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82 results on '"A. Ordine"'

1. The FAZIA setup: A review on the electronics and the mechanical mounting

Author

F. Gramegna, M.F. Rivet, M. Falorsi, A. Zucchini, R. Revenko, J.D. Frankland, F. Saillant, J. Ropert, H. de Préaumont, S. Serra, Silvia Piantelli, P. Lecomte, J. A. Dueñas, D. Dell'Aquila, Y. Merrer, A. Chbihi, O. Lopez, N. Le Neindre, M. Pârlog, L. Grassi, G. Pastore, Giacomo Poggi, E. Vient, G. Mantovani, E. Scarlini, Gabriele Pasquali, M. Henri, G. Tortone, Alessandro Olmi, C. Maiolino, Giovanni Casini, Giuseppe Verde, C. Pain, P. Edelbruck, Eric Bonnet, Marek Palka, G. Spadaccini, A. Ordine, D. Fabris, R. Giordano, A. Buccola, C. Ciampi, Domenico Santonocito, E. Galichet, Tomasz Kozik, Krzysztof Korcyl, A. Camaiani, Elio Rosato, Andrea Stefanini, M. Kajetanowicz, B. Bougard, T. Marchi, A. Margotti, Mariano Vigilante, F. Salomon, A. Boiano, M. Cinausero, C. Frosin, R. Bougault, Simone Valdré, R. Alba, A. Richard, C. Soulet, Diego Gruyer, Luca Morelli, G. Brulin, Magda Cicerchia, E. Wanlin, P. Desrues, M. Bruno, I. Lombardo, M. Guerzoni, S. Upadhyaya, Maurizio Bini, A.J. Kordyasz, G. Wittwer, A. Vanzanella, P. Ottanelli, G. Tobia, Sandro Barlini, B. Borderie, Valdre, S., Casini, G., Le Neindre, N., Bini, M., Boiano, A., Borderie, B., Edelbruck, P., Poggi, G., Salomon, F., Tortone, G., Alba, R., Barlini, S., Bonnet, E., Bougard, B., Bougault, R., Brulin, G., Bruno, M., Buccola, A., Camaiani, A., Chbihi, A., Ciampi, C., Cicerchia, M., Cinausero, M., Dell'Aquila, D., Desrues, P., Duenas, J. A., Fabris, D., Falorsi, M., Frankland, J. D., Frosin, C., Galichet, E., Giordano, R., Gramegna, F., Grassi, L., Gruyer, D., Guerzoni, M., Henri, M., Kajetanowicz, M., Korcyl, K., Kordyasz, A., Kozik, T., Lecomte, P., Lombardo, I., Lopez, O., Maiolino, C., Mantovani, G., Marchi, T., Margotti, A., Merrer, Y., Morelli, L., Olmi, A., Ordine, A., Ottanelli, P., Pain, C., Palka, M., Parlog, M., Pasquali, G., Pastore, G., Piantelli, S., de Preaumont, H., Revenko, R., Richard, A., Rivet, M. F., Ropert, J., Rosato, E., Saillant, F., Santonocito, D., Scarlini, E., Serra, S., Soulet, C., Spadaccini, G., Stefanini, A. A., Tobia, G., Upadhyaya, S., Vanzanella, A., Verde, G., Vient, E., Vigilante, M., Wanlin, E., Wittwer, G., Zucchini, A., 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), Institut de Physique Nucléaire d'Orsay (IPNO), 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 des technologies associées (SUBATECH), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-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), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), 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), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, data acquisition, Telescope array, Nuclear physics, Measure (physics), FOS: Physical sciences, FAZIA, Heavy-ion reaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Front end electronics, Data acquisition, nuclear physics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electronics, Nuclear Experiment (nucl-ex), heavy-ion reactions, 010306 general physics, Nuclear Experiment, Instrumentation, TRACE (psycholinguistics), Physics, 010308 nuclear & particles physics, 29.40.Wk, Instrumentation and Detectors (physics.ins-det), 29.85.Ca, front-end electronics, Heavy-ion reactions, Front-end electronics, telescope array, Nuclear physic, Systems engineering, Front-end electronic
Abstract

In this paper the technological aspects of the FAZIA array will be explored. After a productive commissioning phase, FAZIA blocks started to measure and give very useful data to explore the physics of Fermi energy heavy-ion reactions. This was possible thanks to many technical measures and innovations developed in the commissioning phase and tuned during the first experimental campaigns. This paper gives a detailed description of the present status of the FAZIA setup from the electronic and mechanical point of view, trying also to trace a path for new improvements and refinements of the apparatus., 17 pages, 9 figures

Published
2019
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2. Evaporation and fission decay of Er 158 composite nuclei within the statistical model

Author

P. N. Nadtochy, D. Pierroutsakou, G. La Rana, N. Gelli, A. Di Nitto, C. Parascandolo, A. Pulcini, A. Ordine, A. Boiano, M. Cinausero, F. Davide, G. N. Knyazheva, E. M. Kozulin, G. Prete, Emanuele Vardaci, Di Nitto, A., Vardaci, E., La Rana, G., Nadtochy, P. N., Boiano, A., Cinausero, M., Prete, G., Gelli, N., Kozulin, E. M., Knyazheva, G. N., Ordine, A., Davide, F., Parascandolo, C., Pierroutsakou, D., and Pulcini, A.

Subjects
Physics, Proton, 010308 nuclear & particles physics, Fission, Nuclear Theory, Order (ring theory), Observable, 01 natural sciences, Charged particle, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Excitation, Energy (signal processing)
Abstract

Light charged particles emitted by the compound nucleus $^{158}\mathrm{Er}$ produced in the reaction $^{32}\mathrm{S}$ $(180 \mathrm{MeV})+^{126}\mathrm{Te}$, at the excitation energy ${E}_{x}=92$ MeV, have been measured at Laboratori Nazionali di Legnaro in coincidence with fission fragments and evaporation residues. The $4\ensuremath{\pi}$ detector array $8\ensuremath{\pi}\mathrm{LP}$ coupled to a system of parallel-plate avalanche counters to detect evaporation residues has been used. Data have been analyzed in the framework of the statistical model of evaporation with the code pace2_n11. This enlarged version of the code pace2 has been used to reproduce the large set of observables measured in the fusion-evaporation and fusion-fission channels along with experimental prescission neutron multiplicity and fission cross section taken from literature. It is found that the simultaneous reproduction of the prescission neutron, proton, and $\ensuremath{\alpha}$-particle multiplicities can be obtained with zero fission delay without dynamical effects. However, the same set of model input parameters does not allow us to reproduce proton and $\ensuremath{\alpha}$-particle multiplicities in the evaporation channel. Extensive calculations, with different sets of parameters, show the limits of the statistical model in reproducing the whole set of data. This work evidences the importance of measuring a large set of observables in order to obtain a reliable description of the decay of the compound nucleus, and in particular of the fission process.

Published
2020

3. OSCAR: A new modular device for the identification and correlation of low energy particles

Author

A. Chbihi, N. Le Neindre, J.D. Frankland, A. Ordine, E. Bonnet, S. Valdrè, A. Camaiani, R. Bougault, M. Parlog, Q. Faible, D. Dell'Aquila, B. Borderie, Luca Morelli, A.J. Kordyasz, Giovanni Casini, Giuseppe Verde, Andrea Stefanini, D. Fabris, Tomasz Kozik, I. Lombardo, Tommaso Marchi, Giovanni Ausanio, L. Augey, Silvia Piantelli, E. Vient, Gabriele Pasquali, M. Bruno, R. LaTorre, G. Tortone, Domenico Santonocito, P. Ottanelli, Mariano Vigilante, R. Alba, M De Luca, Miguel A. Miranda, G. Pastore, Sandro Barlini, L. Francalanza, Diego Gruyer, Magda Cicerchia, L. Grassi, O. Lopez, M. Cinausero, F. Gramegna, Institut de Physique Nucléaire d'Orsay (IPNO), 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 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), 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), Dell'Aquila, D., Lombardo, I., Verde, G., Vigilante, M., Ausanio, G., Ordine, A., Miranda, M., De Luca, M., Alba, R., Augey, L., Barlini, S., Bonnet, E., Borderie, B., Bougault, R., Bruno, M., Camaiani, A., Casini, G., Chbihi, A., Cicerchia, M., Cinausero, M., Fabris, D., Faible, Q., Francalanza, L., Frankland, J. D., Grassi, L., Gramegna, F., Gruyer, D., Kordyasz, A. J., Kozik, T., Latorre, R., Le Neindre, N., Lopez, O., Marchi, T., Morelli, L., Ottanelli, P., Parlog, M., Pastore, G., Pasquali, G., Piantelli, S., Santonocito, D., Stefanini, A. A., Tortone, G., Valdrè, S., Vient, E., 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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 and High Energy Physics, Work (thermodynamics), Photon, Nuclear physics detectors, particle identification, thin silicon detectors, 01 natural sciences, Spectral line, ion channeling, Nuclear physics, Modular detectors, Hodoscope, 0103 physical sciences, Isospin dynamics, Thin silicon detectors, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment, Instrumentation, silicon uniformity, ComputingMilieux_MISCELLANEOUS, Nuclear and High Energy Physic, Physics, 010308 nuclear & particles physics, Detector, Low identification thresholds, Modular detector, Isospin, modular detectors, Ion channeling, Low identification threshold, low identification thresholds, Silicon uniformity, isospin dynamics, Transport phenomena, Isospin dynamic, Energy (signal processing), Thin silicon detector
Abstract

A new modular and high versatility hodoscope , OSCAR, has been developed and characterized. The aim of this hodoscope is to work as an ancillary detector of present large acceptance heavy ion detectors in specific angular regions where low thresholds and high granularities are needed. We discuss the capabilities of OSCAR in the Δ E–E identification of very low energy light particles, providing a precise map of the thickness uniformity of the Δ E (SSSSD, 20 μ m ) stage and showing how the thickness gradient affects the identification of particles. Energy spectra of light identified particles produced in Ca+Ca collisions at 35 AMeV are used to investigate isospin transport phenomena involving the emission of low energy particles from the quasi-target (QT) source in semi-peripheral nuclear collisions. The possibility to explore particle–particle correlations are also discussed.

Published
2018
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4. The α-decay of the Hoyle state in 12C: a new high- precision investigation

Author

L. Lamia, C. Agodi, A. Tumino, G. Spadaccini, A. Ordine, G. G. Rapisarda, G. D’ Agata, C. Spitaleri, S. Romano, Giuseppe Verde, Daniele Carbone, A. Cvetinović, S. M. R. Puglia, Manuela Cavallaro, R. G. Pizzone, Luis Acosta, Roberta Spartà, I. Lombardo, G. Santagati, L. Francalanza, Mariano Vigilante, D. Dell' Aquila, M. Gulino, G. L. Guardo, M. La Cognata, S. Cherubini, Francesco Cappuzzello, I. Indelicato, Spitaleri, C., Dell‘aquila, D., Lombardo, I., Verde, G., Vigilante, M., Acosta, L., Agodi, C., Cappuzzello, F., Carbone, D., Cavallaro, M., Cherubini, S., Cvetinovic, A., D‘agata, G., Francalanza, L., Guardo, G. L., Gulino, M., Indelicato, I., La Cognata, M., Lamia, L., Ordine, A., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Santagati, G., Spartà, R., Spadaccini, G., and Tumino, A.

Subjects
Physics, Light nucleus, 010308 nuclear & particles physics, Component (thermodynamics), QC1-999, State (functional analysis), Nuclear Structure, Nuclear Clustering, Light nuclei, 01 natural sciences, Nuclear physics, Reaction rate, Physics and Astronomy (all), Stars, Nucleosynthesis, 0103 physical sciences, Cluster (physics), 010306 general physics, Ground state
Abstract

The αdecay path of the Hoyle state in 12C (Ex = 7:654MeV) represents one ofthe most challenging questions of modern nuclear physics. Its knowledge can help in theunderstanding of cluster configurations in light nuclei and the possible existence of Bose-Einstein condensates in nuclei. In stars, it is involved in the so-called 3αprocess, wherethe 12C nucleosynthesis occurs. We studied the 14N(d; α2)12C(7:654) reaction at 10:5MeVincident energy to probe its direct decay component. We found, with a precision higherof a factor 5 than any other previous experiment, an almost total absence of direct decaysby-passing the ground state of 8Be. From our analysis, a new upper limit of such decayis found at 0:043% (95% C.L.). Astrophysical 3α process reaction rate calculations haveto be accordingly revised.

Published
2018

5. Investigation of the Hoyle state in$^{12}$C with a new hodoscope detector

Author

Daniele Carbone, A. Cvetinović, C. Agodi, A. Ordine, M De Luca, M. Cavallaro, Luis Acosta, Silvio Cherubini, I. Indelicato, G. Santagati, Roberta Spartà, M. La Cognata, G. G. Rapisarda, R. G. Pizzone, Giuseppe Verde, M. Gulino, Giuseppe D’Agata, Livio Lamia, Mariano Vigilante, C. Spitaleri, S. Romano, L. Francalanza, Francesco Cappuzzello, D Dell’Aquila, G. L. Guardo, S. M. R. Puglia, A. Tumino, Ivano Lombardo, Institut de Physique Nucléaire d'Orsay (IPNO), 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), Dell'Aquila, D., Lombardo, I., Vigilante, M., De Luca, M., Acosta, L., Agodi, C., Cappuzzello, F., Carbone, D., Cavallaro, M., Cherubini, S., Cvetinovic, A., D'Agata, G., Francalanza, L., Guardo, G. L., Gulino, M., Indelicato, I., La Cognata, M., Lamia, L., Ordine, A., Pizzone, R., Puglia, S., Rapisarda, G., Romano, S., Santagati, G., Spartà, R., Spitaleri, C., Tumino, A., and Verde, G.

Subjects
Physics, History, 010308 nuclear & particles physics, Detector, Clustering phenomena, Decay mechanisms, Structure property, Silicon detectors, State (functional analysis), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Nuclear physics, Physics and Astronomy (all), Hodoscope, 0103 physical sciences, 010306 general physics
Abstract

International audience; The ${0}_{2}^{+}$ state in(12)C (7.654MeV, the Hoyle state) is important for the understanding of clustering phenomena in nuclei. The pronounced cluster nature of this state allows the triple-α process in stars with a reaction rate regulated by its structure properties. To precisely estimate the direct component in the 3α decay mechanism of the Hoyle state, we developed a new experiment using the(14)N(d,α)(12)C reaction at 10.5MeV. An anti-coincidence telescope was used to identify the α ejectiles leading the residual(12)C in the Hoyle state, while its decays in 3α were studied by means of a new hodoscope of silicon detectors, superOSCAR, placed in kinematical coincidence to fully reconstruct the events. Details of the experiment and preliminary results are discussed in the text.

Published
2017
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6. A new high-precision upper limit of direct α-decays from the Hoyle state in12C

Author

Giuseppe Verde, C. Spitaleri, Silvio Cherubini, S. Romano, G. Spadaccini, M. Gulino, Giuseppe D’Agata, Luis Acosta, G. L. Guardo, C. Agodi, D. Dell'Aquila, Livio Lamia, A. Tumino, G. Santagati, Roberta Spartà, Manuela Cavallaro, Daniele Carbone, A. Cvetinović, Mariano Vigilante, S. M. R. Puglia, I. Indelicato, Ivano Lombardo, M. La Cognata, Francesco Cappuzzello, R. G. Pizzone, A. Ordine, L. Francalanza, G. G. Rapisarda, Dell'Aquila, D., La Cognata, M., Lombardo, I., Verde, G., Vigilante, M., Acosta, L., Agodi, C., Cappuzzello, F., Carbone, D., Cavallaro, M., Cherubini, S., Cvetinovic, A., D'Agata, G., Francalanza, L., Guardo, G. L., Gulino, M., Indelicato, I., Lamia, L., Ordine, A., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Santagati, G., Spartà, R., Spadaccini, G., Spitaleri, C., Tumino, A., Institut de Physique Nucléaire d'Orsay (IPNO), 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), and 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)

Subjects
Physics, 010308 nuclear & particles physics, QC1-999, State (functional analysis), Nuclear Structure, Nuclear Clustering, Light nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Reaction rate, Stars, Physics and Astronomy (all), Nucleosynthesis, 0103 physical sciences, Cluster (physics), Incident energy, Limit (mathematics), 010306 general physics, Ground state
Abstract

International audience; The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised.

Published
2017
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7. Toward a reassessment of the 19 F(p, α0) 16 O reaction rate at astrophysical temperatures

Author

M. Romoli, I. Lombardo, A. Tumino, A. Ordine, G. Spadaccini, M. La Commara, C. Spitaleri, Elio Rosato, D. Dell'Aquila, M. La Cognata, A. Di Leva, V. Rigato, I. Indelicato, and Mariano Vigilante

Subjects
Nuclear physics, Physics, Nuclear reaction, Reaction rate, Nuclear and High Energy Physics, Stars, chemistry, Fundamental physics, Nuclear astrophysics, Fluorine, chemistry.chemical_element
Abstract

The 19 F(p, α 0 ) 16 O reaction at low energies plays an important role in fundamental physics. In particular in nuclear astrophysics it represents, together with the 19 F(p, γ ) 20 Ne reaction, the crossing point between the CNO and the NeNa cycles in stars. Further, in hydrogen-rich stellar environments, it is the most important fluorine destruction channel. In this paper we report new measurements on the 19 F(p, α 0 ) 16 O reaction at deeply sub-Coulomb energies (0.2–0.6 MeV), a region where, despite the key role of this reaction, very few and old data are reported. The deduced astrophysical S -factor is ≈ 1.5 – 2 times larger than currently adopted extrapolations with possibly important astrophysical consequences.

Published
2015
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8. Recoil separator ERNA: acceptances in angle and energy

Author

Gianluca Imbriani, A. Ordine, H. P. Trautvetter, Marialuisa Aliotta, Filippo Terrasi, Lucio Gialanella, Frank Strieder, N. DeCesare, J. Kluge, Detlef Rogalla, H. Röcken, D. Schürmann, Mario R. Romano, Carmine Lubritto, A. DiLeva, Vincenzo Roca, Antonio D'Onofrio, C. Rolfs, F. Schümann, D., Rogalla, D., Schürmann, F., Strieder, M., Aliotta, N., Decesare, DI LEVA, Antonino, C., Lubritto, A., D’Onofrio, L., Gialanella, Imbriani, Gianluca, J., Kluge, A., Ordine, Roca, Vincenzo, H., Röcken, C., Rolf, Romano, Mario, F., Schümann, F., Terrasi, H. P., Trautvetter, Rogalla, D, Schurmann, D, Strieder, F, Aliotta, M, Di Leva, A, Lubritto, Carmine, De Cesare, N, D'Onofrio, Antonio, Gialanella, Lucio, Imbriani, G, Klug, J, Ordine, A, Roca, V, Rocken, H, Rolfs, C, Romano, M, Schumann, F, Terrasi, Filippo, and Trauttvetter, H. P.

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Electromagnetic radiation, Recoil separator, Nuclear physics, Cross section (physics), Nuclear Astrophysics, Atomic physics, Experimental nuclear physic, Nuclear Experiment, Dynamitron, Instrumentation, Energy (signal processing), Beam (structure), Oxygen-16
Abstract

For improved cross-section measurements of the reaction 12C(α,γ)16O in inverted kinematics, a recoil separator ERNA is developed at the 4MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. Due to the emission of the capture γ-rays, the kinematically forward directed 16O recoils are described by an angle and energy spread. Thus, the acceptances in angle and energy of ERNA must cover these spreads in order to extract reliable cross-section values. We report on such acceptance measurements over the energy range Ecm=0.7-5.0 MeV, using an 16O pilot beam. © 2003 Elsevier B.V. All rights reserved.

Published
2003
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9. The E1 capture amplitude in 12C(α,γ0) 16O

Author

F. Strieder, Antonio D'Onofrio, A. Ordine, Marialuisa Aliotta, Filippo Terrasi, C. Agodi, Detlef Rogalla, G. Gyürki, L. Gialanella, E. Somorjai, Vincenzo Roca, L. Campajola, Gianluca Imbriani, P. Figuera, Mario R. Romano, H. P. Trautvetter, S. Theis, Uwe Greife, A. Del Zoppo, C. Rolfs, R. Alba, F. Schümann, Paolo Sapienza, Carlo Sabbarese, Gialanella, L., Rogalla, D., Strieder, F., Theis, S., Gyurki, G., Agodi, C., Alba, R., Aliotta, M., Campajola, L., Del Zoppo, A., D'Onofrio, A., Figuera, P., Greife, U., Imbriani, G., Ordine, A., Roca, V., Rolfs, C., Romano, M., Sabbarese, C., Sapienza, P., Schumann, F., Somorjai, E., Terrasi, F., Trautvetter, H. P., L., Gialanella, D., Rogalla, F., Strieder, S., Thei, G., Gyürki, C., Agodi, R., Alba, M., Aliotta, L., Campajola, A., Del Zoppo, A., D'Onofrio, P., Figuera, U., Greife, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, P., Sapienza, F., Schümann, E., Somorjai, F., Terrasi, and H. P., Trautvetter

Subjects
Physics, Excitation function, Nuclear and High Energy Physics, S-factor, Monte Carlo method, Detector, Hadron, Extrapolation, Nuclear physics, Helium burining, Amplitude, Nuclear fusion, Experimental nuclear physic, Nuclear Astrophysic
Abstract

An excitation function of the ground-state gamma (0)-ray capture transition in C-12(alpha, gamma)O-16 at theta (gamma) = 90 degrees was obtained in far geometry using six Ge detectors, where the study of the reaction was initiated in inverse kinematics involving a windowless gas target. The detectors observed predominantly the El capture amplitude. The data at E = 1.32 to 2.99 MeV lead to an extrapolated astrophysical S factor S-E1(E-0) = 90 +/- 15 keV b at E-0 = 0.3 MeV (for the case of constructive interference between the two lowest E1 sources), in good agreement with previous works. However, a novel Monte Carlo approach in the data extrapolation reveals systematic differences between the various data sets such that a combined analysis of all available data sets could produce a biased estimate of the S-E1(E-0) value. As a consequence, the case of destructive interference between the two lowest E1 sources with S-E1(E-0) = 8 +/- 3 keV b cannot be ruled out rigorously.

Published
2001
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10. Fission dynamics with the 4π detector 8πLP

Author

G. Nebbia, A. Brondi, M. A. DiMeo, R. Moro, A. Boiano, M. Cinausero, A. Scherillo, N. Gelli, Emanuele Vardaci, D. Fabris, G. Viesti, A. Ordine, Franco Lucarelli, E. Fioretto, G. Prete, M. Lunardon, G. La Rana, Vardaci, Emanuele, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, A., Ordine, A., Boiano, M. A., Di Meo, A., Scherillo, D., Fabri, M., Lunardon, G., Nebbia, G., Viesti, M., Cinausero, E., Fioretto, G., Prete, N., Gelli, and F., Lucarelli

Subjects
Physics, Nuclear and High Energy Physics, Fissility, Spectrometer, Fission, Prescission Multiplicities, Charged Particle Emission, Atomic and Molecular Physics, and Optics, Charged particle, Nuclear physics, Multinucleon Transfer, Fusion Evaporation, Fusion-Fission, Hermetic detector, Time scale, Statistical model, Fission Dynamic, Atomic physics, Nuclear Experiment
Abstract

A 4pi light charged particle spectrometer, named 8pLP, is in operation at the Laboratori Nazionali di Legnaro (Italy) for the study of the reaction mechanisms produced in low-energy heavy-ion reactions. The spectrometer has recently been used in a study of fission dynamics that involves the detection of light charged particles in the fission and evaporation residue channel in a system of intermediate fissility, as well as in a study of multinucleon transfer to heavy target. Data on the system 240 MeV S-32 + Mo-100 are presented. Dynamical effects extracted as a consequence of the comparison of the data to the statistical model calculations are discussed.

Published
2003
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11. Search for dynamical effects in the fission decay in the 240 MeV 32S + 100Mo reaction

Author

G. Nebbia, M.A. Di Meo, Franco Lucarelli, E. Fioretto, A. Boiano, M. Cinausero, M. Lunardon, G. La Rana, G. Prete, A. Ordine, A. Brondi, G. Viesti, Emanuele Vardaci, A. Scherillo, N. Gelli, D. Fabris, R. Moro, LA RANA, Giovanni, Brondi, Augusto, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, A., Ordine, A., Boiano, M. A., Di Meo, A., Scherillo, D., Fabri, M., Lunardon, G., Nebbia, G., Viesti, M., Cinausero, E., Fioretto, G., Prete, N., Gelli, and F., Lucarelli

Subjects
Physics, Nuclear and High Energy Physics, Cold fission, TIME SCALES, Cluster decay, Fission, PRESCISSION MULTIPLICITIES, CHARGED PARTICLE EMISSION, Nuclear Theory, NUCLEAR VISCOSITY, Alpha particle, Fast fission, Spectral line, Nuclear physics, Nuclear fusion, FUSION-FISSION, Atomic physics, Nuclear Experiment, Excitation
Abstract

Light particles in coincidence with evaporation residues and heavy fragments have been measured by a 4pi charged-particle detector at the INFN Laboratori Nazionali di Legnaro (Padua) for the 240 MeV S-32+Mo-100 reaction leading to the Ce-132 composite system at 152 MeV of excitation energy. Energy spectra of the alpha-particles in coincidence with fission fragments were extracted for many correlation angles both in plane and out of plane. A prominent out-of-plane emission was observed, consistent with the pattern for the near-scission emission. From the fit to the spectra, the pre-scission alpha-particle multiplicity of 0.040 +/- 0.006 was obtained. This value is reproduced by the code PACE2 without the inclusion of a delay time for fission. The presence of fast fission, which could be responsible for this result, is discussed.

Published
2003
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12. A new setup for the underground study of capture reactions

Author

Gianluca Imbriani, Sandra Zavatarelli, Detlef Rogalla, P Cocconi, Joana V. Pinto, Carlo Broggini, B. Limata, F. Parodi, Daniel Bemmerer, A. Formicola, Gyuri Gyürky, Frank Strieder, A. Ordine, Antonio D'Onofrio, H. P. Trautvetter, Zsolt Fülöp, G. Gervino, C. Casella, A Loiano, M Parolin, C. Gustavino, Alberto Vomiero, P. Corvisiero, Lucio Gialanella, M. Junker, R. Bonetti, A. Rottura, Mario R. Romano, P. Musico, A. Lemut, J.P. Ribeiro, H. Costantini, L. Campajola, A. Guglielmetti, E. Somorjai, Vincenzo Roca, Filippo Terrasi, João Cruz, Paolo Prati, C. Rossi-Alvarez, A. P. Jesus, F. Schuemann, C. Rolfs, C., Casella, H., Costantini, A., Lemut, B., Limata, D., Bemmerer, R., Bonetti, C., Broggini, L., Campajola, P., Cocconi, P., Corvisiero, J., Cruz, A., D’Onofrio, A., Formicola, Z., Fülöp, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, G., Gyurky, A., Loiano, Imbriani, Gianluca, A. P., Jesu, M., Junker, P., Musico, A., Ordine, F., Parodi, M., Parolin, J. V., Pinto, P., Prati, J. P., Ribeiro, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, C., Rossi Alvarez, A., Rottura, F., Schuemann, E., Somorjai, F., Strieder, F., Terrasi, H. P., Trautvetter, A., Vomiero, and S., Zavatarelli

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Measure (physics), Underground laboratory, Sensitivity (control systems), Instrumentation, Beam (structure)
Abstract

For the study of astrophysically relevant capture reactions in the underground laboratory LUNA a newsetup of high sensitivity has been implemented. The setup includes a windowless gas target, a 4p BGO summing crystal, and beam calorimeters. The setup has been recently used to measure the d(p,g) 3 He cross-section for the first time within its solar Gamowpeak, i.e. dow n to 2.5 keV c.m. energy. The features of the optimized setup are described. r 2002 Elsevier Science B.V. All rights reserved.

Published
2002
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13. APD readout for Belle II endcap calorimeter upgrade with undoped Cesium Iodide crystals

Author

Alessandro Rossi, Crisostomo Sciacca, Claudia Cecchi, P. Patteri, Elisa Manoni, Alessia Cemmi, I. M. Peruzzi, D. Tagnani, R. de Sangro, Alberto Aloisio, P. Branchini, R. Giordano, G. Finocchiaro, M. Piccolo, P. Lubrano, B. Oberhof, Sergio Cavaliere, A. Passeri, S. Fiore, G. Corradi, E. De Lucia, G. De Nardo, Stefania Baccaro, A. Ordine, G. Felici, M. Montecchi, Fiore, S., Aloisio, Alberto, Baccaro, S., Branchini, P., Cavaliere, S., Cecchi, C., Cemmi, A., Corradi, G., De Lucia, E., DE NARDO, Guglielmo, De Sangro, R., Felici, G., Finocchiaro, G., Giordano, Raffaele, Lubrano, P., Manoni, E., Montecchi, M., Oberhof, B., Ordine, A., Passeri, A., Patteri, P., Peruzzi, I., Piccolo, M., Rossi, A., Sciacca, C., and Tagnani, D.

Subjects
Physics, Nuclear and High Energy Physics, Meson, Calorimeter (particle physics), Radiology, Nuclear Medicine and Imaging, Physics::Instrumentation and Detectors, Physics::Medical Physics, Gamma ray, Physics::Optics, Photodetector, Optical coupling, Nuclear physics, Cesium iodide, Upgrade, Nuclear Medicine and Imaging, Physics::Accelerator Physics, High Energy Physics::Experiment, Irradiation, Radiology
Abstract

The above-mentioned measurements, on crystals, photodetectors and optical couplings, performed at INFN and ENEA laboratories and irradiation facilities, represent a thorough study of options, that will allow the optimal solution for the upgrade of the Belle II end cap calorimeter to be found. © 2014 IEEE.

Published
2014
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14. Absolute cross section of p(7Be,γ)8B using a novel approach

Author

C. Rolfs, A. Ordine, Gianluca Imbriani, Gyuri Gyürky, Filippo Terrasi, Antonio D'Onofrio, Mario R. Romano, E. Somorjai, Lucio Gialanella, Carlo Sabbarese, H. P. Trautvetter, L. Campajola, Detlef Rogalla, Uwe Greife, Vincenzo Roca, Frank Strieder, G. Oliviero, L., Gialanella, F., Strieder, L., Campajola, A., D'Onofrio, U., Greife, G., Gyurky, Imbriani, Gianluca, G., Oliviero, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, D., Rogalla, C., Sabbarese, E., Somorjai, F., Terrasi, H. P., Trautvetter, Gialanella, L., Strieder, F., Campajola, L., D'Onofrio, A., Greife, U., Gyurky, G., Imbriani, G., Oliviero, G., Ordine, A., Roca, V., Rolfs, C., Romano, M., Rogalla, D., Sabbarese, C., Somorjai, E., Terrasi, F., and Trautvetter, H. P.

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Ion beam, Experimental Nuclear physic, Solar neutrinos, Nuclear physics, Momentum, symbols.namesake, Cross section (physics), Yield (chemistry), symbols, Nuclear fusion, Nuclear Astrphysic, Rutherford scattering, Nuclide, Atomic physics
Abstract

The absolute cross section sigma(E) of the radiative capture reaction p(Be-7,gamma)B-8 at the center-of mass energy E = 992 keV has been measured using a radioactive 7Be ion beam and a windowless gas target system filled with H-2 gas. The B-8 residual nuclides were detected with a recoil separator consisting of momentum and velocity filters and a BE E detector telescope. The B-8 yield was observed concurrently with the Be-7+p elastic scattering yield, relating sigma(E) to the Rutherford scattering cross section. The resulting value, sigma(E) = 0.41+/-0.11 mu b, leads to an S(E) factor at zero energy of S(0) = 16+/-4 eV b, in fair agreement with recommended values.

Published
2000
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15. Recoil separator ERNA: ion beam specifications

Author

C. Rolfs, Gianluca Imbriani, L. Gialanella, C. A. Barnes, A. Ordine, Vincenzo Roca, D. Schürmann, E. Fritz, Antonio D'Onofrio, L. Campajola, Mario R. Romano, F. Schümann, Carlo Sabbarese, Uwe Greife, H. P. Trautvetter, Detlef Rogalla, J. Ossmann, Frank Strieder, S. Theis, Marialuisa Aliotta, Filippo Terrasi, D., Rogalla, M., Aliotta, C. A., Barne, L., Campajola, A., D'Onofrio, E., Fritz, L., Gialanella, U., Greife, Imbriani, Gianluca, A., Ordine, J., Ossmann, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, D., Schurmann, F., Schumann, F., Strieder, S., Thei, F., Terrasi, H. P., Trautvetter, D., Schürmann, and F., Schümann

Subjects
Experimental Nuclear Physic, Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Wien filter, Ion beam, Dipole magnet, Magnet, Nuclear Astrophysics, Separator (oil production), Dynamitron, Beam (structure)
Abstract

For improved measurements of the key astrophysical reaction C-12(alpha, gamma)O-16 in inverted kinematics, a recoil separator ERNA is being developed at the 4 MV Dynamitron tandem accelerator in Bochum to detect directly the O-16 recoils with about 50% efficiency. Calculations of the ion beam optics including all filtering and focusing elements of ERNA are presented. Since the C-12 projectiles and the O-16 recoils have essentially the same momentum, and since the C-12 ion beam emerging from the accelerator passes through a momentum filter (analysing magnet), the C-12 ion beam must be as free as possible from O-16 contamination for ERNA to succeed. In the present work, the O-16 contamination was reduced from a level of 1 x 10(-11) to a level below 2 x 10(-29) by the installation of Wien filters both before and after the analysing magnet. The measurement of these and other beam specifications involved other parts of the final ERNA layout - sequentially a Wien filter, a 60 degrees dipole magnet, another Wien filter, and a Delta E-E telescope. The setup led to a measured suppression factor of 5 x 10(-18) for the C-12 ion beam. The experiments also indicate that an almost free choice of the charge state for the O-16 recoils is possible in the separator.

Published
1999
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16. The 8πLP project at LNL. A detection system for light charged particles with deexcitation channel selection

Author

M. Giacchini, Marcello Lunardon, M. Caldogno, A. Brondi, Giuseppe Viesti, Nicla Gelli, Franco Lucarelli, B. K. Nayak, Emanuele Vardaci, A. Boiano, M. Cinausero, G.J Yuan, E. Fioretto, A. Ordine, G. Nebbia, G LaRana, G. Prete, M. Lollo, R. Moro, P. Blasi, A. Zaghi, D. Fabris, G., Prete, E., Fioretto, M., Cinausero, M., Giacchini, M., Lollo, D., Fabri, M., Lunardon, G., Nebbia, G., Viesti, M., Caldogno, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, A., Ordine, A., Zaghi, A., Boiano, P., Blasi, N., Gelli, F., Lucarelli, G. J., Yuan, and B. K., Nayak

Subjects
Charged Particle Detector, Physics, Fission Fragment, Nuclear and High Energy Physics, Range (particle radiation), Solid angle, Particle Identification, Alpha particle, Charged particle, Particle identification, Ion, Nuclear physics, Granularity, Atomic physics, Nuclear Experiment, Charged particle beam, Instrumentation
Abstract

A 4π detection system sensitive to light charged particles is being developed at the Laboratori Nazionali di Legnaro (LNL) for the study of the reaction mechanisms produced in heavy-ion collisions at energies up to 20 AMeV. The 8πLP apparatus is a telescope assembly characterized by large solid angle (90% of 4π) and high granularity (262 modules). Particle identification at low energy is enhanced by combining Δ E – E , TOF and PSD techniques. Thresholds for particle identification range from 1 MeV for protons and 3 MeV for alpha particles to about 2–3 AMeV for C ions. The system is fully operational for experiments.

Published
1999
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17. The Ring Counter (RCo): A high resolution IC–Si–CsI(Tl) device for heavy ion reaction studies at 10–30 MeV/A

Author

A. Lanchais, A. Nannini, Sandro Barlini, Giovanni Casini, A. Moroni, G. Vannini, L. Vannucci, E. Geraci, G.V. Margagliotti, A. Ordine, B. Guiot, S. Piantelli, Massimo Chiari, M. Bruno, V. L. Kravchuk, A. Cortesi, F. Gramegna, G. Giordano, R. Cavaletti, S. Brambilla, L. Bardelli, M. D'Agostino, A. Giussani, J. De Sanctis, A., Moroni, M., Bruno, L., Bardelli, S., Barlini, S., Brambilla, G., Casini, R., Cavaletti, M., Chiari, A., Cortesi, M., Dagostino, J., DE SANCTIS, E., Geraci, G., Giordano, A., Giussani, F., Gramegna, B., Guiot, V., Kravchuk, A., Lanchai, Margagliotti, Giacomo, A., Nannini, A., Ordine, S., Piantelli, G., Vannini, L., Vannucci, A. Moroni, M. Bruno, L. Bardelli, S. Barlini, S. Brambilla, G. Casini, R. Cavaletti, M. Chiari, A. Cortesi, M. D’Agostino, J. De Sancti, E. Geraci, G. Giordano, A. Giussani, F. Gramegna, B. Guiot, V. Kravchuk, A. Lanchai, G.V. Margagliotti, A. Nannini, A. Ordine, S. Piantelli, G. Vannini, and L. Vannucci

Subjects
Charged particle and fragment detection, Fragment isotopic resolution, Heavy-ion reactions, Ionization chambers, Isotope correlation functions, Silicon strip detectors, Nuclear and High Energy Physics, Instrumentation, Physics, Resolution (mass spectrometry), Physics::Instrumentation and Detectors, Detector, Scintillator, CHARGED PARTICLE AND FRAGMENT DETECTION, Charged particle, law.invention, Nuclear physics, Telescope, Ring counter, HEAVY-ION REACTIONS, law, FRAGMENT ISOTOPIC RESOLUTION, IONIZATION CHAMBERS, Ionization chamber, SILICON STRIP DETECTORS, Nuclear Experiment
Abstract

An annular detector (Ring Counter, RCo) is presented, which has been designed and built to detect and identify in mass and charge light charged particles and fragments with very low energy thresholds and high energy resolution. It complements the GARFIELD apparatus, operating at INFN Laboratori Nazionali di Legnaro, to detect the forward emitted products of nuclear heavy ion reactions. It consists of eight sectors of a three-stage telescope, each one formed by an ionization chamber followed by eight strips of a silicon detector and by two CsI(Tl) scintillators. Construction features and performances are described and discussed in details.

Published
2006

18. Measurement of 3He(α, γ)7Be with ERNA Recoil Separator

Author

A. Ordine, Gianluca Imbriani, Mario R. Romano, L. Gialanella, Antonio D'Onofrio, Frank Strieder, Vincenzo Roca, M. De Cesare, Zsolt Fülöp, N. De Cesare, F. Schümann, C. Rolfs, A. Di Leva, Filippo Terrasi, Carmine Lubritto, D. Rogalla, R. Kunz, H.‐P. Trauttvetter, E. Somorjai, Gyuri Gyürky, D. Schürmann, DI LEVA, Antonino, L., Gialanella, D., Schürmann, F., Strieder, D., Rogalla, M., de Cesare, N., De Cesare, A., D'Onofrio, Z., Fülöp, G., Gyürky, Imbriani, Gianluca, R., Kunz, C., Lubritto, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, F., Schümann, E., Somorjai, F., Terrasi, H. P., Trauttvetter, DI LEVA, A, Gialanella, L, Schrmann, D, Strieder, F, Rogalla, D, DE CESARE, M, DE CESARE, N, D'Onofrio, Antonio, Flp, Z, Gyrky, G, Imbriani, G, Kunz, R, Lubritto, Carmine, Ordine, A, Roca, V, Rolfs, C, Romano, M, Schmann, F, Somorjai, E, Terrasi, Filippo, and Trauttvetter, H. P.

Subjects
Physics, solar neutrino, S-factor, Solar neutrino, windowless gas target, Abundance of the chemical elements, Nuclear physics, Big Bang nucleosynthesis, Recoil separator, Nucleosynthesis, Helium-3, Nuclear astrophysics, gamma-ray detection, Radioactive decay, big bang nucleosyntesi
Abstract

The 3He(α, γ)7Be reaction plays an important role in the interpretation of the results of the solar neutrino experiments, since the estimate of the oscillation parameters relies on the solar neutrino spectrum, calculated by solar models. The high energy component in this spectrum is mainly produced by the decay of 7Be and 8B. The uncertainty in the 3He(α, γ) 7Be cross section is also one of the largest contributions to the uncertainty on the predicted primordial 7Li abundance in Big Bang Nucleosynthesis calculations. Previous measurements of the 3He(α, γ)7Be cross section have been performed detecting the capture γ-rays or, alternatively, measuring the activity of the synthesized 7Be. While the results of the two different approaches agree on the energy dependence of the astrophysical S factor, they disagree in the extrapolated S34(0) value at a 3σ level. A novel approach uses the European Recoil separator for Nuclear Astrophysics (ERNA) to detect directly the 7Be ions produced in the reaction and, additionally, the coincident detection of the capture γ-rays. © 2006 American Institute of Physics.

Published
2006

19. Recoil separator ERNA: Gas target and beam suppression

Author

Lucio Gialanella, Gianluca Imbriani, N. De Cesare, Carmine Lubritto, D. Schürmann, Filippo Terrasi, Vincenzo Roca, A. Ordine, Mario R. Romano, F. Schümann, Frank Strieder, A. Di Leva, H. P. Trautvetter, Detlef Rogalla, C. Rolfs, H. Röcken, Antonio D'Onofrio, J. N. Klug, Gialanella, Lucio, Schurmann, D, Strieder, F, Di Leva, A, De Cesare, N, D'Onofrio, Antonio, Imbriani, G, Klug, J, Lubritto, Carmine, Ordine, A, Roca, V, Rocken, H, Rolfs, C, Rogalla, D, Romano, M, Schumann, F, Terrasi, Filippo, Trauttvetter, H. P., L., Gialanella, D., Schürmann, F., Strieder, DI LEVA, Antonino, N., De Cesare, A., D’Onofrio, Imbriani, Gianluca, J., Klug, C., Lubritto, A., Ordine, Roca, Vincenzo, H., Röcken, C., Rolf, D., Rogalla, Romano, Mario, F., Schümann, F., Terrasi, and H. P., Trautvetter

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Projectile, Separator (oil production), Electromagnetic radiation, Recoil separator, Nuclear physics, Nuclear Astrophysics, Experimental nuclear physic, Nuclear Experiment, Dynamitron, Instrumentation, Beam (structure), Oxygen-16
Abstract

For improved cross-section measurements of the reaction 12C(α,γ)16O in inverted kinematics, a recoil separator ERNA is developed at the 4MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. The 16O recoils are produced by the 12C projectiles in a windowless 4He gas target. We report on the pressure profile of the gas target, the beam suppression by the separator, and the first observation of the 16O recoils at selected energies. © 2003 Elsevier B.V. All rights reserved.

Published
2004

20. GARFIELD + RCo digital upgrade: A modern set-up for mass and charge identification of heavy-ion reaction products

Author

P. F. Mastinu, M. Degerlier, Giorgio Baiocco, A. Ordine, F. Gramegna, E. Geraci, M. Cinausero, Tommaso Marchi, S. Carboni, U. Abbondanno, Giacomo Poggi, L. Bardelli, A. Moroni, V. L. Kravchuk, Luca Morelli, M. Bruno, Giovanni Casini, Gabriele Pasquali, M. D Agostino, Silvia Piantelli, Sandro Barlini, Maurizio Bini, M. Bruno, F. Gramegna, T. Marchi, L. Morelli, G. Pasquali, G. Casini, U. Abbondanno, G. Baiocco, L. Bardelli, S. Barlini, M. Bini, S. Carboni, M. Cinausero, M. D’Agostino, M. Degerlier, V. L. Kravchuk, E. Geraci, P. F. Mastinu, A. Ordine, S. Piantelli, G. Poggi, and A. Moroni

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, GAS-CHAMBERS, Physics::Instrumentation and Detectors, SILICON DETECTORS, FOS: Physical sciences, PARTICLE IDENTIFICATION, PULSE-SHAPE DISCRIMINATION, 7. Clean energy, 01 natural sciences, Nuclear physics, STOPPING POWER, 0103 physical sciences, ddc:530, Electronics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Signal processing, RANGE ENERGY MEASUREMENTS, 010308 nuclear & particles physics, 4-PI DETECTOR, Detector, Instrumentation and Detectors (physics.ins-det), Ring counter, Upgrade, SAMPLING SYSTEM, Isospin, Physics::Accelerator Physics, Granularity, HIGH-RESOLUTION
Abstract

An upgraded GARFIELD + Ring Counter (RCo) apparatus is presented with improved performances as far as electronics and detectors are concerned. On one side fast sampling digital read out has been extended to all detectors, allowing for an important simplification of the signal processing chain together with an enriched extracted information. On the other side a relevant improvement has been made in the forward part of the setup (RCo): an increased granularity of the CsI(Tl) crystals and a higher homogeneity in the silicon detector resistivity. The renewed performances of the GARFIELD + RCo array make it suitable for nuclear reaction measurements both with stable and with Radioactive Ion Beams (RIB), like the ones foreseen for the SPES facility, where the Physics of Isospin can be studied., Comment: 13 pages, 19 figures - paper submitted to Eur. Phys. J. A

Published
2013
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21. Direct measurement of the absolute cross section of p(7Be,γ)8B

Author

Vincenzo Roca, Antonio D'Onofrio, Frank Strieder, E. Somorjai, Gianluca Imbriani, C. Rolfs, Filippo Terrasi, Carmine Lubritto, Carlo Sabbarese, H. P. Trautvetter, A. Ordine, Mario R. Romano, L. Gialanella, Detlef Rogalla, L. Campajola, Uwe Greife, Gyuri Gyürky, Terrasi, F., Gialanella, L., Imbriani, G., Strieder, F., Campajola, L., D'Onofrio, A., Greife, U., Gyurky, G., Lubritto, C., Ordine, A., Roca, V., Rolfs, C., Romano, M., Rogalla, D., Sabbarese, C., Somorjai, E., Trautvetter, H. P., F., Terrasi, L., Gialanella, Imbriani, Gianluca, F., Strieder, L., Campajola, A., D'Onofrio, U., Greife, G., Gyurky, C., Lubritto, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, D., Rogalla, C., Sabbarese, E., Somorjai, and H. P., Trautvetter

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Cross section (physics), Solar Hydrogen Burining, Absolute (philosophy), Experimantal nuclear physic, Nuclear Astrophysic
Abstract

A new direct measurement of the absolute cross section of the 1H(7Be,γ)8B reaction has been performed in inverse kinematics at Ecm = 990 keV. A radioactive 7Be beam (Elab, = 8 MeV) and a windowless H2 gas target were used; 8B recoils were identified and counted by a recoil mass separator. The reaction cross section was derived by normalization to the elastic scattering cross section, measured in a separate run. The resulting value σr = 0.40 ± 0.12 μb yielded an astrophysical S-factor at zero energy So = 15.3 ± 4.5 eV b, in fair agreement with recommended values. © 2001 Elsevier Science B.V. All rights reserved.

Published
2001

22. Evaporation and fission decay of (132)Ce compound nuclei at E(x)=122 MeV: some limitations of the statistical model

Author

Franco Lucarelli, P. N. Nadtochy, D. V. Shetty, G. N. Knyazheva, M. Barbui, M. Lunardon, S. Moretto, G. La Rana, N. Gelli, M. Trotta, A. Brondi, G. Viesti, V. Rizzi, D. Fabris, A. Ordine, A. Boiano, M. Cinausero, G. Montagnoli, Emanuele Vardaci, E. Fioretto, G. Prete, A. Di Nitto, E. M. Kozulin, R. Moro, DI NITTO, Antonio, Vardaci, Emanuele, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, P. N., Nadtochy, M., Trotta, A., Ordine, A., Boiano, M., Cinausero, E., Fioretto, G., Prete, V., Rizzi, D. V., Shetty, M., Barbui, D., Fabri, M., Lunardon, G., Montagnoli, S., Moretto, G., Viesti, N., Gelli, F., Lucarelli, G. N., Knyazheva, and E. M., Kozulin

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, nucleo composto, fissione, evaporazione, modello statistico, Fission, Hadron, Astrophysics::Cosmology and Extragalactic Astrophysics, Alpha particle, Charged particle, Spectral line, Nuclear physics, fusion-fission, staistical model, Nuclear fusion, Atomic physics, Nuclear Experiment, fusion-evaporaion
Abstract

Light charged particle (LCP) emission in the evaporation residue (ER) and fusion fission (FF) channels have been studied for the 200 MeV 32S + 100Mo reaction, leading to 132Ce composite nuclei at E x =122 MeV. The main goal was to study the decay of 132 Ce on the basis of an extended set of observables, to get insights on the fission dynamics. The proton and alpha particle energy spectra, their multiplicities, ER-LCP angular correlations, ER and FF angular distributions, and ER and FF cross-sections were measured. The measured observables were compared with the Statistical Model (SM). Using standard parameters, the model was able to reproduce only the pre-scission multiplicities and the FF and ER cross-sections. The calculation was observed to strongly overestimate the proton and alpha particle multiplicities in the ER channel. Disagreements were also observed for the ER-LCP correlations, the LCP energy spectra and the ER angular distribution. By varying the SM input parameters over a wide range of values, it is shown that it is not possible to reproduce all the observables simultaneously with a unique set of parameters. The inadequacy of the model in reproducing the ER particle multiplicities is also observed analysing data from the literature for other systems in the A ≈ 150 and E x ≈ 100−200 MeV region. These results indicate serious limitations about the use of the SM in extracting information on fission dynamics.

Published
2011

23. Stopping power, electron screening and the astrophysical S(E) factor of d(He-3,p)He-4

Author

L. Gialanella, Carlo Broggini, C. Gustavino, Gianluca Imbriani, Vincenzo Roca, Uwe Greife, A. Guglielmetti, Paolo Prati, A. Formicola, A. Fubini, F. Schumann, C. Rolfs, Detlef Rogalla, P. G. Prada Moroni, G. Gervino, A. Ordine, Oscar Straniero, Filippo Terrasi, Antonio D'Onofrio, Sandra Zavatarelli, Frank Strieder, L. Campajola, R. Bonetti, H. Costantini, P. Corvisiero, M. Junker, Mario R. Romano, H. P. Trautvetter, Costantini, H, Formicola, A, Junker, M, Bonetti, R, Broggini, C, Campajola, L, Corvisiero, P, D'Onofrio, Antonio, Fubini, A, Gervino, G, Gialanella, Lucio, Greife, U, Guglielmetti, A, Gustavino, C, Imbriani, G, Ordine, A, Moroni, Pgp, Prati, P, Roca, V, Rogalla, D, Rolfs, C, Romano, M, Schumann, F, Straniero, O, Strieder, F, Terrasi, Filippo, Trautvetter, Hp, Zavatarelli, S., H., Costantini, A., Formicola, M., Junker, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, A., D'Onofrio, A., Fubini, G., Gervino, L., Gialanella, U., Greife, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, A., Ordine, P. G., Prada Moroni, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schümann, O., Straniero, F., Strieder, F., Terrasi, H. P., Trautvetter, and S., Zavatarelli

Subjects
Physics, electron screening, Nuclear and High Energy Physics, Screening effect, Experimental Nuclear physic, Electron, E factor, Potential energy, Ion, Nuclear physics, Cross section (physics), stopping power, Nuclear Astrophysics, Stopping power (particle radiation), Atomic physics, Data reduction
Abstract

The d( 3 He,p) 4 He cross section has been measured at E =4.2 to 13.8 keV using the LUNA underground accelerator facility. The experiment was performed to determine the magnitude of the atomic screening effect and to establish values for the energy loss used in data reduction. The observed stopping power of the 3 He ions in the D 2 target is in good agreement with the standard compilation. Using these stopping power values the data lead to an electron-screening potential energy U e = 132±9 eV, which is significantly higher than the estimated value of 65 eV from an atomic-physics model.

Published
2000

24. Recoil separator ERNA: improved measurements of the astrophysical key reaction 12C(α,γ)16O

Author

Gianluca Imbriani, H. P. Trautvetter, L. Campajola, Lucio Gialanella, Vincenzo Roca, C. Rolfs, Frank Strieder, Uwe Greife, Mario R. Romano, Detlef Rogalla, Marialuisa Aliotta, Filippo Terrasi, A. Ordine, S. Theis, C. A. Barnes, Antonio D'Onofrio, F. Schümann, Carlo Sabbarese, D. Schürmann, D., Rogalla, M., Aliotta, C. A., Barne, L., Campajola, A., D'Onofrio, L., Gialanella, U., Greife, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, D., Schürmann, F., Schümann, F., Strieder, S., Thei, F., Terrasi, and H. P., Trautvetter

Subjects
Experimental Nuclear Physic, Physics, Nuclear physics, Nuclear and High Energy Physics, Range (particle radiation), Nuclear Astrophysics, Nuclear astrophysics, Atomic physics, Tandem accelerator, Nuclear Experiment, Dynamitron, Recoil separator
Abstract

The recoil separator ERNA (European Recoil Separator for Nuclear Astrophysics) for improved measurements of the astrophysical key reaction C-12(alpha, gamma)O-16 is being developed at the 4 MV Dynamitron tandem accelerator in Bochum to detect directly the O-16 recoils. The total detection efficiency of about 50 % allows direct measurements in a much wider energy range than previously accessible. In addition this technique allows improved measurements not hampered by cosmic background problems when compared to gamma -ray detection.

Published
2001
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25. Nuclear dissipation effects on fission and evaporation for systems of intermediate fissility

Author

G. La Rana, P.N. Nadotchy, A. Di Nitto, Franco Lucarelli, A. Brondi, A. Ordine, N. Gelli, R. Moro, G. Prete, Emanuele Vardaci, A. Boiano, M. Cinausero, V. Rizzi, L. Bonneau, N. Dubray, F. Gunsing and B. Jurado, P. N., Nadotchy, Brondi, Augusto, DI NITTO, Antonio, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, A., Ordine, A., Boiano, M., Cinausero, G., Prete, V., Rizzi, N., Gelli, and F., Lucarelli

Subjects
Nuclear physics, Physics, Fissility, Fission, QC1-999, Evaporation, Particle, Dissipation, Nuclear Experiment, Nuclear matter, Charged particle, Spectral line
Abstract

The systems of intermediate fissility 132Ce and 158Er have been studied experimentally and theoretically in order to investigate the dissipation properties of nuclear matter. Cross sections of fusion-fission and evaporation residues channels together with charged particles multiplicities in both channels, their spectra, angular correlations and mass-energy distribution of fission fragments have been measured. Theoretical analysis has been performed using multi-dimensional stochastic approach with realistic treatment of particle evaporation. The results of analysis show that full one-body or unusually strong two-body dissipation allows to reproduce experimental data. No temperature dependent dissipation was needed.

Published
2010

26. Recoil separator ERNA: Ion Beam purification'

Author

C. Rolfs, H. P. Trautvetter, A. Ordine, Gianluca Imbriani, Mario R. Romano, Uwe Greife, L. Campajola, S. Theis, Frank Strieder, Vincenzo Roca, Detlef Rogalla, F. Schümann, Carlo Sabbarese, Filippo Terrasi, Antonio D'Onofrio, L. Gialanella, D., Rogalla, S., Thei, L., Campajola, A., D'Onofrio, L., Gialanella, U., Greife, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, F., Schumann, F., Strieder, F., Terrasi, H. P., Trautvetter, F., Schümann, Rogalla, D, Theis, S, Campajola, L, D'Onofrio, Antonio, Gialanella, Lucio, Greife, U, Imbriani, G, Ordine, A, Roca, V, Rolfs, C, Romano, M, Sabbarese, Carlo, Schumann, F, Strieder, F, Terrasi, Filippo, and Trautvetter, Hp

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Ion beam, Particle detector, Semiconductor detector, Momentum, Nuclear physics, Nuclear Astrophysics, Measuring instrument, Nuclear astrophysics, Physics::Accelerator Physics, Atomic physics, Experimental nuclear physic, Instrumentation, Beam (structure)
Abstract

For improved measurements of the key astrophysical reaction View the MathML source in inverse kinematics, a recoil separator ERNA is developed to detect directly the View the MathML source recoils with nearly 100% efficiency. Since the View the MathML source projectiles and the View the MathML source recoils have essentially the same momentum and since the View the MathML source ion beam emerging from an accelerator usually passes through a momentum filter, a sufficient absence of an View the MathML source beam contaminant in the View the MathML source ion beam is of utmost importance for ERNA. In the present work, a Wien filter together with a ΔE−E telescope are used to investigate the beam contaminants accompanying a momentum-filtered View the MathML source ion beam and to measure the level of ion beam purification achievable with the Wien filter.

Published
1999

27. Statistics vs. dynamics in fission: light and shade from systems of intermediate fissility

Author

E. Vardaci, A. Di Nitto, P. N. Nadtochy, A. Brondi, G. La Rana, R. Moro, M. Trotta, A. Ordine, A. Boiano, M. Cinausero, G. Prete, V. Rizzi, G. Montagnoli, N. Gelli, F. Lucarelli, G. N. Knyazheva, E. M. Kozulin, V. A. Rubchenya, Audrey Chatillon, Herbert Faust, Gabriele Fioni, Dominique Goutte, Héloise Goutte, Vardaci, Emanuele, Di Nitto, A., Nadtochy, P. N., Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Trotta, M., Ordine, A., Boiano, A., Cinausero, M., Prete, G., Rizzi, V., Montagnoli, G., Gelli, N., Lucarelli, F., Knyazheva, G. N., Kozulin, E. M., and Rubchenya, V. A.

Subjects
Physics, Fissility, TIME SCALES, Proton, Scale (ratio), Fission, Statistical model, Alpha particle, Charged particle, Nuclear physics, PRESCISSION EVAPORATION, Nuclear fusion, INTERMEDIATE MASS SYSTEMS, FUSION-FISSION, Statistical physics, FISSION DYNAMICS, Nuclear Experiment
Abstract

Systems of intermediate fissility are characterized by an evaporation residues cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the pre‐scission channel. In a theoretical framework in which time scale estimates of the fission process rely on statistical model calculations, the analysis of particle emission in the evaporation residues channel is the source of additional constraints on the statistical and dynamical models. This contribution will focus on our statistical and dynamical analysis of a more complete set of data from the system 32S+100Mo at ELab = 200 MeV. Statistical model fails in reproducing the whole set of data and no convincing estimate is possible of the fission time scale. In particular, while pre‐scission multiplicities can be reproduced without delay, the model strongly overestimates proton and alpha particle multiplicities in the evaporation residues channel irrespective of the statistical model input parameters and prescriptions used for the level density and the transmission coefficients. The analysis of the same set of data with a three‐dimensional Langevin dynamical model produces a very good agreement with the full set of data and indicates that one‐body dissipation plays a dominant role in the fission process, implying a fission delay 23–25×10−21 s.

Published
2009
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28. Measurement of dynamical dipoleγ-ray emission in theN/Z-asymmetric fusion reactionO16+Sn116at 12 MeV/nucleon

Author

A. Ordine, S. Brambilla, M. Ciemala, F. Camera, Giovanni Casini, A. Bracco, M. Cinausero, D. Montanari, V. L. Kravchuk, G. Benzoni, M. Degerlier, F. Gramegna, S. Myalski, Sandro Barlini, Silvia Piantelli, M. Di Toro, V. Rizzi, Maurizio Bini, Gabriele Pasquali, N. Blasi, Domenico Santonocito, F. C. L. Crespi, Giorgio Baiocco, S. Leoni, R. Nicolini, Maria Colonna, Luca Morelli, T. Marchi, A. Maj, M. D'Agostino, S. Sambi, L. Bardelli, R. Alba, M. Kmiecik, O. Wieland, A. Giaz, V. Vandone, C. Rizzo, Andrea Corsi, K. Mazurek, M. Bruno, Giacomo Poggi, C. Maiolino, and B. Million

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Muon-catalyzed fusion, Dipole, Gamma ray, Nuclear fusion, Nuclear drip line, Atomic physics, Nucleon
Published
2014
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29. Recoil Separator ERNA: measurement of 3He(α,γ)7Be

Author

Vincenzo Roca, D. Schürmann, R. Kunz, A. Ordine, C. Rolfs, Gianluca Imbriani, M. De Cesare, Antonio D'Onofrio, Frank Strieder, N. De Cesare, A. Di Leva, Detlef Rogalla, Lucio Gialanella, E. Somorjai, Mario R. Romano, Filippo Terrasi, A., DI LEVA, M., DE CESARE, D., Schuermann, N., DE CESARE, D'Onofrio, Antonio, Gialanella, Lucio, R., Kunz, G., Imbriani, A., Ordine, V. ROCA D., Rogalla, C., Rolf, M., Romano, E., Somorjai, F., Strieder, Terrasi, Filippo, DI LEVA, Antonino, M., De Cesare, D., Schürmann, N., De Cesare, A., D’Onofrio, L., Gialanella, Imbriani, Gianluca, Roca, Vincenzo, D., Rogalla, Romano, Mario, and F., Terrasi

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Electron capture, Solar neutrino, Detector, Spectral line, Nuclear physics, Recoil, Big Bang nucleosynthesis, Nuclear Astrophysics, Nuclear astrophysics, Thermal emittance, Instrumentation, Experomental Nuclear physic
Abstract

The reaction He 3 ( α , γ ) Be 7 plays a key role for the understanding of the production of 7Li in Big Bang nucleosynthesis as well as for the high energy component of the solar neutrino spectrum. The uncertainty in its absolute cross-section arises from systematic differences of the available data sets. In various experiments the cross-section was measured by the detection of the prompt γ -rays or by the off-line observation of the γ -rays following the 7Be electron capture; in a few cases both observations were carried out. We report on a new approach based on the use of the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the 7Be recoils as well as the prompt γ -rays in coincidence with the recoils. We present technical details of the experimental setup, such as a recirculating 3He gas target, a TOF-E end detector, and a NaI detector array. In addition, the measurement of the separator acceptance is discussed and compared to the expected recoil emittance. The feasibility of the approach is demonstrated by sample spectra, indicating cross-section determinations of He 3 ( α , γ ) Be 7 in the energy range E cm = 0.7 – 3.3 MeV with high precision and accuracy.

Published
2008

30. Isotope analysis in central heavy ion collisions at intermediate energies

Author

Collaboration, NUCL-EX, Geraci, E., Abbondanno, U., Bardelli, L., Barlini, S., Bini, M., Bruno, M., Cannata, F., Casini, G., Chiari, M., D'Agostino, M., DeSanctis, J., Giussani, A., Gramegna, F., Kravchuk, V. L., Lanchais, A. L., Marini, P., Moroni, A., Nannini, A., Olmi, A., Ordine, A., Pasquali, G., Piantelli, S., Poggi, G., Vannini, G., E. Geraci, U. Abbondanno, L. Bardelli, S. Barlini, M. Bini, M. Bruno, F. Cannata, G. Casini, M. Chiari, M. D’Agostino, J. De Sancti, A. Giussani, F. Gramegna, V. L. Kravchuk, A. L. Lanchai, P. Marini, A. Moroni, A. Nannini, A. Olmi, A. Ordine, G. Pasquali, S. Piantelli, G. Poggi, and G. Vannini

Subjects
Physics, Equation of state, ASYMMETRIC NUCLEAR MATTER, EQUATION OF STATE, Physics::Medical Physics, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, General Physics and Astronomy, SYMMETRY ENERGY, HEAVY-ION COLLISIONS, Nuclear matter, Symmetry (physics), Nuclear physics, ISOTOPES, General Materials Science, Heavy ion, Nuclear Experiment (nucl-ex), Physical and Theoretical Chemistry, Atomic physics, Nuclear Experiment
Abstract

Symmetry energy is a key quantity in the study of the equation of state of asymmetric nuclear matter. Heavy ion collisions at low and intermediate energies, performed at Laboratori Nazionali di Legnaro and Laboratori Nazionali del Sud, can be used to extract information on the symmetry energy coefficient Csym, which is currently poorly known but relevant both for astrophysics and for structure of exotic nuclei., 2 pages, 1 figure. Proceedings of 7th International Conference on Radioactive Nuclear Beams (RNB7), to be published in The European Physical Journal A

Published
2007

31. Nuclear Viscosity in the Fission of 132Ce Composite Nuclei at Ex=122 MeV

Author

A. Boiano, A. Brondi, M. Cinausero, D. Guadagnuolo, R. Moro, A. Di Nitto, Emanuele Vardaci, Nicla Gelli, Franco Lucarelli, P. N. Nadtochy, A. Ordine, V. Fiorillo, G. La Rana, V. A. Rubchenya, V. Rizzi, E. Fioretto, G. Prete, M. Trotta, LA RANA, Giovanni, Brondi, Augusto, Di Nitto, A., Fiorillo, V., Guadagnuolo, D., Moro, RENATA EMILIA MARIA, Trotta, M., Vardaci, Emanuele, Ordine, A., Boiano, A., Cinausero, M., Fioretto, E., Prete, G., Rizzi, V., Lucarelli, F., Gelli, N., Nadtochy, P. N., and Rubchenya, V. A.

Subjects
Physics, Fissility, intermediate fissility system, Fission, time scales, Composite number, Multiplicity (mathematics), Observable, Dissipation, fission dynamic, Charged particle, Langevin equation, Nuclear physics, fusion fission, Atomic physics, Nuclear Experiment, prescission multiplitity
Abstract

Fission dynamics in systems of intermediate fissility is under study with the 8πLP apparatus at the Laboratori Nazionali di Legnaro (Italy). Here we present some preliminary results for the composite system 132Ce at Ex=122 MeV, produced in the reaction 32S + 100Mo at Elab=200 MeV. Measured charged particle multiplicities in the evaporation residue and fission channels, and cross sections of the two channels have been compared to the predictions of a dynamical model based on three dimensional Langevin equations. The sizeable set of measured observables allowed to put severe constraints to the model. A good overall agreement is obtained assuming one body dissipation, which implies a fission delay in the range 15 – 25 ×10−21 s.

Published
2006
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32. γ-ray detection possibilities in the European Recoil Separator for Nuclear Astrophysics

Author

C. Rolfs, Gianluca Imbriani, F. Schümann, Detlef Rogalla, Filippo Terrasi, A. Di Leva, A. Ordine, R. Kunz, N. De Cesare, D. Schürmann, F. Strieder, Antonio D'Onofrio, Vincenzo Roca, Mario R. Romano, H. P. Trautvetter, Lucio Gialanella, D., Schürmann, DI LEVA, Antonino, L., Gialanella, D., Rogalla, F., Strieder, N., De Cesare, A., D'Onofrio, Imbriani, Gianluca, R., Kunz, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, F., Schümann, F., Terrasi, and H. P., Trautvetter

Subjects
Nuclear physics, Physics, Light nucleus, Germanium radiation detectors, chemistry, Nuclear astrophysics, chemistry.chemical_element, Alpha particle, Gamma detection, Carbon, Recoil separator, Gamma ray detection
Published
2006

33. THERMODYNAMICAL ASPECTS IN HEAVY ION REACTIONS

Author

F. Cannata, Francesca Gulminelli, S. Fabbri, Giovanni Casini, G. Vannini, A. Lanchais, U. Abbondanno, E. Fuschini, Massimo Chiari, V. L. Kravchuk, F. Gramegna, Giacomo Vito Margagliotti, E. Verondini, Sandro Barlini, M. Bruno, L. Vannucci, Ph. Chomaz, B. Guiot, A. Nannini, E. Geraci, A. Ordine, M. D'Agostino, A. Moroni, J. De Sanctis, G. LARANA, C. SIGNORINI, S SHIMOURA, M. BRUNO, F. CANNATA, M. D'AGOSTINO, J. DE SANCTIS, S. FABBRI, E. FUSCHINI, E. GERACI, B. GUIOT, G. VANNINI, E. VERONDINI, F. GULMINELLI, PH. CHOMAZ, G. CASINI, M. CHIARI, A. NANNINI, S. BARLINI, F. GRAMEGNA, V. KRAVCHUK, A. LANCHAIS, L. VANNUCCI, A. MORONI, A. ORDINE, U. ABBONDANNO, and G. V. MARGAGLIOTTI

Subjects
TERMODINAMICA DI SISTEMI CARICHI E FINITI, PROSPETTIVE FUTURE PER ESPERIMENTI DI TERMODINAMICA NUCLEARE, Nuclear physics, SEGNALI DI TRANSIZIONE DI FASE, Chemistry, Liquid gas, EQUILIBRIO DI SISTEMI ECCITATI, Finite system, CALORE SPECIFICO NEGATIVO, Heavy ion, Nuclear Experiment
Abstract

The excited nuclear systems formed in heavy ion collisions can be studied from a thermodynamical point of view. Charged finite systems have different behaviors with respect to infinite ones. After experimental selection of such equilibrated systems the extraction of thermodynamic coordinates is performed. Different signals compatible with a liquid-gas phase transition have been obtained. In particular a bimodal distribution of the asymmetry between the first two heaviest fragments is presented. Abnormally large fluctuations, which in thermodynamic equilibrium are associated to a negative branch of the heat capacity give indications of a first order phase transition. Perspectives for new generation experiments are indicated.

Published
2005
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34. SEARCH FOR ISOSPIN EFFECTS ON THE LEVEL DENSITY OF NUCLEI INVOLVED IN THE DECAY OF 139Eu

Author

A. Ordine, I. M. Govil, R. Moro, V. Rizzi, M. Barbui, M. Trotta, E. Fioretto, M. Lunardon, G. Prete, G. La Rana, D. Fabris, Nicla Gelli, A. Boiano, M. Cinausero, Franco Lucarelli, A. Brondi, R. Mordente, Emanuele Vardaci, G. La Rana, C. Signorini, S. Shimoura, N., Gelli, F., Lucarelli, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, M., Trotta, Vardaci, Emanuele, A., Ordine, A., Boiano, R., Mordente, M., Cinausero, E., Fioretto, G., Prete, M., Barbui, D., Fabri, V., Rizzi, and I., Govil

Subjects
Nuclear physics, Physics, Particle physics, HOT NUCLEI, Isospin, CHARGED PARTICLE EMISSION, ISOSPIN EFFECTS, LEVEL DENSITY
Abstract

Evaporative proton and alpha particle energy spectra and angular distributions have been measured in the decay of the compound nucleus 139Eu produced at an excitation energy of 90 MeV by the 32S + 107Ag reaction. In-plane and out-of-plane angular distributions and energy spectra of alpha particles have been compared with theoretical calculations performed using the statistical Montecarlo code Lilita. Three expressions for the level density parameter have been used: a) without isospin dependence b) with N-Z isospin dependence and c) with Z-Z0 isospin dependence, based on the distance of the nucleus from the valley of stability. The predictions by the Z-Z0 prescription fail to reproduce the data. Isospin independent and N-Z dependence reasonably well reproduce the data.

Published
2005
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35. FISSION DYNAMICS IN SYSTEMS OF INTERMEDIATE FISSILITY WITH 8LP APPARATUS

Author

S. Moretto, R. Moro, Emanuele Vardaci, V. Rizzi, D. Fabris, A. Ordine, A. Boiano, M. Cinausero, Nicla Gelli, M. Lunardon, G. La Rana, E. Fioretto, A. Brondi, G. Prete, D. V. Shetty, G. Viesti, R. Mordente, Franco Lucarelli, P. N. Nadtochy, V. A. Rubchenya, M. Barbui, M. Trotta, G. La Rana, C. Signorini, S. Shimoura, Vardaci, Emanuele, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, M., Trotta, A., Ordine, A., Boiano, R., Mordente, M., Cinausero, E., Fioretto, G., Prete, V., Rizzi, D., Shetty, M., Barbui, D., Fabri, M., Lunardon, S., Moretto, G., Viesti, N., Gelli, F., Lucarelli, V. A., Rubchenya, and P. N., Nadtochy

Subjects
Nuclear physics, Physics, Fissility, Fission, prescission multiplicity, Dynamics (mechanics), statistical model, ime scale, fission dynamic
Abstract

We have started a research program at LNL with the apparatus 8πLP aimed at studying the fission dynamics in systems of intermediate fissility using light charged particles as probes. These systems are characterized by an evaporation residues (ER) cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the pre-scission channel. In a theoretical framework in which time scale estimates rely on statistical model calculations, the additional analysis of particle emission in the ER channel allows to put more constraints on the input parameters of statistical and dynamical models. The presentation will report about an overall view of the systems studied so far and will provide clues for interesting physical cases. Recent advancement will also be discussed on the interplay between the fission and the evaporation residues channels as implied by a dynamical approach to the description of the fission process.

Published
2005

36. First direct measurement of the total cross-section of 12C(α,γ)16O

Author

D. Schürmann, A. Di Leva, L. Gialanella, D. Rogalla, F. Strieder, N. De Cesare, A. D'Onofrio, G. Imbriani, R. Kunz, C. Lubritto, A. Ordine, V. Roca, C. Rolfs, M. Romano, F. Schümann, F. Terrasi, H. -P. Trautvetter, D., Schürmann, DI LEVA, Antonino, L., Gialanella, D., Rogalla, F., Strieder, N., De Cesare, A., D'Onofrio, Imbriani, Gianluca, R., Kunz, C., Lubritto, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, F., Schümann, F., Terrasi, and H. P., Trautvetter

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Inverse kinematics, Separator (oil production), Alpha (navigation), Stellar helium burnung, Nuclear physics, Cross section (physics), Recoil, Nuclear Experiment, Experimental nuclear physic, Experimental Nuclear Astrophysic, Energy (signal processing)
Abstract

The total cross section of 12C(alpha,gamma)16O was measured for the first time by a direct and ungated detection of the 16O recoils. This measurement in inverse kinematics using the recoil mass separator ERNA in combination with a windowless He gas target allowed to collect data with high precision in the energy range E=1.9 to 4.9 MeV. The data represent new information for the determination of the astrophysical S(E) factor.

Published
2005

37. Recoil separator ERNA: charge state distribution, target density, beam heating, and longitudinal acceptance

Author

Vincenzo Roca, Lucio Gialanella, Gianluca Imbriani, D. Schürmann, Antonio D'Onofrio, Carmine Lubritto, J. N. Klug, A. Di Leva, H. Röcken, N. De Cesare, A. Ordine, Filippo Terrasi, H. P. Trautvetter, C. Rolfs, F. Schümann, Detlef Rogalla, Frank Strieder, Mario R. Romano, Schürmann, D., Strieder, F., DI LEVA, A., Gialanella, L., DE CESARE, N., D'Onofrio, Antonio, Imbriani, G., Klug, J., Lubritto, Carmine, Ordine, A., Roca, V., Röcken, H., Rolfs, C., Rogalla, D., Romano, M., Schümann, F., Terrasi, Filippo, Trautvetter, H. P., Schuermann, D., DI LEVA, Antonino, De Cesare, N., D'Onofrio, A., Imbriani, Gianluca, Lubritto, C., Roca, Vincenzo, Rocken, H., Romano, Mario, Schuemann, F., and Terrasi, F.

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Projectile, Separator (oil production), Charge (physics), Recoil separator, Nuclear physics, Cross section (physics), Nuclear Astrophysics, Nuclear Experiment, State distribution, Dynamitron, Experimental nuclear physic, Instrumentation, Beam (structure)
Abstract

For improved cross section measurements of the reaction 12 C ( α , γ ) 16 O in inverted kinematics, a recoil separator ERNA is developed at the 4 MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. The 16O recoils are produced by the 12C projectiles in a windowless 4He gas target. We report on the charge state distribution of the 16O recoils, the gas target density, the beam heating of the gas target, and the acceptance of the separator along the extended gas target.

Published
2004

38. Li-6 breakup from Pb-208 target at Coulomb barrier energies: doorway to reaction mechanism induced by loosely bound/halo nuclei

Author

R. Moro, G. Viesti, Lorenzo Fortunato, D. Fabris, E. Fioretto, Emanuele Vardaci, M. Barbui, P. Scopel, A. Brondi, F. Soramel, M. Lunardon, G. La Rana, Andrea Vitturi, M. Cinausero, M. Mazzocco, G.F. Prete, V. Rizzi, L. Stroe, C. Signorini, Ian J. Thompson, M. Trotta, A. Ordine, M., Mazzocco, P., Scopel, C., Signorini, L., Fortunato, F., Soramel, I. J., Thompson, A., Vitturi, M., Barbui, Brondi, Augusto, M., Cinausero, D., Fabri, E., Fioretto, LA RANA, Giovanni, M., Lunardon, Moro, RENATA EMILIA MARIA, A., Ordine, G. F., Prete, V., Rizzi, L., Stroe, M., Trotta, Vardaci, Emanuele, and G., Viesti

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Light nucleus, Reaction mechanism, REACTION CHANNELS, BREAKU CROSS SECTION, Binding energy, Coulomb barrier, Halo, LOOSELY BOUND NUCLEI, Atomic physics, Breakup
Abstract

systemhave beendeduced. Comparisonoftheexperimentaldatawithtwodifferenttheoretical approaches strongly supports the direct breakup process description.1. INTRODUCTIONThe growing interest and effort of the nuclear physicists community for experimentsperformed with Radioactive Nuclear Beams (RIBs), has triggered several experimentsthat can be performed using stable beams and could give a first taste of what kind ofdifficulties and results we will face once RIBs will be available. In this perspective, it’snatural to choose stable beams that have characteristics very close to those of the RIBs.For example, if one considers the binding energy of the nuclei, it’s immediately clear thatsome stable light nuclei are weakly bound, like many light RIBs

Published
2004

39. The 8/spl pi/LP project: a 4/spl pi/ light charged particle detection array at LNL

Author

Franco Lucarelli, Emanuele Vardaci, M. Lollo, A. Brondi, Nicla Gelli, A. Ordine, M. Giacchini, R. Burch, G. La Rana, M. Cinausero, E. Fioretto, D. Fabris, Giuseppe Viesti, G. Nebbia, G. Prete, A. Boiano, Marcello Lunardon, M. Caldogno, R. Moro, and A. Zaghi

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Physics::Instrumentation and Detectors, Alpha particle, Particle identification, Charged particle, law.invention, Photodiode, Ion, Nuclear physics, Telescope, Nuclear Energy and Engineering, law, Nuclear electronics, Electrical and Electronic Engineering, Nuclear Experiment
Abstract

A 4/spl pi/ detection system sensitive to light charged particles is being developed at the Laboratori Nazionali di Legnaro (LNL) for the study of the reaction mechanisms produced in heavy ion collisions at energies up to 20 AMeV. The 8/spl pi/LP apparatus is a telescope assembly characterized by large solid angle (90% of 4/spl pi/) and high granularity (262 modules). Particle identification at low energy is obtained by combining /spl Delta/E-E, TOF and PSD techniques. Each telescope is made of a 300 /spl mu/m passivated silicon detector and a 15 mm (or 5 mm) CsI(Tl) crystal with photodiode readout. Thresholds for particle identification range from 1 MeV for protons and 3 MeV for alpha particles to about 2-3 AMeV for C ions. A low-cost trigger and readout bus system has been developed to cope with the large number of parameters and the high counting rate. The system will be fully operational for experiments in the summer of 1997.

Published
1997
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40. Nuclear Reactions below 20AMeV studied with the LNL 8pLP specrometer

Author

M. Lunardon, G. La Rana, R. K. Choudhury, A. Ordine, R. Moro, S. S. Kapoor, Nicla Gelli, Dwaipayan Biswas, G. Viesti, A. Brondi, Emanuele Vardaci, G. Nebbia, V. Rizzi, Franco Lucarelli, D. Fabris, A. Saxena, D.V. Shetty, M. Barbui, E. Fioretto, A. Boiano, G. Prete, M. Cinausero, B. K. Nayak, S. Pesente, A. M. Samant, S. Moretto, K. Yoshida, S. Kubono, I. Tanihata, C. Signorini, E., Fioretto, M., Cinausero, G., Prete, D., Shetty, M., Barbui, D., Fabri, M., Lunardon, S., Moretto, G., Nebbia, S., Pesente, V., Rizzi, A., Samant, G., Viesti, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, A., Boiano, A., Ordine, N., Gelli, F., Lucarelli, A., Saxena, B. K., Nayak, D. C., Biswa, R. K., Choudhury, and S. S., Kapoor

Subjects
Nuclear reaction, Physics, Light nucleus, Spectrometer, light charged paricle detection, fission fragments, Nuclear Reaction, Particle detector, Nuclear physics, Helium-3, Proton spectra, evaporation residue, Isotopes of helium, 8pLP spectrometer
Abstract

A 4π detection system sensitive to light charged particles is fully operational at the Laboratori Nazionali di Legnaro (LNL) since the end of 1998. The apparatus, called 8πLP, is dedicated to the study of the reaction mechanisms in heavy ion collisions at energies up to 20 AMeV. The system is a telescope array based on ΔE-E, Time of Flight and Pulse Shape Discrimination identification techniques, operating in coincidence with specialized trigger detectors for evaporation residues and fission fragments.

Published
2003

41. STUDY OF TRANSFER INDUCED FISSION AND FUSION-FISSION REACTIONS FOR 28<font>SI</font> + 232<font>TH</font> SYSTEM AT 340 MEV

Author

G. Nebbia, A. M. Samant, B. K. Nayak, Nicla Gelli, A. Brondi, Dwaipayan Biswas, E. Fioretto, Franco Lucarelli, R. Moro, S. S. Kapoor, M. Lunardon, D. Fabris, G. Prete, S. Pesente, G. La Rana, A. Boiano, M. Cinausero, A. Saxena, D.V. Shetty, Emanuele Vardaci, R. K. Choudhury, V. Rizzi, A. Ordine, G. Viesti, G. Fazio, G. Giardina, F. Hanappe, G. Immè, Neil Rowley, D., Fabri, M., Lunardon, G., Nebbia, A., Samant, G., Viesti, V., Rizzi, E., Fioretto, G., Prete, M., Cinausero, D. V., Shetty, S., Pesente, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, A., Boiano, A., Ordine, N., Gelli, F., Lucarelli, A., Saxena, B. K., Nayak, D. C., Biswa, R. K., Choudhury, and S. S., Kapoor

Subjects
Nuclear physics, fusion-fission, Materials science, Fission, transfer induced fission, Fusion fission, nuclear viscosity, survival probability, fission dynamic
Abstract

Transfer induced fission probabilities Pf have been measured in the collisions of 340 MeV 28Si on 232Th target as a function of the detected projectile-like fragment (PLF) charge. The measured Pf shows an increase with the net charge transfer ΔZ, in the range ΔZ =0-4. For larger ΔZ values (ΔZ =5-10), the fission probability exhibits first a saturation in the range of values Pf =0.4-0.6 and than a drop. Coincidences between PLF and light charge particles reveal that the charged particle emission is strongly damped when the fission fragments is required. An important component in the charged particle emission is localized in the direction of the recoiling target-like fragment (TLF); which is, in some cases, directly detected. Therefore results indicate a significant survival against fission of the populated TLF fragments.

Published
2002
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42. Stopping power of low-energy deuterons in He-3 gas

Author

Vincenzo Roca, M. Junker, Paolo Prati, Mario R. Romano, Gianluca Imbriani, Detlef Rogalla, Antonio D'Onofrio, H. Costantini, R.W. Kavanagh, C. Gustavino, A. Ordine, Gyuri Gyürky, Zsolt Fülöp, E. Somorjai, R. Bonetti, G. Gervino, Oscar Straniero, P. Corvisiero, Marialuisa Aliotta, A. Formicola, Filippo Terrasi, L. Campajola, A. Guglielmetti, H. P. Trautvetter, Frank Strieder, Lucio Gialanella, Carlo Broggini, F. Raiola, C. Rolfs, Sandra Zavatarelli, F. Schümann, P. G. Prada Moroni, Raiola, F, Gyurky, G, Aliotta, M, Formicola, A, Bonetti, R, Broggini, C, Campajola, L, Corvisiero, P, Costantini, H, D'Onofrio, A, Fulop, Z, Gervino, G, Gialanella, L, Guglielmetti, A, Gustavino, C, Imbriani, Gianluca, Junker, M, Kavanagh, Rw, Moroni, Pgp, Ordine, A, Prati, P, Roca, Vincenzo, Rogalla, D, Rolfs, C, Romano, Mario, Schumann, F, Somorjai, E, Straniero, O, Strieder, F., Terrasi, F, Trautvetter, Hp, and Zavatarelli, S.

Subjects
Physics, Experimental Nuclear Physic, Nuclear and High Energy Physics, Hadron, chemistry.chemical_element, Energy loss and stopping power, DISSOCIATION, HYDROGEN, Charged particle, Ion, H2+ IONS, Nuclear physics, chemistry, Deuterium, Helium-3, VELOCITY PROPORTIONALITY, Nuclear fusion, Atomic physics, HELIUM, Isotopes of helium, Helium
Abstract

The stopping power of atomic and molecular deuterons in 3 He gas was measured over the range Ed = 10 to 100 keV using the 3 He pressure dependence of the 3 He(d,p) 4 He reactionyield. At en ergies above 30 keV, the observed stopping power values are in good agreement with a standard compilation. However, near 18 keV the experimental values drop by a factor 50 below the extrapolated values of the compilation. In a simple model, the behavior is due to the minimum 1s → 2s electronexcitationof the He target atoms (= 19.8 eV, corresponding to Ed = 18.2 keV), i.e. it is a quantum effect, by which the atoms become nearly transparent for the ions.

Published
2001

43. Nuclear detecting systems at LNL and LNS: foreseen experiments to provide basic data for heavy-ion risk assessment

Author

Moroni, A., Abbondanno, U., Agodi, C., Alba, R., Ballarini, F., Bellia, G., Biaggi, M., Bruno, M., Casini, G., Cavallaro, S., Cherubini, R., Massimo Chiari, Colonna, N., Coniglione, R., D Agostino, M., Del Zoppo, A., Giussani, A., Gramegna, F., Maiolino, C., Margagliotti, G. V., Mastinu, P. F., Migneco, E., Milazzo, P. M., Nannini, A., Ordine, A., Ottolenghi, A., Piattelli, P., Santonocito, D., Sapienza, P., Vannini, G., Vannucci, L., Vardaci, E., A., Moroni, U., Abbondanno, C., Agodi, R., Alba, E., Ballarini, G., Bellia, M., Biaggi, M., Bruno, G., Casini, S., Cavallaro, R., Cherubini, M., Chiari, N., Colonna, R., Coniglione, M., D'Agostino, A. D., Zoppo, A., Giussani, F., Gramegna, C., Maiolino, G. V., Margagliotti, P. F., Mastinu, E., Migneco, P. M., Milazzo, A., Nannini, A., Ordine, A., Ottolenghi, P., Piattelli, D., Santonocito, P., Sapienza, G., Vannini, L., Vannucci, Vardaci, Emanuele, F., Ballarini, M., Dagostino, A., DEL ZOPPO, Margagliotti, Giacomo, and E., Vardaci

Subjects
Radiotherapy, radiation risk, Equipment Design, Space Flight, Risk Assessment, nuclear reaction, Carbon, heavy ion, Oxygen, Italy, Gamma Rays, Radiation Monitoring, fragmentation, Heavy Ions, Nuclear Physics
Abstract

The use of existing detecting systems developed for nuclear physics studies allows collecting data on particle and ion production cross-sections in reactions induced by Oxygen and Carbon beams, of interest for hadrontherapy and heavy-ion risk assessment. The MULTICS and GARFIELD apparatus, together with the foreseen experiments, are reviewed.

Published
2001

44. Recent results on pre-equilibrium GDR in heavy ion collisions

Author

M. Sandoli, F. Rizzo, A. Ordine, Vincenzo Roca, M. Trotta, M. Romoli, M. Di Pietro, G. Inglima, A. de Rosa, M. La Commara, A. Boiano, D. Pierroutsakou, L. Stroe, Pierroutsakou, D, Boiano, A, De Rosa, A, Di Pietro, M, Inglima, G, LA COMMARA, Marco, Ordine, A, Roca, Vincenzo, Romoli, M, Sandoli, M, Trotta, M, Rizzo, F, and Stroe, L.

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Heavy ion
Published
2001

45. Electron screening effect in the reactions 3He(d,p)4He and d(3He,p)4He

Author

R. Bonetti, Lucio Gialanella, C. Rolfs, Vincenzo Roca, Paolo Prati, M. Junker, Zs. Fülöp, A. Formicola, Mario R. Romano, A. Ordine, Gy. Gyürky, Gianluca Imbriani, Sandra Zavatarelli, H. P. Trautvetter, H. Costantini, P. Corvisiero, G. Gervino, Oscar Straniero, C. Gustavino, Marialuisa Aliotta, P.G. Moroni, Filippo Terrasi, A. Guglielmetti, E. Somorjai, Detlef Rogalla, Antonio D'Onofrio, Frank Strieder, L. Campajola, F. Schümann, Carlo Broggini, F. Raiola, M., Aliotta, F., Raiola, G., Gyurky, A., Formicola, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, H., Costantini, A., D'Onofrio, Z., Fulop, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, M., Junker, R. W., Kavanagh, P. G., Moroni, A., Ordine, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schumann, E., Somorijai, O., Straniero, F., Strieder, F., Terrasi, H. P. TRAUTVETTER AND S. Z. A. V. A. T. A. R. E. L. L., I., G., Gyürky, Z., Fülöp, F., Schümann, E., Somorjai, H. P., Trautvetter, and S., Zavatarelli

Subjects
Experimental Nuclear Physic, Physics, Nuclear physics, Nuclear and High Energy Physics, Electron screening, Screening effect, Nuclear Reactions, Nuclear astrophysics, Electron, Atomic physics, Potential energy, Dissociation (chemistry)
Abstract

The cross section of the reactions 3He(d, p) 4 He and d(3He, p)4He has been measured at the center-of-mass energies E=5 to 60 keV and 10 to 40 keV, respectively. The experiments were performed to determine the magnitude of the electron screening effect leading to the respective electron-screening potential energy U e =219±7 and 109±9 eV, which are both significantly higher than the respective values from atomic physics models, U e =120 and 65 eV.

Published
2001

46. The D(He-3, p)He-4 fusion reaction: electron screening effect and astrophysical S(E) factor at low energies

Author

C. Rolfs, R. Bonetti, F. Strieder, Antonio D'Onofrio, P. G. Prada Moroni, Gianluca Imbriani, F. Schümann, Sandra Zavatarelli, A. Ordine, H. Costantini, M. Junker, G. Gervino, Filippo Terrasi, Mario R. Romano, Detlef Rogalla, H. P. Trautvetter, L. Campajola, Vincenzo Roca, C. Gustavino, Paolo Prati, P. Corvisiero, A. Formicola, Lucio Gialanella, Carlo Broggini, A. Guglielmetti, S., Zavatarelli, P., Corvisiero, H., Costantini, P. G., Prada Moroni, P., Prati, R., Bonetti, A., Guglielmetti, C., Broggini, L., Campajola, A., Formicola, L., Gialanella, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, Romano, Mario, A., D'Onofrio, F., Terrasi, G., Gervino, C., Gustavino, M., Junker, D., Rogalla, C., Rolf, F., Schumann, F., Strieder, and H. P., Trautvetter

Subjects
Nuclear physics, Physics, Experimental Nuclear Physic, Nuclear and High Energy Physics, Screening effect, Nuclear Astrophysics, Nuclear fusion, Electron, Atomic physics, E factor, Nuclear Astrophysic, underground laboratory
Abstract

The D(He-3,p)He-4 cross section has been measured at E = 4.2 to 13.8 keV using the LUNA accelerator facility installed in the Gran Sasso National Laboratory (LNGS). The experimental setup and the interpretation of results in terms of electron screening potential are described. In the same experiment an estimate of the observed stopping power of the He-3 ions in D-2 target has been obtained and it turned out to be in good agreement with the standard compilation.

Published
2001

47. Measurements of dynamical dipole in isospin asymmetric fusion reactions

Author

A. Ordine, Gabriele Pasquali, S. Leoni, Domenico Santonocito, Giacomo Poggi, V. L. Kravchuk, M. D'Agostino, Giovanni Casini, C. Maiolino, T. Marchi, Luca Morelli, C. Rizzo, A. Bracco, S. Brambilla, V Vannini, G. Benzoni, M. Ciemala, F. Camera, S. Carboni, A. Giaz, Silvia Piantelli, M. Bruno, M. Kmiecik, M. Di Toro, M. Degelier, V. Vandone, B. Million, A. Nannini, O. Wieland, W Menczynski, N. Blasi, Giorgio Baiocco, D. Montanari, M. Cinausero, P. Bednarcyk, K. Mazurek, Maria Colonna, Alessandra Corsi, F. C. L. Crespi, R. Alba, L. Bardelli, F. Gramegna, Maurizio Bini, A. Maj, R. Nicolini, Massimo Chiari, Sandro Barlini, and V. Rizzi

Subjects
Physics, Nuclear reaction, History, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Asymmetry, Computer Science Applications, Education, Nuclear physics, Dipole, Physics and Astronomy (all), Nucleosynthesis, Yield (chemistry), Isospin, Nuclear fusion, Atomic physics, Nuclear Experiment, media_common, Oxygen-16
Abstract

In heavy ion nuclear reactions the process leading to complete fusion is expected to produce pre-equilibrium γ-ray emission, if particular conditions are met. Indeed, when there is an N/Z asymmetry between projectile and target, charge equilibration takes place with a collective dipole oscillation, called Dynamical Dipole (DD), associated to a γ-ray emission. The existing experimental data concerning this pre-equilibrium γ-ray emission are still rather scarce and manly concentrated in the A≊132 mass region. The very preliminary results concerning the measurement of the DD γ-ray emission in the fusion reaction 16O (Elab=192 MeV) + 116Sn at 12 MeV/u will be presented and compared with the γ yield measured for the same reaction at 8.1 and 15.6 MeV/u. The present experiment aims at the measurement of the total emission yield of the DD at 12 MeV/u where the predicted theoretical yield does not completely reproduce the experimental data. The experiment has been performed at the INFN Legnaro Laboratories using the GARFIELD-HECTOR array.

Published
2012

48. An interpretation of staggering effects by correlation observables

Author

F. Cannata, E. Geraci, Luca Morelli, M. Bruno, Giorgio Baiocco, Tommaso Marchi, A. Ordine, A. Moroni, V. L. Kravchuk, Sandro Barlini, L. Bardelli, Adriana Raduta, Giovanni Casini, F. Gramegna, M. D'Agostino, Francesca Gulminelli, 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), 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
Physics, 010308 nuclear & particles physics, QC1-999, education, Observable, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Interpretation (model theory), Correlation, Nuclear physics, Correlation function, Pairing, 0103 physical sciences, Statistical physics, 010306 general physics, Nuclear Experiment
Abstract

International audience; The reactions 32S+58,64Ni are studied at 14.5 A MeV. Evidence is found for odd-even effects in isotopic observables of the decay of a projectile-like source. The influence of secondary decays on the staggering is studied with a correlation function technique, showing that odd-even effects are due to interplay between pairing effects in the nuclear masses and in the level densities.

Published
2011
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49. Stellar and Primordial Nucleosynthesis ofBe7: Measurement ofHe3(α,γ)Be7

Author

R. Kunz, Gyuri Gyürky, D. Schürmann, Antonio D'Onofrio, Mario R. Romano, Frank Strieder, Lucio Gialanella, Gianluca Imbriani, Gianpiero Mangano, Filippo Terrasi, N. De Cesare, M. De Cesare, A. Di Leva, Detlef Rogalla, Zs. Fülöp, C. Rolfs, Vincenzo Roca, A. Ordine, and E. Somorjai

Subjects
Nuclear physics, Physics, Cross section (physics), Big Bang nucleosynthesis, Nucleosynthesis, Solar neutrino, Nuclear astrophysics, General Physics and Astronomy, Flux, Absolute value, Nuclear Experiment, Coincidence
Abstract

The 3He(alpha,gamma)7Be reaction presently represents the largest nuclear uncertainty in the predicted solar neutrino flux and has important implications on the big bang nucleosynthesis, i.e., the production of primordial 7Li. We present here the results of an experiment using the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the 7Be ejectiles. In addition, off-beam activation and coincidence gamma-ray measurements were performed at selected energies. At energies above 1 MeV a large discrepancy compared to previous results is observed both in the absolute value and in the energy dependence of the cross section. Based on the available data and models, a robust estimate of the cross section at the astrophysical relevant energies is proposed.

Published
2009
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50. Fission dynamics In [sup 132]Ce composite nuclei at E[sub x] = 122 MeV

Author

A. Di Nitto, P. N. Nadtochy, A. Brondi, G. La Rana, R. Moro, E. Vardaci, A. Ordine, A. Boiano, M. Cinausero, G. Prete, V. Rizzi, N. Gelli, F. Lucarelli, G. N. Knyazheva, E. M. Kozulin, Audrey Chatillon, Herbert Faust, Gabriele Fioni, Dominique Goutte, and Héloise Goutte

Subjects
Nuclear physics, Physics, Viscosity, Cluster decay, Fission, Mass spectrum, Observable, Alpha decay, Dissipation, Atomic physics, Nuclear Experiment, Charged particle
Abstract

We are carrying out a research program with the 8πLP apparatus at the Laboratori Nazionali di Legnaro (Italy), aimed at studying fission dynamics in systems of intermediate fissility. These systems, compared to the heavier ones, are characterized by larger pre‐scission charged particle multiplicities as well as by comparable fission and evaporation residue cross sections. Therefore, the measurement of observables in both channels allows putting severe constraints on the models, in order to obtain more reliable information on the dynamics of the process. We present the results for the composite system 122Ce, produced at Ex = 122 MeV in 200 MeV 32S+100Mo reaction. The comparison of the data with the predictions of a dynamical model, based on 3‐D Langevin equations, indicates that full one‐body dissipation plays a dominant role in the fission process, with a viscosity parameter independent from the temperature and a fission delay of ∼25*10−21 s.

Published
2009
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