWBA reaction model calculations. A detailed analysis of the $\gamma$-decay of the isomeric $0_3^+$ state was used to determine a spectroscopic factor of 0.33(13). The experimental results are compared to shell model calculations, which predict negligible spectroscopic strength for the excited $0^+$ states in $^{96}$Sr. The strengths of the excited $0_{2,3}^+$ states were also analyzed within a two-level mixing model and are consistent with a mixing strength of $a^2$=0.40(14) and a difference in intrinsic deformations of $|\Delta \beta|=0.31(3)$. These results suggest coexistence of three different configurations in $^{96}$Sr and strong shape mixing of the two excited $0^+$ states., Comment: Phys Lett B accepted
Published: 2018
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22. Digital Rise-Time Discrimination of Pulses from the Tigress Integrated Plunger Silicon PIN Diode Wall

Author: G. Hackman, P. C. Bender, M. M. Rajabali, P. Voss, K. Starosta, E. R. Tardiff, Robert Henderson, G. C. Ball, C. Unsworth, Corina Andreoiu, Aaron Chester, A. B. Garnsworthy, R. Ashley, T.E. Drake, C. E. Svensson, Z. M. Wang, Steffen Ketelhut, D. S. Cross, R. Krücken, and D. Miller
Subjects: Plunger, Physics, Silicon, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, digital rise-time discrimination, PIN diode, Doppler-shift lifetime methods, chemistry.chemical_element, pulse-shape analysis, Coulomb excitation, Physics and Astronomy(all), Particle identification, law.invention, Nuclear magnetic resonance, gamma-ray spectroscopy, chemistry, law, Rise time, Radioactive beam physics, nuclear structure of exotic isotopes, Optoelectronics, Gamma spectroscopy, business
Abstract: Electromagnetic transition rate measurements play an important role in characterizing the evolution of nuclear structure with increasing proton-neutron asymmetry. At TRIUMF, the TIGRESS Integrated Plunger device and its suite of ancillary detector systems have been implemented for charged-particle tagging and light-ion identification in coincidence with gamma-ray spectroscopy for Doppler-shift lifetime studies and low-energy Coulomb excitation measurements. Digital pulse-shape analysis of signals from these ancillary detectors for particle identification improves the signal-to-noise ratio of gamma-ray energy spectra. Here, we illustrate the reaction-channel selectivity achieved by utilizing digital rise-time discrimination of waveforms from alpha particles and carbon ions detected with silicon PIN diodes, thereby enhancing gamma-ray line-shape signatures for precision lifetime studies.
Published: 2015
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23. Doppler-shift attenuation lifetime measurement of the Ar3621+ level

Author: P. Voss, K. Starosta, B. Jigmeddorj, R. Ashley, A. B. Garnsworthy, E. R. Tardiff, D. S. Cross, C. Unsworth, Aaron Chester, P. C. Bender, G. C. Ball, R. Churchman, Mustafa Rajabali, R. Orlandi, Corina Andreoiu, J. L. Pore, E. T. Rand, R. Krücken, A. T. Laffoley, Z. M. Wang, G. Hackman, T.E. Drake, R. Henderson, Steffen Ketelhut, C. J. Pearson, B. Hadinia, K. G. Leach, D.W. Miller, A. Signoracci, and C. E. Svensson
Subjects: Physics, 010308 nuclear & particles physics, Attenuation, Coulomb excitation, 01 natural sciences, Charged particle, symbols.namesake, Excited state, 0103 physical sciences, Quadrupole, symbols, Atomic physics, 010306 general physics, Spectroscopy, Doppler effect, Line (formation)
Abstract: At TRIUMF, the TIGRESS Integrated Plunger device and its suite of ancillary detector systems have been implemented for charged-particle tagging and light-ion identification in coincidence with $\ensuremath{\gamma}$-ray spectroscopy for Doppler-shift lifetime studies and low-energy Coulomb excitation measurements. As a test of the device, the lifetime of the first ${2}^{+}$ excited state in $^{36}\mathrm{Ar}$ was measured from the $\ensuremath{\gamma}$-ray line shape of the ${2}_{1}^{+}\ensuremath{\rightarrow}{0}_{\mathrm{g}.\mathrm{s}.}^{+}$ transition using the Doppler-shift attenuation technique following Coulomb excitation. The line-shape signatures, vital for precision lifetime measurements, were significantly improved by enhanced reaction-channel selectivity using a complementary approach of kinematic gating and digital rise-time discrimination of recoiling charged particles in a silicon PIN diode array. The lifetime was determined by comparisons between the data and simulated line shapes generated using our TIGRESS Coulomb excitation code as an input to the Lindhard method, which was then extended and included as a class in geant4. The model-independent lifetime result of $490\ifmmode\pm\else\textpm\fi{}50$ fs corresponds to a reduced quadrupole transition strength of $B(E2;{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{\mathrm{g}.\mathrm{s}.}^{+})=56\ifmmode\pm\else\textpm\fi{}6\phantom{\rule{0.28em}{0ex}}{\mathrm{e}}^{2}{\mathrm{fm}}^{4}$ and agrees well with previous intermediate energy Coulomb excitation measurements, thereby resolving reported discrepancies in the ${2}_{1}^{+}$ level lifetime in this self-conjugate nucleus.
Published: 2017
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24. Nuclear Force Imprints Revealed on the Elastic Scattering of Protons with C10

Author: Barry Davids, G. Hackman, Gary D. Christian, Sofia Quaglioni, Jennifer Fallis, A. C. Shotter, A. T. Laffoley, C. Unsworth, Jérémy Dohet-Eraly, J.C. Lighthall, E. T. Rand, A. T. Gallant, A. Kumar, Guillaume Hupin, Petr Navrátil, Martín Alcorta, Angelo Calci, D. Miller, A. Rojas, Junji Tanaka, V. Bildstein, S. Ishimoto, J. S. Randhawa, Robert Roth, Isao Tanihata, Rituparna Kanungo, A. Sanetullaev, R. Krücken, and Baharak Hadinia
Subjects: Elastic scattering, Nuclear reaction, Physics, Quantum chromodynamics, Proton, 010308 nuclear & particles physics, Nuclear Theory, Strong interaction, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Quantum mechanics, 0103 physical sciences, Nuclear force, Neutron, Nuclear drip line, Nuclear Experiment, 010306 general physics
Abstract: How does nature hold together protons and neutrons to form the wide variety of complex nuclei in the Universe? Describing many-nucleon systems from the fundamental theory of quantum chromodynamics has been the greatest challenge in answering this question. The chiral effective field theory description of the nuclear force now makes this possible but requires certain parameters that are not uniquely determined. Defining the nuclear force needs identification of observables sensitive to the different parametrizations. From a measurement of proton elastic scattering on ^{10}C at TRIUMF and ab initio nuclear reaction calculations, we show that the shape and magnitude of the measured differential cross section is strongly sensitive to the nuclear force prescription.
Published: 2017
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25. Scattering Of The Halo Nucleus 11Be On A 197Au Target At Energies Around The Coulomb Barrier

Author: U. Hager, Gloria Marquínez-Durán, V. Pesudo, Oliver S. Kirsebom, Mustafa Rajabali, D.W. Miller, Olof Tengblad, Valentina Scuderi, Enrique Nácher, C. Unsworth, Maria Fisichella, B. R. Fulton, M. Lattuada, Frederique Sarazin, María José García Borge, A. M. Moro, Joaquín Gómez-Camacho, A. B. Garnsworthy, Ángel Perea, P. C. Bender, Mario Cubero., Martín Alcorta, P. Figuera, J. P. Fernández-García, R. Braid, A. Di Prieto, G. Hackman, K. Kuhn, Patrick O'Malley, Mirta Alvarez, Josè A. Lay, A. M. Sánchez-Benítez, M. Moukaddam, Z. M. Wang, C. E. Svensson, and Ismael Martel
Subjects: Physics, Nuclear physics, Scattering, Coulomb barrier, Semiclassical physics, Halo nucleus, Neutron, Halo, Inelastic scattering, Nuclear Experiment, Semiconductor detector
Abstract: The angular distributions of the elastic, inelastic scattering and break-up cross sections of the one neutron halo $^{11}$Be on a heavy-mass target ($^{197}$Au) have been measured at laboratory energies below (31.9 MeV) and around (39.6 MeV) the Coulomb barrier ($V_b \sim$ 40 MeV). The elastic, inelastic channel and break-up channels of the $^{11}$Be + $^{197}$Au reaction have been experimentally separated for the first time in this energy range. The experiment was performed at TRIUMF, using four Silicon detectors in telescope configuration to separate the $^{11}$Be from the $^{10}$Be fragments and the High-Purity Germanium Detector Array TIGRESS for $\gamma$-ray detection. The break-up and inelastic scattering contributions are observed to be relevant even at energies well below the Coulomb barrier. Data are compared with different models of increasing degree of sophistication: semiclassical, inert-core continuum discretised coupled channel (CDCC) calculations and CDCC including core deformation and excitations (XCDCC). XCDCC calculations are necessary to reproduce simultaneously elastic, inelastic and break-up scattering data. The results show that the reaction mechanism is sensible to the entanglement of core and halo degrees of freedom in $^{197}$Au.
Published: 2017
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26. Scattering of the Halo Nucleus Be 11 on

Author: B. R. Fulton, K. Kuhn, Corina Andreoiu, Joaquín Gómez-Camacho, R. Braid, M. M. Rajabali, A. B. Garnsworthy, Ismael Martel, P. C. Bender, Luis Acosta, M. Lattuada, G. Marquínez-Durán, Valentina Scuderi, G. Hackman, V. Pesudo, A. M. Sánchez-Benítez, U. Hager, Oliver S. Kirsebom, Martín Alcorta, M. Moukaddam, Ángel Perea, J. A. Lay, Z. Wang, M. Cubero, M. A. G. Alvarez, C. Unsworth, P. Figuera, M. J. G. Borge, D. Miller, Enrique Nácher, C. E. Svensson, J. P. Fernández-García, A. M. Moro, Maria Fisichella, A. Di Pietro, P. D. O'Malley, Olof Tengblad, and F. Sarazin
Subjects: Physics, 010308 nuclear & particles physics, Scattering, Degrees of freedom (physics and chemistry), General Physics and Astronomy, Semiclassical physics, Coulomb barrier, Halo nucleus, Breakup, 01 natural sciences, 0103 physical sciences, Nuclear cross section, Halo, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: Angular distributions of the elastic, inelastic, and breakup cross sections of the halo nucleus ^{11}Be on ^{197}Au were measured at energies below (E_{lab}=31.9 MeV) and around (39.6 MeV) the Coulomb barrier. These three channels were unambiguously separated for the first time for reactions of ^{11}Be on a high-Z target at low energies. The experiment was performed at TRIUMF (Vancouver, Canada). The differential cross sections were compared with three different calculations: semiclassical, inert-core continuum-coupled-channels and continuum-coupled-channels ones with including core deformation. These results show conclusively that the elastic and inelastic differential cross sections can only be accounted for if core-excited admixtures are taken into account. The cross sections for these channels strongly depend on the B(E1) distribution in ^{11}Be, and the reaction mechanism is sensitive to the entanglement of core and halo degrees of freedom in ^{11}Be.
Published: 2017
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27. New systematic features in the neutron-deficient Au isotopes

Author: L. J. Harkness-Brennan, A. Špaček, M Bírová, J. Kliman, J Lušnák, M. Balogh, L Krupa, L Makhathini, P. M. Prajapati, Robert Page, D. T. Joss, R-D Herzberg, M. Veselský, A. M. Rodin, L Holub, Thomas Elias Cocolios, M. Venhart, C. Unsworth, A. J. Boston, J. L. Wood, Vladislav Matoušek, A. V. Podshibyakin, Kristian Petrík, Š. Motyčák, R. Urban, M. Sedlák, D. S. Judson, J. Klimo, and Adarsh Patel
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, 010308 nuclear & particles physics, Detector, Nuclear structure, 7. Clean energy, 01 natural sciences, Coincidence, Semiconductor detector, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Physics - Experiment, Nuclide, Atomic physics, Detectors and Experimental Techniques, 010306 general physics, Spectroscopy
Abstract: A recently developed portable, on-line capability for γ-ray and conversion-electron spectroscopy, HIGH-TATRA is demonstrated with its application to the study of (183)Hg $\to $ (183)Au at ISOLDE. Key details of the low-energy level scheme of the neutron-deficient nuclide (183)Au populated in this decay are presented. A broad energy germanium detector is employed to achieve this (the first-ever use of such a device in decay-scheme spectroscopy), by way of a combination of high-gain γ-ray singles spectroscopy and γ–γ coincidence spectroscopy. Further, by combining the γ-ray detectors with a liquid-nitrogen-cooled Si(Li) detector operated under high vacuum, conversion-electron singles and e–γ coincidences are obtained. These data lead to the determination of transition multipolarities and the location of a highly converted (E0 + M1 + E2) transition in the (183)Au decay scheme, suggesting a possible new shape coexisting structure in this nucleus. Identification of new intruder and normal states fixes their relative energies in (183)Au for the first time. New systematic features in the odd-Au isotopes are presented.
Published: 2017
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28. The TIGRESS Integrated Plunger ancillary systems for electromagnetic transition rate studies at TRIUMF

Author: G. Hackman, A. Bey, K. Van Wieren, Z. M. Wang, T.E. Drake, A. Cheeseman, M. M. Rajabali, G. C. Ball, Corina Andreoiu, J. L. Pore, K. Starosta, J. Shoults, C. J. Pearson, P. C. Bender, E. T. Rand, P. Voss, D. S. Cross, E. R. Tardiff, P. Kowalski, R. Ashley, D. Miller, Robert Henderson, C. Unsworth, A. T. Laffoley, J. Williams, R. A. E. Austin, A. B. Garnsworthy, Aaron Chester, C. E. Svensson, R. Holland, U. Rizwan, Steffen Ketelhut, R. Krücken, K. G. Leach, W. J. Mills, and M. Moukaddam
Subjects: Physics, Plunger, Nuclear reaction, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, PIN diode, Coulomb excitation, Scintillator, law.invention, Nuclear physics, Optics, law, Gamma spectroscopy, business, Instrumentation, Electronic circuit
Abstract: The TIGRESS Integrated Plunger device is a new experimental tool for nuclear structure investigations via gamma-ray spectroscopy with post-accelerated beams from the ISAC-II facility at TRIUMF. Several ancillary detection systems integral to the device׳s capabilities for charged-particle tagging and light-ion identification following a variety of nuclear reaction mechanisms have been constructed and characterized. In particular, a silicon PIN diode wall, an annular silicon segmented detector, and a CsI(Tl) scintillator wall have together enabled particle-gamma correlations for reaction channel selectivity and precision kinematic reconstruction in recent measurements. We highlight the construction, characteristics, and implementation of the device׳s ancillary detectors as they enable a rich set of electromagnetic transition rate measurements via Doppler-shift lifetime techniques and low-energy Coulomb excitation.
Published: 2014
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29. High-precision Half-life And Branching Ratio Measurements For Superallowed $\beta^+$ Emitters At TRIUMF-ISAC

Author: Steffen Ketelhut, J. R. Leslie, C. E. Svensson, A. Diaz Varela, P. Voss, B. Blank, A. Valencik, P. C. Bender, A. J. Radich, J. P. Thomas, Joochun Park, J. Giovinazzo, Aaron Chester, S. Triambak, J. Wong, I. S. Towner, G. C. Ball, Corina Andreoiu, D. W. Miller, C. Unsworth, A. B. Garnsworthy, R. Dunlop, K. Starosta, D. S. Jamieson, B. Jigmeddorj, J. Grinyer, H. Bidaman, W. J. Mills, Mustafa Rajabali, E. R. Tardiff, E. F. Zganjar, G. Hackman, A. T. Laffoley, A. D. MacLean, P. Finlay, M. Moukaddam, E. T. Rand, D. S. Cross, S. Chagnon-Lessard, R. A. E. Austin, Z. M. Wang, S. W. Yates, G. F. Grinyer, J. Glister, K. G. Leach, J. Turko, D. Kisliuk, G. Deng, V. Bildstein, S. J. Williams, H. Bouzomita, Baharak Hadinia, Michelle Dunlop, P. E. Garrett, T. Ballast, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear physics, Physics, Spectrometer, Branching fraction, Electroweak interaction, Half-life, Weak interaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Fermi Gamma-ray Space Telescope
Abstract: High precision measurements of the $ft$ values for superallowed Fermi $\beta$ transitions between $J^\pi~=~0^+$ isobaric analogue states allow for stringent tests of the electroweak interaction described by the Standard Model. These transitions provide an experimental probe of the Conserved-Vector-Current hypothesis, enable the most precise determination of the up-down ($V_{ud}$) element of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix, and allow one to set stringent limits on the existence of scalar currents in the weak interaction. An extensive program of superallowed branching-ratio and half-life measurements at TRIUMF's Isotope Separator and Accelerator (ISAC) facility has covered the full range of superallowed emitters, from the lightest case, $^{10}$C, to the heaviest case for which precision data are currently available, $^{74}$Rb. These experiments have been performed using a 4$\pi$ continuous-flow gas proportional $\beta$ counter, the 8$\pi$ $\gamma$-ray spectrometer, and, most recently, the new high-efficiency GRIFFIN $\gamma$-ray spectrometer. In this paper, recent highlights from the superallowed Fermi $\beta$ decay program at TRIUMF will be summarized, including high-precision half-life measurements for all three of the lightest superallowed emitters, $^{10}$C, $^{14}$O, and $^{18}$Ne, with the greatest sensitivity to a potential weak scalar current contribution, as well as high-precision branching-ratio measurements for the heavy superallowed emitters $^{62}$Ga and $^{74}$Rb.
Published: 2016
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30. Observation of a largeβ-delayed neutron emission component inRb102decay and identification of excited states inSr102

Author: R. Krücken, A. T. Laffoley, Mustafa Rajabali, A. J. Radich, R. Dunlop, P. C. Bender, G. C. Ball, Corina Andreoiu, B. Hadinia, D.W. Miller, P. Voss, Steffen Ketelhut, A. Voss, L. J. Evitts, J. L. Pore, G. A. Demand, K. G. Leach, A. Tan, V. Bildstein, E. R. Tardiff, G. Hackman, D. S. Cross, Z. Wang, A. B. Garnsworthy, M. Moukaddam, C. Unsworth, P. E. Garrett, and C. E. Svensson
Subjects: Physics, Identification (information), 010308 nuclear & particles physics, Component (thermodynamics), Excited state, 0103 physical sciences, Atomic physics, 010306 general physics, 01 natural sciences, Delayed neutron
Published: 2016
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31. High-Precision Half-Life Measurements for the Superallowedβ+EmitterC10: Implications for Weak Scalar Currents

Author: P. C. Bender, E. T. Rand, Baharak Hadinia, A. D. MacLean, G. Hackman, E. F. Zganjar, T. Ballast, A. T. Laffoley, Joochun Park, W. J. Mills, D. S. Jamieson, V. Bildstein, M. M. Rajabali, G. F. Grinyer, A. B. Garnsworthy, P. E. Garrett, Corina Andreoiu, A. Valencik, R. Dunlop, J. R. Leslie, C. E. Svensson, C. Unsworth, R. A. E. Austin, A. Diaz Varela, G. C. Ball, A. J. Radich, M. R. Dunlop, D. M. Miller, and Z. Wang
Subjects: Physics, 010308 nuclear & particles physics, Scalar (physics), General Physics and Astronomy, Half-life, Weak interaction, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Relative precision, Neutrino, 010306 general physics, Fermi Gamma-ray Space Telescope, Common emitter
Abstract: Precision measurements of superallowed Fermi β-decay transitions, particularly for the lightest superallowed emitters ^{10}C and ^{14}O, set stringent limits on possible scalar current contributions to the weak interaction. In the present work, a discrepancy between recent measurements of the ^{10}C half-life is addressed through two high-precision half-life measurements, via γ-ray photopeak and β counting, that yield consistent results for the ^{10}C half-life of T_{1/2}=19.2969±0.0074 s and T_{1/2}=19.3009±0.0017 s, respectively. The latter is the most precise superallowed β-decay half-life measurement reported to date and the first to achieve a relative precision below 10^{-4}. A fit to the world superallowed β-decay data including the ^{10}C half-life measurements reported here yields b_{F}=-0.0018±0.0021 (68% C.L.) for the Fierz interference term and C_{S}/C_{V}=+0.0009±0.0011 for the ratio of the weak scalar to vector couplings assuming left-handed neutrinos.
Published: 2016
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32. High-Precision Half-Life Measurements for the Superallowed β+ Emitter $^{10}$C: Implications for Weak Scalar Currents

Author: M R, Dunlop, C E, Svensson, G C, Ball, G F, Grinyer, J R, Leslie, C, Andreoiu, R A E, Austin, T, Ballast, P C, Bender, V, Bildstein, A, Diaz Varela, R, Dunlop, A B, Garnsworthy, P E, Garrett, G, Hackman, B, Hadinia, D S, Jamieson, A T, Laffoley, A D, MacLean, D M, Miller, W J, Mills, J, Park, A J, Radich, M M, Rajabali, E T, Rand, C, Unsworth, A, Valencik, Z M, Wang, E F, Zganjar, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract: Precision measurements of superallowed Fermi β-decay transitions, particularly for the lightest superallowed emitters ^{10}C and ^{14}O, set stringent limits on possible scalar current contributions to the weak interaction. In the present work, a discrepancy between recent measurements of the ^{10}C half-life is addressed through two high-precision half-life measurements, via γ-ray photopeak and β counting, that yield consistent results for the ^{10}C half-life of T_{1/2}=19.2969±0.0074 s and T_{1/2}=19.3009±0.0017 s, respectively. The latter is the most precise superallowed β-decay half-life measurement reported to date and the first to achieve a relative precision below 10^{-4}. A fit to the world superallowed β-decay data including the ^{10}C half-life measurements reported here yields b_{F}=-0.0018±0.0021 (68% C.L.) for the Fierz interference term and C_{S}/C_{V}=+0.0009±0.0011 for the ratio of the weak scalar to vector couplings assuming left-handed neutrinos.
Published: 2016
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33. Measurement of lifetimes inMg23

Author: G. Christian, Chris Ruiz, S. T. Nielsen, C. Unsworth, A. B. Garnsworthy, Jennifer Fallis, A. Rojas, A. Sanetullaev, A. J. Radich, R. Churchman, C. J. Pearson, Christopher Wrede, L. J. Evitts, J.C. Lighthall, D. Miller, Barry Davids, G. Hackman, C. R. Nobs, Oliver S. Kirsebom, A. Cheeseman, N. Galinski, M. M. Rajabali, D. S. Cross, P. Machule, P. C. Bender, and Steffen Ketelhut
Subjects: Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Attenuation, 0103 physical sciences, Monte Carlo method, Atomic physics, 010306 general physics, 01 natural sciences, Line (formation)
Abstract: Several lifetimes in $^{23}\text{Mg}$ have been determined for the first time using the Doppler-shift attenuation method. A Monte Carlo simulation code has been written to model the $\ensuremath{\gamma}$-ray line shape. An upper limit of $\ensuremath{\tau}l12$ fs at the 95% C.L. has been obtained for the astrophysically important 7787 keV state.
Published: 2016
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34. Characterisation of a Broad Energy Germanium (BEGe) detector

Author: J.R. Cresswell, Diego Barrientos, H. C. Boston, S. Moon, I. C. Sagrado, C. Unsworth, A. J. Boston, and Begoña Quintana
Subjects: Physics, Nuclear and High Energy Physics, Signal processing, Physics::Instrumentation and Detectors, business.industry, Detector, chemistry.chemical_element, Germanium, Tracking (particle physics), Collimated light, Pulse (physics), Optics, chemistry, High Energy Physics::Experiment, Gamma spectroscopy, business, Instrumentation, Energy (signal processing)
Abstract: Characterisation of Germanium detectors used for gamma-ray tracking or medical imaging is one of the current goals in the Nuclear physics community. Good knowledge of detector response to different gamma radiations is needed for this purpose. In order to develop this task, Pulse Shape Analysis (PSA) techniques have been developed for different detector geometries or setups. In this work, we present the results of the application of PSA for a Canberra Broad Energy Germanium (BEGe) detector. This detector was scanned across its front and bottom face using a fully digital data acquisition system; allowing to record detector charge pulse shapes from well defined positions with collimated sources of 241 Am, 22 Na and 137 Cs. With the study of the data acquired, characteristics of the inner detector geometry like crystal limits or positions of contact and isolate can be found, as well as the direction of the axes for the Germanium crystal.
Published: 2011
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35. Quadrupole moments of collective structures up to spin ∼65ℏ in 157Er and 158Er: A challenge for understanding triaxiality in nuclei

Author: C. Unsworth, S. Zhu, J. Simpson, L. L. Riedinger, P. J. Nolan, T. Lauritsen, M. A. Riley, F. G. Kondev, Martin Carpenter, H. C. Boston, J. T. Matta, J. P. Revill, R. V. F. Janssens, N. M. Lumley, C. J. Chiara, E. S. Paul, J. Ollier, D. S. Judson, Ingemar Ragnarsson, U. Garg, Susan Rigby, A. D. Ayangeakaa, Xuan Wang, D. J. Hartley, and Marina Petri
Subjects: Physics, Nuclear and High Energy Physics, Short axis, 010308 nuclear & particles physics, Nuclear Theory, Rotation, 01 natural sciences, 0103 physical sciences, Quadrupole, Atomic physics, Deformation (engineering), 010306 general physics, Spin (physics), Principal axis theorem, Bar (unit)
Abstract: The transition quadrupole moments. Q(t), of four weakly populated collective bands up to spin similar to 65h in Er-157,Er-158 have been measured to be similar to II eb demonstrating that these sequences are associated with large deformations. However, the data are inconsistent with calculated values from cranked Nilsson-Strutinsky calculations that predict the lowest energy triaxial shape to be associated with rotation about the short principal axis. The data appear to favor either a stable triaxial shape rotating about the intermediate axis or, alternatively, a triaxial shape with larger deformation rotating about the short axis. These new results challenge the present understanding of triaxiality in nuclei. (C) 2011 Elsevier B.V. All rights reserved. (Less)
Published: 2011
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36. Performance of an AGATA asymmetric detector

Author: C. Unsworth, John Simpson, Matthew Richard Dimmock, M. Slee, A. J. Boston, H. C. Boston, A. N. Grint, L. J. Harkness, Reynold J. Cooper, P. J. Nolan, D. C. Oxley, M. Jones, and I.H. Lazarus
Subjects: Physics, Nuclear and High Energy Physics, Photon, Spectrometer, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Tracking (particle physics), Electromagnetic radiation, Particle detector, Semiconductor detector, Nuclear physics, Data acquisition, Optics, Gamma spectroscopy, AGATA, Sensitivity (control systems), business, Hpge detector, Instrumentation
Abstract: High-resolution gamma-ray detectors based on high-purity germanium crystals (HPGe) are one of the key workhorses of experimental nuclear science. The technical development of such detector technology has been dramatic in recent years. Large volume, high-granularity, electrically segmented HPGe detectors have been realised and a methodology to improve position sensitivity using pulse-shape analysis coupled with the novel technique of gamma-ray tracking has been developed. Collaborations have been established in Europe (Advanced GAmma Tracking Array (AGATA)) [J. Simpson, Acta Phys. Pol. B 36 (2005) 1383] and the USA (GRETA/GRETINA) [C.W. Beausang, Nucl. Instr. and Meth. B 204 (2003)] to build gamma-ray tracking spectrometers. This paper discusses the performance of the first AGATA asymmetric detector that has been tested at the University of Liverpool. The use of a fully digital data acquisition system has allowed detector charge pulse shapes from a selection of well-defined photon interaction positions to be analysed, yielding important information on the position sensitivity of the detector.
Published: 2009
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37. Characterisation Results From an AGATA Prototype Detector

Author: L. Nelson, A. J. Boston, John Simpson, Matthew Richard Dimmock, I.H. Lazarus, C. Unsworth, P. J. Nolan, J.R. Cresswell, and H. C. Boston
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Preamplifier, 9 mm caliber, Detector, Gamma ray, Collimated light, Semiconductor detector, symbols.namesake, Optics, Nuclear Energy and Engineering, symbols, High Energy Physics::Experiment, AGATA, Electrical and Electronic Engineering, business, Doppler effect
Abstract: An Advanced GAmma Tracking Array (AGATA) symmetric prototype high purity Germanium (HPGe) detector has been tested. The detector was illuminated with a 1 mm collimated beam of 137Cs (662 keV) gamma rays. The beam was raster scanned across the front and sides of the detector and the charge sensitive preamplifier output pulse shapes from all 37 channels (36 segments plus the centre contact) were digitised and stored for off-line analysis. Rise time and image charge asymmetry magnitudes were measured as a function of interaction position to study the charge transport properties through the crystal volume. These parameters were then utilised as a calibrated look up table with which in-beam data was analysed and Doppler corrected. An average position resolution of approximately 9 mm (FWHM) was achieved with a crude analysis.
Published: 2009
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38. The application of pulse shape analysis to in-beam EXOGAM data

Author: H. C. Boston, G DeFrance, Reynold J. Cooper, A. N. Grint, Matthew Richard Dimmock, C. Unsworth, D. C. Oxley, A. J. Boston, P. J. Nolan, Department of Physics, University of Liverpool, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), R. Bates, K. Mathieson, V. O'Shea, C. Parkes, P. Soler, and EXOGAM
Subjects: Physics, Nuclear and High Energy Physics, business.industry, media_common.quotation_subject, Detector, Gamma ray, Pulse shapeanalysis, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Image chargeasymmetry, Risetime analysis, Method of image charges, Asymmetry, Semiconductor detector, Full width at half maximum, EXOGAM, Optics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], HPGe, business, Instrumentation, Noise (radio), Beam (structure), media_common
Abstract: The performance of Pulse Shape Analysis (PSA) techniques when applied to EXOGAM has been assessed using data collected in-beam at GANIL (Grand Accelerateur National d’Ions Lourds). Gamma rays from the decay of 94 , 95 Mo were incident upon two EXOGAM clovers and the resulting charge pulses were digitised. Risetime and Image Charge Asymmetry (ICA) techniques have been applied to the data to increase the granularity of the detectors beyond the electrical segmentation of the outer contact. Before PSA the position resolution in the plane of the detector front face is 14.5 mm FWHM. Close to segment boundaries, where the magnitude of induced charge pulses is changing quickly with position, this can be improved to around 10 mm. Further from segment boundaries little improvement is seen due to the magnitude of pulses induced in neighbouring segments being less than that of the detector baseline noise.
Published: 2009
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39. High-precision half-life measurements for the superallowed Fermiβ+emitterNe18

Author: A. T. Laffoley, C. E. Svensson, C. Andreoiu, G. C. Ball, P. C. Bender, H. Bidaman, V. Bildstein, B. Blank, D. S. Cross, G. Deng, A. Diaz Varela, M. R. Dunlop, R. Dunlop, A. B. Garnsworthy, P. E. Garrett, J. Giovinazzo, G. F. Grinyer, J. Grinyer, G. Hackman, B. Hadinia, D. S. Jamieson, B. Jigmeddorj, D. Kisliuk, K. G. Leach, J. R. Leslie, A. D. MacLean, D. Miller, B. Mills, M. Moukaddam, A. J. Radich, M. M. Rajabali, E. T. Rand, J. C. Thomas, J. Turko, C. Unsworth, and P. Voss
Subjects: Nuclear and High Energy Physics
Published: 2015
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40. Scattering of Halo Nuclei at Energies below and around the Coulomb Barrier

Author: Ismael Martel, C. Unsworth, A. Di Pietro, L. Buchmann, H. O. U. Fynbo, Olof Tengblad, F. Sarazin, D. Escrig, A. M. Sánchez-Benítez, B. R. Fulton, M. Rodríguez-Gallardo, C. A. Diget, G. Hackman, Thomas Nilsson, Daniel Galaviz, M. Madurga, M. J. G. Borge, M. Cubero, M. Alcorta, A. M. Moro, A. C. Shotter, V. Pesudo, K. Rusek, L. Acosta, M. A. G. Alvarez, P. C. Bender, P.L. Walden, P. Figuera, H. A. Falou, J. Gómez-Camacho, A. B. Garnsworthy, J. P. Fernández-García, R. Kanungo, J. A. Lay, I. G. Mukha, and Mustafa Rajabali
Subjects: Physics, Scattering, Coulomb barrier, Halo, Atomic physics, Mott scattering
Published: 2015
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41. Investigating Single-Particle Structure in 26Na Using the New SHARC Array

Author: H Al-Falou, W. N. Catford, S. M. Brown, A. J. Boston, A. B. Garnsworthy, G. L. Wilson, Rae Austin, M. Djongolov, S. J. Williams, M. Porter-Peden, N. A. Orr, B. R. Fulton, D. S. Cross, K. G. Leach, C. Sumithrarachchi, J. N. Orce, F. Sarazin, R. Kanungo, C. Unsworth, D. S. Jamieson, André Palma da Cunha Matta, R. Ashley, P. Adsley, S. Triambak, D. Smalley, T.E. Drake, S. Sjue, J. C. Blackmon, U. Hager, N. Galinski, R. Wadsworth, I. C. Celik, Edward Simpson, C. Aa. Diget, C. J. Pearson, G. Hackman, S. P. Fox, H. C. Boston, G. C. Ball, N. L. Achouri, University of Surrey (UNIS), University of York [York, UK], Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), TRIUMF [Vancouver], University of Liverpool, Saint Mary's University [Halifax], University of Louisiana, University of Toronto, University of Guelph, and Colorado School of Mines
Subjects: Physics, Nuclear Theory, Structure (category theory), Particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 7. Clean energy, Molecular physics
Abstract: International audience; The changing of the nuclear shells for light, neutron-rich nuclei, and the single-particle nature of 26Na, has been explored by studying 25Na(d, p)26Na in inverse kinematics, using a beam of 25Na ions at 5 MeV per nucleon, provided by the ISAC-II facility at TRIUMF, Vancouver. Charged particles were detected with a highly-segmented silicon array that surrounded the 0.5 mg/cm2 (CD2)n target. Gamma rays from the recoiling 26Na nucleus were detected using eight Compton-suppressed HPGe clover detectors. Recoil tagging was provided by an in-beam scintillation foil, downstream of the germanium array. A novel technique of utilising pγ- and pγγ-gating to extract proton angular distributions from states populated close in energy was employed with success. New states in 26Na that are populated directly have been identified, using γ-decay patterns. Shell model calculations for comparison to experimental results are ongoing, using different model bases.
Published: 2015
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42. Evidence of Soft Dipole Resonance inLi11with Isoscalar Character

Author: C. Unsworth, N. Galinski, R. Krücken, J. P. Fortin, P. C. Bender, P. Voss, Gaute Hagen, Toshio Suzuki, G. Hackman, A. Chen, Gustav R. Jansen, Isao Tanihata, T. Roger, J. Lighthall, T. Myo, Takaharu Otsuka, A. Sanetullaev, Barry Davids, D. Miller, Corina Andreoiu, Z. Wang, A. C. Shotter, Ian J. Thompson, M. Keefe, A. T. Gallant, A. Rojas, Shigeru Ishimoto, Jennifer Fallis, E. McNeice, J. Purcell, R. Kanungo, J. S. Randhawa, H. Savajols, Baharak Hadinia, Junki Tanaka, and P. E. Garrett
Subjects: Physics, Isoscalar, Nuclear Theory, General Physics and Astronomy, Resonance, Inelastic scattering, Nuclear physics, Dipole, Coupled cluster, Ab initio quantum chemistry methods, Physics::Accelerator Physics, Born approximation, Atomic physics, Excitation
Abstract: The first conclusive evidence of a dipole resonance in 11Li having isoscalar character observed from inelastic scattering with a novel solid deuteron target is reported. The experiment was performed at the newly commissioned IRIS facility at TRIUMF. The results show a resonance peak at an excitation energy of 1.03±0.03 MeV with a width of 0.51±0.11 MeV (FWHM). The angular distribution is consistent with a dipole excitation in the distorted-wave Born approximation framework. The observed resonance energy together with shell model calculations show the first signature that the monopole tensor interaction is important in 11Li. The first ab initio calculations in the coupled cluster framework are also included.
Published: 2015
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43. Scattering of halo nuclei on heavy targets at energies around the Coulomb barrier: The case of 11Be on 197Au

Author: J. P. Fernández-García, P. C. Bender, Luis Acosta, A. Di Pietro, M. A. G. Alvarez, Ismael Martel, Olof Tengblad, F. Sarazin, V. Pesudo, Patrick O'Malley, C. Unsworth, R. Braid, Oliver S. Kirsebom, D. Miller, Enrique Nácher, G. Marquínez-Durán, C. E. Svensson, Martín Alcorta, Ángel Perea, B. R. Fulton, Valentina Scuderi, M. Lattuada, Z. M. Wang, Joaquín Gómez-Camacho, A. B. Garnsworthy, María José García Borge, A. M. Sánchez-Benítez, U. Hager, Corina Andreoiu, P. Figuera, K. Kuhn, Maria Fisichella, M. Moukaddam, G. Hackman, M. M. Rajabali, A. M. Moro, M. Cubero, J. A. Lay, and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Subjects: Physics, Elastic scattering, 010308 nuclear & particles physics, Scattering, QC1-999, Continuum (design consultancy), Coulomb barrier, Inelastic scattering, Mott scattering, Breakup, 01 natural sciences, 7. Clean energy, 0103 physical sciences, Nuclear Physics - Experiment, Halo, Atomic physics, 010306 general physics
Abstract: This work reports on the scattering of 11Be on 197Au at energies around and below the Coulomb barrier. By experimentally identifying the elastic scattering, inelastic scattering and breakup channels, and comparing them with different calculations, valuable information on the 11Be structure and its B(E1) distribution to the continuum are obtained. On top of that, a deeper understanding of the scattering process at low energies is achieved for reactions of this kind, making these studies extendable to other loosely-bound systems like 17,19C Gobierno de España FPA2015-64969-P, FIS2014-53448-C2-1-P, FPA2013-47327-c02-01-R, FPA2012-32443, FIS2013-41994-P, CSD2007-00042 EUROCORES EUI-2009-04162 European Union 654002
Published: 2017
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44. Lifetime measurements of states inO15

Author: H. Al Falou, N. Galinski, G. Hackman, M. A. Schumaker, Matthew Jones, A. B. Garnsworthy, C. Unsworth, Chris Ruiz, D. Howell, Ritesh Kshetri, Götz Ruprecht, G. C. Ball, R. Kanungo, E. T. Rand, D. S. Cross, S. Sjue, Barry Davids, K. G. Leach, M. Moukaddam, U. Hager, S. Triambak, J. R. Leslie, C. E. Svensson, and J. N. Orce
Subjects: Physics, Nuclear and High Energy Physics, Resonance, Atomic physics, Energy (signal processing)
Abstract: At low stellar temperatures the energy release due to the CN cycle is regulated by its slowest reaction ${}^{14}\mathrm{N}(p,\ensuremath{\gamma}){}^{15}\mathrm{O}$, the rate of which strongly depends on the subthreshold resonance at ${E}_{\mathrm{c}}.\mathrm{m}.=\ensuremath{-}504\phantom{\rule{0.28em}{0ex}}\mathrm{keV}$, which corresponds to the 6.79 MeV state in ${}^{15}\mathrm{O}$. By using the Doppler-shift attenuation method and the ${}^{3}\mathrm{He}({}^{16}\mathrm{O},\ensuremath{\alpha}){}^{15}\mathrm{O}$ reaction to populate the state, we obtained an upper limit on the lifetime of this state of $\ensuremath{\tau}l1.8\phantom{\rule{0.28em}{0ex}}\mathrm{fs}$ [68.3% confidence level (C.L.)]. In addition we measured the lifetimes of the 6.18 and 6.86 MeV states to be $\ensuremath{\tau}l2.5$ and $\ensuremath{\tau}=13.{3}_{\ensuremath{-}1.2}^{+0.9}\phantom{\rule{0.28em}{0ex}}\mathrm{fs}$, respectively (68.3% C.L.), in good agreement with the literature.
Published: 2014
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45. High-Precision Half-Life Measurements for the Superallowed Fermi $\beta$+ Emitters $^{14}$O and $^{18}$Ne

Author: B. Hadinia, A. J. Radich, G. Deng, K. G. Leach, Corina Andreoiu, J. C. Thomas, A. B. Garnsworthy, D. S. Jamieson, E. R. Tardiff, D.W. Miller, H. Bouzomita, G. F. Grinyer, G. C. Ball, A. D. MacLean, Bertram Blank, Steffen Ketelhut, P. C. Bender, D. S. Cross, Rae Austin, M. Moukaddam, P. Voss, Mustafa Rajabali, H. Bidaman, E. T. Rand, J. Giovinazzo, B. Mills, M. R. Dunlop, A. T. Laffoley, A. Diaz Varela, P. Finlay, V. Bildstein, R. Dunlop, C. Unsworth, D. Kisliuk, P. E. Garrett, B. Jigmeddorj, J. Turko, J Grinyer, J. R. Leslie, C. E. Svensson, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Nuclear physics, Physics, Oxygen-14, half-life, Neon-18, Half-life, Superallowed beta decay, Beta (velocity), Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS, Fermi Gamma-ray Space Telescope
Abstract: International audience
Published: 2014
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46. Quadrupole moments of coexisting collective shapes at high spin in154Er

Author: J. Simpson, J. Ollier, A. J. Boston, S. Zhu, J. P. Revill, R. V. F. Janssens, E. S. Paul, C. R. Hoffman, Martin Carpenter, F. G. Kondev, C. Unsworth, T. Lauritsen, P. J. Nolan, Susan Rigby, Xuejun Wang, J. M. Rees, Ingemar Ragnarsson, C. J. Chiara, and M. A. Riley
Subjects: Physics, Erbium, Nuclear and High Energy Physics, Isotope, chemistry, Isotone, Attenuation, Quadrupole, chemistry.chemical_element, Atomic physics, Axial symmetry, Spin-½
Abstract: Four high-spin collective bands have been populated in Er-154(68)86 via the Pd-110(Ti-48, (4)n gamma)Er-154 reaction. Average transition quadrupole moments Q(t) have been measured for three of the bands by using the Doppler-shift attenuation method. The strongest band has a value of Q(t) = 11.0 +/- 1.0 e b, similar to values found recently for four triaxial strongly deformed (TSD) bands in Er-157,Er-158. The second band has a value of Q(t) = 19.5 +/- 3.2 e b, consistent with a predicted axially symmetric superdeformed (SD) shape, similar in deformation to the Dy-152 isotone, and is used as a calibration point. The third, new band has a value of Q(t) = 9.9 +/- 2.2 e b. The results confirm the unexpectedly large Q(t) moments for the favored TSD bands in light erbium isotopes. (Less)
Published: 2013
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47. High-precision half-life measurements for the superallowed Fermiβ+emitter14O

Author: J. Giovinazzo, D. S. Jamieson, A. Diaz Varela, D.W. Miller, G. Hackman, B. Blank, P. C. Bender, J Grinyer, R. Dunlop, M. R. Dunlop, A. B. Garnsworthy, H. Bidaman, A. D. MacLean, C. Unsworth, Corina Andreoiu, A. J. Radich, J. C. Thomas, P. Voss, B. Jigmeddorj, J. Turko, A. T. Laffoley, J. R. Leslie, C. E. Svensson, D. S. Cross, G. C. Ball, D. Kisliuk, G. F. Grinyer, G. Deng, Mustafa Rajabali, E. T. Rand, B. Mills, V. Bildstein, P. E. Garrett, M. Moukaddam, B. Hadinia, and K. G. Leach
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, Double beta decay, 0103 physical sciences, Half-life, Atomic physics, 010306 general physics, 01 natural sciences, Common emitter, Fermi Gamma-ray Space Telescope
Abstract: The half-life of the superallowed Fermi ${\ensuremath{\beta}}^{+}$ emitter $^{18}\mathrm{Ne}$ has been determined via two high-precision $\ensuremath{\beta}$ counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Using two different $4\ensuremath{\pi}$ continuous-flow gas-proportional counters, two independent measurements were made, yielding a weighted average of ${T}_{1/2}=1.{66400}_{\ensuremath{-}0.00048}^{+0.00057}$ s, which is consistent with but approximately 2 times more precise than a previous high-precision measurement based on $\ensuremath{\gamma}$-ray counting. The present work achieves $\ifmmode\pm\else\textpm\fi{}0.034%$ precision for the $^{18}\mathrm{Ne}$ half-life and will enable the inclusion of $^{18}\mathrm{Ne}$ among the set of precisely measured superallowed Fermi $\ensuremath{\beta}$-decay $ft$ values once improved measurements are made for its $Q$ value and superallowed branching ratio. As a test of systematic uncertainties, the half-life of $^{23}\mathrm{Ne}$ was measured and the world average has been improved, by a factor of 1.7, to $37.148\ifmmode\pm\else\textpm\fi{}0.032$ s.
Published: 2013
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48. High-Precision Half-life Measurements for the Superallowed $\beta$+ Emitter $^{14}$O

Author: Baharak Hadinia, P. E. Garrett, R. Dunlop, C. Unsworth, A. Diaz Varela, B. Blank, R. A. E. Austin, J. C. Thomas, A. B. Garnsworthy, J. Giovinazzo, G. C. Ball, G. Hackman, J. R. Leslie, D. S. Cross, Corina Andreoiu, C. E. Svensson, A. T. Laffoley, K. G. Leach, G. F. Grinyer, Steffen Ketelhut, H. Bouzomita, D. S. Jamieson, E. R. Tardiff, P. Finlay, Department of Physics [Guelph], University of Guelph, Department of Astronomy and Physics [Halifax], Saint Mary's University [Halifax], TRIUMF [Vancouver], Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Physics, Isotope, Spectrometer, QC1-999, Analytical chemistry, chemistry.chemical_element, Germanium, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Semiconductor detector, chemistry, Excited state, Statistical physics, Fermi Gamma-ray Space Telescope, Common emitter
Abstract: The half-life of 14 O, a superallowed Fermi β + emitter, has been determined via simultaneous γ and β counting experiments at TRIUMF’s Isotope Separator and Accelerator facility. Following the implantation of 14 O samples at the center of the 8 π spectrometer, a γ counting measurement was performed by detecting the 2313 keV γ -rays emitted from the first excited state of the daughter 14 N using 20 high-purity germanium (HPGe) detectors. A simultaneous β counting experiment was performed using a fast plastic scintillator positioned directly behind the implantation site. The results, T ½ ( γ ) = 70:632 ± 0:094 s and T ½ ( β ) = 70:610 ± 0:030 s, are consistent with one another and, together with eight previous measurements, establish a new average for the 14 O half-life of T ½ = 70:619 ± 0:011 s with a reduced χ 2 of 0.99.
Published: 2013
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49. High-precision half-life and branching-ratio measurements for superallowed Fermi + emitters at TRIUMF - ISAC

Author: S. Triambak, A. B. Garnsworthy, Chandana Sumithrarachchi, J. Giovinazzo, Steffen Ketelhut, B. Blank, S. Chagnon-Lessard, D. Bandyopadhyay, G. Hackman, J. Wong, A. A. Phillips, A. Diaz Varela, Corina Andreoiu, E. T. Rand, I. S. Towner, D. S. Jamieson, G. C. Ball, S. J. Williams, G. F. Grinyer, G. A. Demand, M. Djongolov, C. J. Pearson, K. G. Leach, J. R. Leslie, E. F. Zganjar, D. S. Cross, C. E. Svensson, R. Dunlop, A. T. Laffoley, H. Bouzomita, C. Unsworth, K. L. Green, R. A. E. Austin, J. C. Thomas, J. Glister, A. Chester, S. W. Yates, S. Ettenauer, Baharak Hadinia, P. E. Garrett, K. Starosta, E. R. Tardiff, P. Finlay, Department of Physics [Guelph], University of Guelph, Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Department of Astronomy and Physics [Halifax], Saint Mary's University [Halifax], TRIUMF [Vancouver], Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Ion beam, Isotope, half-life, Branching fraction, QC1-999, Half-life, Superallowed Fermi β decay, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Standard Model, Nuclear physics, Isospin, Physics::Accelerator Physics, Symmetry breaking, branching ratio, Nuclear Experiment, 26Alm, Fermi Gamma-ray Space Telescope
Abstract: International audience; A program of high-precision half-life and branching-ratio measurements for superallowed Fermi emitters is being carried out at TRIUMF's Isotope Separator and Accelerator (ISAC) radioactive ion beam facility. Recent half-life measurements for the superallowed decays of 14O, 18Ne, and 26Alm, as well as branching-ratio measurements for 26Alm and 74Rb are reported. These results provide demanding tests of the Standard Model and the theoretical isospin symmetry breaking (ISB) corrections in superallowed Fermi decays.
Published: 2013
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50. AGATA-Advanced GAmma Tracking Array

Author: A. Colombo, Y. Mariette, A. Johnson, W. Korten, A. Brondi, T. Faul, J. Robin, R. Depalo, M. Slee, J. Gre¸bosz, H. C. Boston, H. Harroch, B. Rossé, M. Filliger, M. Gulmini, A. Korichi, S. Brambilla, J.R. Cresswell, C. Parisel, P. Edelbruck, F. Ameil, F. Camera, C. Oziol, Matthew Richard Dimmock, G. Salvato, F. Morbiducci, J. Ropert, M. Borsato, E. Legay, Marco Bellato, C. Santos, Gheorghe Pascovici, L. Charles, J. Pancin, G. Casati, P. G. Bizzeti, T. Stanios, S. Lhenoret, Diego Barrientos, P.M. Jones, Andreas Görgen, V. Chambert, S. Aydin, K. Hauschild, B. Hervieu, R. Nicolini, J. Simpson, H. J. Wollersheim, L. Lavergne, Pär-Anders Söderström, G. S. Simpson, G. Jaworski, F. Filmer, R. Griffiths, P.S. Morrall, M. Petcu, G. Lo Bianco, D. Linget, A. Givechev, D. C. Oxley, M. Kogimtzis, F. Salomon, J. Jolie, D. Wells, S. Moon, C. Aufranc, A. Corsi, T. Descombes, N. Goel, J. Thornhill, N. Warr, Serkan Akkoyun, B. Birkenbach, F. Dorangeville, Joël Chavas, P. Medina, Roberto Isocrate, C. Weber, E. Merchan, Bo Cederwall, I. Kojouharov, Enrique Sanchis, A. Lopez-Martens, Oliver Wieland, F. Le Blanc, D. Seddon, S. C. Letts, D. Bazzacco, J. Leske, B. Bruyneel, Alberto Pullia, L. Nelson, G. La Rana, B. Travers, I. Burrows, G. Maron, S. Coelli, J. J. Valiente-Dobón, F. Saillant, Piotr Bednarczyk, V.L. Ngo, J. Mierzejewski, Norbert Pietralla, R.S. Kempley, N. Kurz, M. Rebeschini, S. Fantinel, D. L. Balabanski, A. J. Boston, F. Tomasi, R. Berthier, M. D. Salsac, B. Dulny, C. Stahl, N. Dosme, C. Fanin, R. Baumann, S. Pietri, A. Astier, M. Nicoletto, J. van der Marel, A. Bracco, Björn Jonson, D. Mengoni, D. Bloor, Luna Pellegri, F. Lefebvre, D. Pugnére, J. Egea, S. Cabaret, D. Curien, M. Reese, C. Commeaux, Dirk Rudolph, A. Giannatiempo, F. Recchia, L. Ramina, A. Lermitage, C. A. Ur, R. M. Lieder, I.P. Brawn, R. Menegazzo, R. Raine, Krasimir Mitev, D. R. Napoli, G. Suliman, M. Kebbiri, Y. Drouen, Susan Rigby, W. Me¸czyński, R. Wadsworth, F. Didierjean, P. Desesquelles, Ch. Veyssiere, S. Leoni, Vicente González, P. Gros, Y. Le Noa, M. Castoldi, O. Möller, R. Orlandi, Thomas Beck, M. Şenyiğit, A. Jungclaus, L. Gibelin, Mohammed Kaci, Zs. Podolyák, J. Gerl, S. Erturk, W. Gast, B. Melon, V. Mendéz, R. Peghin, P. Molini, M. N. Erduran, D. Conventi, Pankaj S. Joshi, E. Clément, F.A. Beck, A. Austin, A. Cortesi, J. Palin, P. Cocconi, L. J. Harkness, F. C. L. Crespi, Dirk Weisshaar, P. Sona, A. Czermak, D. Lersch, N. Blasi, Anton Khaplanov, O. Stezowski, B. Rubio, R. Venturelli, M.-H. Sigward, E. Viscione, José Salt, C. S. Özben, Giancarlo Ripamonti, P. Spolaore, Johan Nyberg, S. M. Lenzi, L. Legeard, N. Redon, C. Rossi Alvarez, C. He, R. Chapman, P. Le Pouhalec, C. Diarra, Herbert Hess, T. Engert, A. Kaşkaş, Stanislav Tashenov, S. Klupp, C. Michelagnoli, Elif Ince, A. Algora, J. F. Smith, M. Ozille, Alessandro Zucchiatti, Angelo Geraci, A. Olariu, M. Labiche, N. Karkour, Stefano Riboldi, P. Bourgault, C. M. Petrache, M. Palacz, M. El Chambit, J.-L. Cercus, M. Zie¸bliński, Alex Wiens, R. Beunard, X. Lafay, T. Habermann, M. Karolak, L. Costa, Y. Aubert, Begoña Quintana, A P Robinson, V. F. E. Pucknell, D. Rosso, A. Capsoni, Emanuele Vardaci, L. Mihailescu, M. Tripon, E. Farnea, Ch. Theisen, Enrico Calore, G. Duchêne, N. V. Zamfir, X. Grave, S. Lunardi, I.H. Lazarus, José Blasco, D. Montanari, J.A. Sampson, P. H. Regan, N. Marginean, M. Pignanelli, L. Arnold, G. Benzoni, R. Krücken, G. de Angelis, D.P. Scraggs, I. Piqueras, D. M. Cullen, A. Obertelli, A. Bürger, D. Bortolato, G. Rainovski, A.R. Mather, P. Reiter, C. Unsworth, G. Baulieu, P. J. Coleman-Smith, C. Boiano, M. Richer, Sébastien Perrier, Agnese Giaz, Reynold J. Cooper, V. Vandone, S. Tanguy, C. Domingo-Pardo, A. Bouty, A. N. Grint, A. Maj, A. Gottardo, L. Berti, E. Pachoud, R. Marginean, E. A. Stefanova, A. Triossi, M. Nespolo, D. Bucurescu, R. Moro, H.T.M. Ha, D. S. Judson, J. L. Tain, A. Perego, Francesco Lelli, P. Detistov, B.Y. Ky, J. Ljungvall, B. Sowicki, M. Schlarb, F. Azaiez, P. Pariset, Ertan Şahin, R. Gernhäuser, M. Turcato, John Paul Strachan, B. Million, A. Atac, F. Carrio, D. Delbourg, F. Veronese, Th. Kröll, B. Cahan, A. Hernandez-Prieto, M. A. Bentley, K.M.M. Tun-Lanoë, B. Alikhani, P. Boutachkov, S. Leboutelier, Maria Doncel, A. M. Bizzeti-Sona, R. Touzery, A. Nannini, A. Lotode, P. J. Nolan, G. Rampazzo, F. Zocca, H. Schaffner, J. Eberth, A. Gadea, N. Toniolo, T. Hüyük, Q.T. Doan, P. Petkov, S. Broussard, S. Badoer, M. Rigato, Philip M Walker, J. Pouthas, Ch. Finck, L. Milechina, M. Norman, E. Pierre, J. Roccaz, S.J. Colosimo, Lázaro Guevara, Glyn Wittwer, Millan, Vicente Gonzalez -- 0000-0001-6014-2586, Rainovski, Georgi -- 0000-0002-1729-0249, Jaworski, Grzegorz -- 0000-0003-2241-0329, KORTEN, Wolfram -- 0000-0002-3940-0816, Domingo-Pardo, Cesar -- 0000-0002-2915-5466, Triossi, Andrea -- 0000-0001-5140-9154, Huyuk, Tayfun -- 0000-0003-0597-9767, Ince, Elif -- 0000-0003-4821-5441, Algora, Alejandro -- 0000-0002-5199-1794, Calore, Enrico -- 0000-0002-2301-3838, Rubio, Berta -- 0000-0002-9149-4151, THEISEN, Christophe -- 0000-0002-8509-1022, Rudolph, Dirk -- 0000-0003-1199-3055, Gadea, Andres -- 0000-0002-4233-1970, santos, cayetano -- 0000-0003-0727-1914, nannini, adriana -- 0000-0003-0659-7648, Depalo, Rosanna -- 0000-0003-3943-7982, Suliman, gabriel -- 0000-0001-8475-1992, Blasco, Jose-Maria -- 0000-0002-7663-9092, Petrache, Costel -- 0000-0001-8419-1390, Pietralla, Norbert -- 0000-0002-4797-3032, Cederwall, Bo -- 0000-0003-1771-2656, Zucchiatti, Alessandro -- 0000-0002-3647-596X, Mendez Munoz, Victor -- 0000-0002-9044-1189, Kruecken, Reiner -- 0000-0002-2755-8042, Napoli, Daniel Ricardo -- 0000-0002-8154-6958, Tain, Jose L. -- 0000-0002-3263-6965, SANCHIS, ENRIQUE -- 0000-0002-9689-9131, Zieblinski, Miroslaw -- 0000-0002-8693-7317, Hauschild, Karl -- 0000-0003-2862-2445, Montanari, Daniele -- 0000-0002-1980-7686, senyigit, menekse -- 0000-0002-2408-4419, La Rana, Giovanni -- 0000-0003-2814-4113, Menegazzo, Roberto -- 0000-0002-3060-5276, Soderstrom, Par-Anders -- 0000-0002-9504-2814, Unsworth, Carl -- 0000-0002-4100-7466, Camera, Franco -- 0000-0003-1731-4834, Gorgen, Andreas -- 0000-0003-1916-9941, Hernandez Prieto, Alvaro -- 0000-0002-0340-0240, Recchia, Francesco -- 0000-0002-8428-0112, de France, Gilles -- 0000-0002-7439-1759, GOTTARDO, Andrea -- 0000-0002-0390-5767, Perrier, Sebastien -- 0000-0001-5055-9046, Sowicki, Bogdan -- 0000-0002-7208-0690, Robinson, Andrew -- 0000-0002-2510-1321, Sahin, Eda -- 0000-0003-0683-5140, Pullia, Alberto -- 0000-0002-6393-747X, Lelli, Francesco -- 0000-0003-1900-9171, Clement, Emmanuel -- 0000-0003-1887-717X, benzoni, giovanna -- 0000-0002-7938-0338, Jonson, Bjorn -- 0000-0002-9697-9115, Bednarczyk, Piotr -- 0000-0002-5699-5292, Jones, Pete -- 0000-0001-7480-6603, Nicoletto, Marino -- 0000-0001-9301-0782, Ripamonti, Giancarlo -- 0000-0002-9406-021X, Bentley, Michael -- 0000-0001-8401-3455, Pellegri, Luna -- 0000-0002-3227-3332, Barrientos, Diego -- 0000-0001-9693-2942, GIAZ, Agnese -- 0000-0002-2550-450X, [Boston, A. J. -- Boston, H. C. -- Colosimo, S. -- Cooper, R. J. -- Cresswell, J. R. -- Dimmock, M. R. -- Filmer, F. -- Grint, A. N. -- Harkness, L. J. -- Judson, D. S. -- Mather, A. R. -- Moon, S. -- Nelson, L. -- Nolan, P. J. -- Norman, M. -- Oxley, D. C. -- Rigby, S. -- Sampson, J. -- Scraggs, D. P. -- Seddon, D. -- Slee, M. -- Stanios, T. -- Thornhill, J. -- Unsworth, C. -- Wells, D.] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England -- [Akkoyun, S. -- Atac, A. -- Kaskas, A. -- Senyigit, M.] Ankara Univ, Fac Sci, Dept Phys, TR-06100 Ankara, Turkey -- [Algora, A. -- Barrientos, D. -- Domingo-Pardo, C. -- Egea, J. -- Gadea, A. -- Hueyuek, T. -- Kaci, M. -- Mendez, V. -- Rubio, B. -- Salt, J. -- Tain, J. L.] Univ Valencia, CSIC, IFIC, E-46980 Paterna, Spain -- [Alikhani, B. -- Boutachkov, P. -- Givechev, A. -- Goel, N. -- Leske, J. -- Merchan, E. -- Moeller, O. -- Pietralla, N. -- Reese, M. -- Stahl, C.] Tech Univ Darmstadt, IKP, D-64289 Darmstadt, Germany -- [Ameil, F. -- Beck, T. -- Boutachkov, P. -- Domingo-Pardo, C. -- Engert, T. -- Gerl, J. -- Goel, N. -- Habermann, T. -- Kojouharov, I. -- Kurz, N. -- Merchan, E. -- Pietri, S. -- Schaffner, H. -- Tashenov, S. -- Wollersheim, H. J.] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany -- [de Angelis, G. -- Badoer, S. -- Berti, L. -- Calore, E. -- Cocconi, P. -- Conventi, D. -- Costa, L. -- Fantinel, S. -- Gadea, A. -- Gottardo, A. -- Gulmini, M. -- He, C. -- Ince, E. -- Kroell, Th. -- Lelli, F. -- Maron, G. -- Molini, P. -- Napoli, D. R. -- Rigato, M. -- Rosso, D. -- Sahin, E. -- Spolaore, P. -- Toniolo, N. -- Valiente-Dobon, J. J.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, IT-35020 Padua, Italy -- [Arnold, L. -- Baumann, R. -- Beck, F. A. -- El Chambit, M. -- Charles, L. -- Curien, D. -- Didierjean, F. -- Duchene, G. -- Faul, T. -- Filliger, M. -- Finck, Ch. -- Medina, P. -- Pachoud, E. -- Parisel, C. -- Piqueras, I. -- Richer, M. -- Robin, J. -- Santos, C. -- Sigward, M. -H. -- Weber, C.] Univ Strasbourg, IPHC, F-67037 Strasbourg, France -- [Arnold, L. -- Baumann, R. -- Beck, F. A. -- El Chambit, M. -- Charles, L. -- Curien, D. -- Didierjean, F. -- Duchene, G. -- Faul, T. -- Filliger, M. -- Finck, Ch. -- Medina, P. -- Pachoud, E. -- Parisel, C. -- Piqueras, I. -- Richer, M. -- Robin, J. -- Santos, C. -- Sigward, M. -H. -- Weber, C.] CNRS, UMR 7178, F-67037 Strasbourg, France -- [Astier, A. -- Cabaret, S. -- Desesquelles, P. -- Dosme, N. -- Gibelin, L. -- Ha, H. T. M. -- Hauschild, K. -- Karkour, N. -- Korichi, A. -- Lafay, X. -- Leboutelier, S. -- Legay, E. -- Lhenoret, S. -- Linget, D. -- Ljungvall, J. -- Lopez-Martens, A. -- Morbiducci, F. -- Ngo, V. L. -- Pariset, P. -- Perrier, S. -- Pierre, E. -- Roccaz, J. -- Travers, B.] Univ Paris 11, CNRS, IN2P3, CSNSM, F-91405 Orsay, France -- [Atac, A. -- Nyberg, J. -- Soderstrom, P. -A.] Uppsala Univ, Dept Phys & Astron, Uppsala, Sweden -- [Atac, A. -- Cederwall, B. -- Johnson, A. -- Khaplanov, A. -- van der Marel, J. -- Milechina, L. -- Tashenov, S.] Royal Inst Technol, SE-10691 Stockholm, Sweden -- [Aubert, Y. -- Azaiez, F. -- Le Blanc, F. -- Cercus, J. -L. -- Chambert, V. -- Commeaux, C. -- Delbourg, D. -- Diarra, C. -- Dorangeville, F. -- Edelbruck, P. -- Grave, X. -- Guevara, L. -- Harroch, H. -- Ky, B. Y. -- Lavergne, L. -- Lefebvre, F. -- Lermitage, A. -- Olariu, A. -- Oziol, C. -- Petrache, C. -- Pouthas, J. -- Salomon, F. -- Tanguy, S. -- Tun-Lanoe, K. M. M.] Univ Paris 11, CNRS, IN2P3, IPNO, F-91406 Orsay, France -- [Aufranc, C. -- Baulieu, G. -- Doan, Q. T. -- Pugnere, D. -- Redon, N. -- Rosse, B. -- Stezowski, O.] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France -- [Austin, A. -- Burrows, I. -- Coleman-Smith, P. J. -- Griffiths, R. -- Kogimtzis, M. -- Labiche, M. -- Lazarus, I. H. -- Letts, S. C. -- Morrall, P. S. -- Palin, J. -- Pucknell, V. F. E. -- Simpson, J. -- Strachan, J.] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England -- [Aydin, S. -- Bazzacco, D. -- Bellato, M. -- Bortolato, D. -- Chavas, J. -- Colombo, A. -- Fanin, C. -- Farnea, E. -- Isocrate, R. -- Kroell, Th. -- Lenzi, S. M. -- Lunardi, S. -- Marginean, R. -- Menegazzo, R. -- Mengoni, D. -- Michelagnoli, C. -- Nespolo, M. -- Nicoletto, M. -- Peghin, R. -- Ramina, L. -- Rampazzo, G. -- Rebeschini, M. -- Recchia, F. -- Rossi Alvarez, C. -- Salvato, G. -- Triossi, A. -- Turcato, M. -- Ur, C. A. -- Venturelli, R. -- Veronese, F.] Ist Nazl Fis Nucl, Sez Padova, IT-35131 Padua, Italy -- [Balabanski, D. L. -- Detistov, P. -- Petkov, P. -- Stefanova, E.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria -- [Bednarczyk, P. -- Czermak, A. -- Dulny, B. -- Grebosz, J. -- Maj, A. -- Meczynski, W. -- Sowicki, B. -- Zieblinski, M.] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland -- [Bentley, M. A. -- Bloor, D. -- Joshi, P. -- Wadsworth, R.] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England -- [Benzoni, G. -- Blasi, N. -- Boiano, C. -- Bracco, A. -- Brambilla, S. -- Camera, F. -- Capsoni, A. -- Casati, G. -- Coelli, S. -- Corsi, A. -- Cortesi, A. -- Crespi, F. C. L. -- Geraci, A. -- Giaz, A. -- Leoni, S. -- Million, B. -- Montanari, D. -- Nicolini, R. -- Pellegri, L. -- Pignanelli, M. -- Pullia, A. -- Riboldi, S. -- Ripamonti, G. -- Tomasi, F. -- Vandone, V. -- Viscione, E. -- Wieland, O. -- Zocca, F.] Ist Nazl Fis Nucl, Sez Milano, IT-20133 Milan, Italy -- [Berthier, R. -- Bouty, A. -- Broussard, S. -- Buerger, A. -- Drouen, Y. -- Gros, P. -- Goergen, A. -- Hervieu, B. -- Karolak, M. -- Kebbiri, M. -- Korten, W. -- Ljungvall, J. -- Lotode, A. -- Mariette, Y. -- Le Noa, Y. -- Obertelli, A. -- Le Pouhalec, P. -- Salsac, M. -D. -- Theisen, Ch. -- Touzery, R. -- Veyssiere, Ch.] CEA, Ctr Saclay, IRFU, F-91191 Gif Sur Yvette, France -- [Beunard, R. -- Bourgault, P. -- Cahan, B. -- Clement, E. -- de France, G. -- Legeard, L. -- Ozille, M. -- Pancin, J. -- Raine, R. -- Ropert, J. -A. -- Saillant, F. -- Tripon, M. -- Wittwer, G.] CEA DSM CNRS IN2P3, GANIL, F-14076 Caen, France -- [Birkenbach, B. -- Bruyneel, B. -- Eberth, J. -- Hess, H. -- Jolie, J. -- Lersch, D. -- Pascovici, G. -- Reiter, P. -- Warr, N. -- Weisshaar, D. -- Wiens, A.] Univ Cologne, IKP, D-50937 Cologne, Germany -- [Bizzeti, P. G. -- Bizzeti-Sona, A. M. -- Giannatiempo, A. -- Melon, B. -- Perego, A. -- Sona, P.] Univ Florence, Dipartimento Fis & Astron, IT-50019 Florence, Italy -- [Bizzeti, P. G. -- Bizzeti-Sona, A. M. -- Giannatiempo, A. -- Melon, B. -- Nannini, A. -- Perego, A. -- Sona, P.] Ist Nazl Fis Nucl, Sez Firenze, IT-50019 Florence, Italy -- [Blasco, J. M. -- Carrio, F. -- Egea, J. -- Gonzalez, V. -- Sanchis, E.] Univ Valencia, Dept Elect Engn, E-46100 Burjassot, Valencia, Spain -- [Borsato, M. -- Bortolato, D. -- Lenzi, S. M. -- Lunardi, S. -- Marginean, R. -- Mengoni, D. -- Michelagnoli, C. -- Nespolo, M. -- Recchia, F. -- Salvato, G. -- Triossi, A. -- Venturelli, R.] Univ Padua, Dipartimento Fis, IT-35131 Padua, Italy -- [Bracco, A. -- Camera, F. -- Corsi, A. -- Crespi, F. C. L. -- Giaz, A. -- Leoni, S. -- Montanari, D. -- Nicolini, R. -- Pellegri, L. -- Pignanelli, M. -- Pullia, A. -- Riboldi, S. -- Vandone, V.] Univ Milan, Dipartimento Fis, IT-20133 Milan, Italy -- [Brawn, I. P.] STFC Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England -- [Brondi, A. -- Moro, R. -- La Rana, G. -- Vardaci, E.] Univ Naples Federico II, Dipartimento Fis, IT-80126 Naples, Italy -- [Brondi, A. -- Moro, R. -- La Rana, G. -- Vardaci, E.] Ist Nazl Fis Nucl, Sez Napoli, IT-80126 Naples, Italy -- [Bucurescu, D. -- Marginean, N. -- Marginean, R. -- Petcu, M. -- Ur, C. A.] Natl Inst Phys & Nucl Engn, Bucharest, Romania -- [Buerger, A. -- Suliman, G. -- Zamfir, N. V.] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany -- [Buerger, A.] Univ Oslo, Dept Phys, N-0316 Oslo, Norway -- [Casati, G. -- Geraci, A. -- Ripamonti, G.] Politecn Milan, Dipartimento Elettron & Informaz, IT-20133 Milan, Italy -- [Castoldi, M. -- Zucchiatti, A.] Ist Nazl Fis Nucl, Sez Genova, IT-16146 Genoa, Italy -- [Chapman, R. -- Mengoni, D. -- Orlandi, R. -- Smith, J. F.] Univ W Scotland, Sch Engn, Paisley PA1 2BE, Renfrew, Scotland -- [Cullen, D. M. -- Robinson, A. P.] Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England -- [Depalo, R.] Univ Padua, Dipartimento Astron, IT-35131 Padua, Italy -- [Descombes, T. -- Simpson, G.] Univ Grenoble 1, CNRS, IN2P3, LPSC,INP Grenoble, F-38026 Grenoble, France -- [Doncel, M. -- Hernandez-Prieto, A. -- Quintana, B.] Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca, Spain -- [Erduran, M. N. -- Ince, E.] Istanbul Univ, Istanbul, Turkey -- [Erturk, S.] Nigde Univ, Fac Sci, Dept Phys, TR-51200 Nigde, Turkey -- [Gast, W. -- Lieder, R. M. -- Mihailescu, L.] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany -- [Gernhaeuser, R. -- Klupp, S. -- Kruecken, R. -- Schlarb, M.] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany -- [Jaworski, G.] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland -- [Jaworski, G. -- Mierzejewski, J. -- Palacz, M.] Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland -- [Jones, P.] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland -- [Jonson, B.] Chalmers, S-41296 Gothenburg, Sweden -- [Jungclaus, A. -- Orlandi, R.] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain -- [Kempley, R. S. -- Podolyak, Z. -- Regan, P. H. -- Walker, P. M.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England -- [Mitev, K. -- Rainovski, G.] Sofia Univ St Kliment Ohridski, Fac Phys, Sofia, Bulgaria -- [Ozben, C.] Istanbul Tech Univ, TR-80626 Istanbul, Turkey -- [Rudolph, D.] Lund Univ, Dept Phys, SE-22100 Lund, Sweden, Research Group: Information Management, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), informatique, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM MECA, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), CSNSM INFOR, CSNSM ELEC, Matière Nucléaire, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), AGATA, Akkoyun, S., Algora, A., Alikhani, B., Ameil, F., De Angelis, G, Arnold, L., Astier, A., Ataç, A., Aubert, Y., Aufranc, C., Austin, A., Aydin, S., Azaiez, F., Badoer, S., Balabanski, D. L., Barrientos, D., Baulieu G., L, Baumann, R., Bazzacco, D., Beck, F. A., Beck, T., Bednarczyk, P., Bellato, M., Bentley, M. A., Benzoni, G., Berthier, R., Berti, L., Beunard, R., Lo Bianco, G., Birkenbach, B., Bizzeti, P. G., Bizzeti Sona, A. M., Le Blanc, F., Blasco, J. M., Blasi, N., Bloor, D., Boiano, C., Borsato, M., Bortolato, D., Boston, A. J., Boston, H. C., Bourgault, P., Boutachkov, P., Bouty, A., Bracco, A., Brambilla, S., Brawn, I. P., Brondi, Augusto, Broussard, S., Bruyneel, B., Bucurescu, D., Burrows, I., Bürger, A., Cabaret, S., Cahan, B., Calore, E., Camera, F., Capsoni, A., Carrió, F., Casati, G., Castoldi, M., Cederwall, B., Cercus J., L, Chambert, V., El Chambit, M., Chapman, R., Charles, L., Chavas, J., Clément, E., Cocconi, P., Coelli, S., Coleman Smith, P. J., Colombo, A., Colosimo, S., Commeaux, C., Conventi, D., Cooper, R. J., Corsi, A., Cortesi, A., Costa, L., Crespi, F. C. L., Cresswell, J. R., Cullen, D. M., Curien, D., Czermak, A., Delbourg, D., Depalo, R., Descombes, T., Désesquelles, P., Detistov, P., Diarra, C., Didierjean, F., Dimmock, M. R., Doan, Q. T., Domingo Pardo, C., Doncel, M., Dorangeville, F., Dosme, N., Drouen, Y., Duchêne, G., Dulny, B., Eberth, J., Edelbruck, P., Egea, J., Engert, T., Erduran, M. N., Ertürk, S., Fanin, C., Fantinel, S., Farnea, E., Faul, T., Filliger, M., Filmer, F., Finck, C., De France, G., Gadea, A., Gast, W., Geraci, A., Gerl, J., Gernhäuser, R., Giannatiempo, A., Giaz, A., Gibelin, L., Givechev, A., Goel, N., González, V., Gottardo, A., Grave, X., Grȩbosz, J., Griffiths, R., Grint, A. N., Gros, P., Guevara, L., Gulmini, M., Görgen, A., Ha, H. T. M., Habermann, T., Harkness, L. J., Harroch, H., Hauschild, K., He, C., Hernández Prieto, A., Hervieu, B., Hess, H., Hüyük, T., Ince, E., Isocrate, R., Jaworski, G., Johnson, A., Jolie, J., Jones, P., Jonson, B., Joshi, P., Judson, D. S., Jungclaus, A., Kaci, M., Karkour, N., Karolak, M., Kaşkaş, A., Kebbiri, M., Kempley, R. S., Khaplanov, A., Klupp, S., Kogimtzis, M., Kojouharov, I., Korichi, A., Korten, W., Kröll, T., Krücken, R., Kurz, N., Ky, B. Y., Labiche, M., Lafay, X., Lavergne, L., Lazarus, I. H., Leboutelier, S., Lefebvre, F., Legay, E., Legeard, L., Lelli, F., Lenzi, S. M., Leoni, S., Lermitage, A., Lersch, D., Leske, J., Letts, S. C., Lhenoret, S., Lieder, R. M., Linget, D., Ljungvall, J., Lopez Martens, A., Lotodé, A., Lunardi, S., Maj, A., Van Der Marel, J., Mariette, Y., Marginean, N., Marginean, R., Maron, G., Mather, A. R., Mȩczyński, W., Mendéz, V., Medina, P., Melon, B., Menegazzo, R., Mengoni, D., Merchan, E., Mihailescu, L., Michelagnoli, C., Mierzejewski, J., Milechina, L., Million, B., Mitev, K., Molini, P., Montanari, D., Moon, S., Morbiducci, F., Moro, RENATA EMILIA MARIA, Morrall, P. S., Möller, O., Nannini, A, Napoli, D. R., Nelson, L., Nespolo, M., Ngo, V. L., Nicoletto, M., Nicolini, R., Le Noa, Y., Nolan, P. J., Norman, M., Nyberg, J., Obertelli, A., Olariu, A., Orlandi, R., Oxley, D. C., Özben, C., Ozille, M., Oziol, C., Pachoud, E., Palacz, M., Palin, J., Pancin, J., Parisel, C., Pariset, P., Pascovici, G., Peghin, R., Pellegri, L., Perego, A., Perrier, S., Petcu, M., Petkov, P., Petrache, C., Pierre, E., Pietralla, N., Pietri, S., Pignanelli, M., Piqueras, I., Podolyak, Z., Le Pouhalec, P., Pouthas, J., Pugnére D., L, Pucknell, V. F. E., Pullia, A., Quintana, B., Raine, R., Rainovski, G., Ramina, L., Rampazzo, G., LA RANA, Giovanni, Rebeschini, M., Recchia, F., Redon N., L, Reese M., C, Reiter, P., Regan, P. H., Riboldi, S., Richer, M., Rigato, M., Rigby, S., Ripamonti, G., Robinson, A., Robin, J., Roccaz, J., Ropert, J. A., Rossé, B. l., Rossi Alvarez, C., Rosso, D., Rubio, B., Rudolph, D., Saillant, F., Şahin, E., Salomon, F., Salsac, M. D., Salt, J., Salvato, G., Sampson, J., Sanchis, E., Santos, C., Schaffner, H., Schlarb, M., Scraggs, D. P., Seddon, D., Şenyiǧit, M., Sigward, M. H., Simpson, G., Simpson, J., Slee, M., Smith, J. F., Sona, P., Sowicki, B., Spolaore, P., Stahl, C., Stanios, T., Stefanova, E., Stézowski, O., Strachan, J., Suliman, G., Söderström, P. A., Tain, J. L., Tanguy, S., Tashenov, S., Theisen, C. h., Thornhill, J., Tomasi, F., Toniolo, N., Touzery, R., Travers, B., Triossi, A., Tripon, M., Tun Lanoë, K. M. M., Turcato, M., Unsworth, C., Ur, C. A., Valiente Dobon, J. J., Vandone, V., Vardaci, Emanuele, Venturelli, R., Veronese, F., Veyssiere, C., Viscione, E., Wadsworth, R., Walker, P. M., Warr, N., Weber, C., Weisshaar, D., Wells, D., Wieland, O., Wiens A., U, Wittwer, G., Wollersheim, H. J., Zocca, F., Zamfir, N. V., Ziȩbliński, M., Zucchiatti, A., Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), and 0-Belirlenecek
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Pulse-shape and gamma-ray tracking algorithms, FOS: Physical sciences, Semiconductor detector performance and simulations, Integrated circuit, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Tracking (particle physics), gamma-Ray tracking, 01 natural sciences, Pulse-shape and γ-ray tracking algorithms, law.invention, Data acquisition, law, 0103 physical sciences, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, γ-Ray spectroscopy, Nuclear Experiment, Instrumentation, Digital signal processing, Event reconstruction, gamma-Ray spectroscopy, Physics, sezele, Spectrometer, Spectrometers, 010308 nuclear & particles physics, business.industry, Detector, AGATA, Digital signals, HPGe detectors, Pulse-shape, Ray tracking, HPGe detectors, Algorithms, Crystals, Germanium, Semiconductor detectors, Signal processing, Spectrometry, Tracking (position), γ-Ray tracking, Instrumentation and Detectors (physics.ins-det), AGATA, Física nuclear, business, Computer hardware
Abstract: WOS: 000300864200005, The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realisation of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterisation of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximise its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer. (C) 2011 Elsevier B.V. All rights reserved., EU [RII3-CT-2004-506065]; German BMBF [06K-167, 06KY2051]; Swedish Research Council; Knut and Alice Wallenberg Foundation; UK EPSRC Engineering and Physical Sciences Research Council; UK STFC Science and Technology Facilities Council; AWE plc; Scientific and Technological Research Council of Turkey [106T055]; Ankara University [05B4240002]; Polish Ministry of Science and Higher Education [DPN/N190/AGATA/2009]; Spanish MICINN [FPA2008-06419, FPA2009-13377-C02-02]; Spanish Consolider-Ingenio Programme CPAN [CSD2007-00042]; Generalitat Valenciana [PROMETEO/2010/101]; MICINN, Spain; INFN, Italy [AIC10-D-000568]; Science and Technology Facilities Council [ST/F012039/1, ST/J000094/1, ST/F004192/1, ST/J000159/1, ST/I504940/1, NuSTAR, ST/F006950/1, ST/I504916/1, ST/G000670/1, ST/F004060/1, ST/J000051/1, ST/J000108/1, ST/G000670/1 NuSTAR, ST/I504959/1, ST/G000727/1, ST/F004052/1, ST/F004184/1], AGATA and this work is supported by the European funding bodies and the EU Contract RII3-CT-2004-506065, the German BMBF under Grants 06K-167 and 06KY2051, the Swedish Research Council and the Knut and Alice Wallenberg Foundation, UK EPSRC Engineering and Physical Sciences Research Council, UK STFC Science and Technology Facilities Council, AWE plc, Scientific and Technological Research Council of Turkey (Proj. nr. 106T055) and Ankara University (BAP Proj. nr. 05B4240002), the Polish Ministry of Science and Higher Education under Grant DPN/N190/AGATA/2009, the Spanish MICINN under grants FPA2008-06419 and FPA2009-13377-C02-02, the Spanish Consolider-Ingenio 2010 Programme CPAN (contract number CSD2007-00042) the Generalitat Valenciana under Grant PROMETEO/2010/101, and research performed in the frame of the GSI-IN2P3 collaboration agreement number 02-42. A. Gadea and E. Farnea acknowledge the support of MICINN, Spain, and INFN, Italy, through the AIC10-D-000568 bilateral action.
Published: 2012
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