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99 results on '"Neidherr, D."'

1. First glimpse of the $N=82$ shell closure below $Z=50$ from masses of neutron-rich cadmium isotopes and isomers

Author

Manea, V., Karthein, J., Atanasov, D., Bender, M., Blaum, K., Cocolios, T. E., Eliseev, S., Herlert, A., Holt, J. D., Huang, W. J., Litvinov, Yu. A., Lunney, D., Menéndez, J., Mougeot, M., Neidherr, D., Schweikhard, L., Schwenk, A., Simonis, J., Welker, A., Wienholtz, F., and Zuber, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

We probe the $N=82$ nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with the ISOLTRAP spectrometer at ISOLDE-CERN. The new mass of $^{132}$Cd offers the first value of the $N=82$, two-neutron shell gap below $Z=50$ and confirms the phenomenon of mutually enhanced magicity at $^{132}$Sn. Using the recently implemented phase-imaging ion-cyclotron-resonance method, the ordering of the low-lying isomers in $^{129}$Cd and their energies are determined. The new experimental findings are used to test large-scale shell-model, mean-field and beyond-mean-field calculations, as well as the ab initio valence-space in-medium similarity renormalization group., Comment: 7 pages, 5 figures; reference added, minor editorial corrections

Published
2020
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2. Study of the long-lived excited state in the neutron deficient nuclides $^{195,197,199}$Po by precision mass measurement

Author

Althubiti, N. A., Atanasov, D., Blaum, K., Cocolios, T. E., Goodacre, T. Day, Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., George, S., Herfurth, F., Heyde, K., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Neidherr, D., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Welker, A., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

Direct mass measurements of the low-spin $3/2^{(-)}$ and high-spin $13/2^{(+)}$ states in the neutron-deficient isotopes $^{195}$Po, $^{197}$Po, and high-spin $13/2^{(+)}$ state in $^{199}$Po were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the $\nu$i$_{13/2}$ orbital in $^{195,197}$Po. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from $\alpha$-decay chains. The new excitation energies complete the knowledge of the energy systematics in the region and confirm for the first time that the $13/2^{(+)}$ states remain isomeric, independent of the number of valence neutrons.

Published
2017
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3. Precision Mass Measurements of 129-131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

Author

Atanasov, D., Ascher, P., Blaum, K., Cakirli, R. B., Cocolios, T. E., George, S., Herfurth, F., Kisler, D., Kowalska, M., Kreim, S., Litvinov, Yu. A., Lunney, D., Manea, V., Neidherr, D., Rosenbusch, M., Schweikhard, L., Welker, A., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

Masses adjacent to the classical waiting-point nuclide 130Cd have been measured by using the Penning- trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N = 82 shell gap below the doubly magic 132Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A = 128 - 132 region and a reduction of the uncertainties from the precision mass input data.

Published
2015
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4. Probing the N = 32 shell closure below the magic proton number Z = 20: Mass measurements of the exotic isotopes 52,53K

Author

Rosenbusch, M., Ascher, P., Atanasov, D., Barbieri, C., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R. B., Cipollone, A., George, S., Herfurth, F., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Schweikhard, L., Somà, V., Stanja, J., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The recently confirmed neutron-shell closure at N = 32 has been investigated for the first time below the magic proton number Z = 20 with mass measurements of the exotic isotopes 52,53K, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N = 32, slightly lower than for 52Ca, highlighting the doubly-magic nature of this nuclide. Skyrme-Hartree-Fock-Boguliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect., Comment: 5 pages, 5 figures

Published
2015
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5. High-Energy Laser Facility PHELIX at GSI: Latest Advances and Extended Capabilities

Author

Major, Zs., primary, Eisenbarth, U., additional, Zielbauer, B., additional, Brabetz, C., additional, Ohland, J. B., additional, Zobus, Y., additional, Roeder, S., additional, Reemts, D., additional, Kunzer, S., additional, Götte, S., additional, Neidherr, D., additional, Hornung, J., additional, Kewes, P., additional, Schumacher, D., additional, Beck, D., additional, Hesselbach, P., additional, Malki, M., additional, Neumayer, P., additional, Weyrich, K., additional, Tauschwitz, A., additional, and Bagnoud, V., additional

Published
2024
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6. Penning trap mass measurements on (99-109)$Cd with ISOLTRAP and implications on the rp process

Author

Breitenfeldt, M., Audi, G., Beck, D., Blaum, K., George, S., Herfurth, F., Herlert, A., Kellerbauer, A., Kluge, H. -J., Kowalska, M., Lunney, D., Naimi, S., Neidherr, D., Schatz, H., Schwarz, S., and Schweikhard, L.

Subjects
Nuclear Experiment
Abstract

Penning trap mass measurements on neutron-deficient Cd isotopes (99-109)Cd have been performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN, all with relative mass uncertainties below 3*10^8. A new mass evaluation has been performed. The mass of 99Cd has been determined for the first time which extends the region of accurately known mass values towards the doubly magic nucleus 100Sn. The implication of the results on the reaction path of the rp process in stellar X-ray bursts is discussed. In particular, the uncertainty of the abundance and the overproduction created by the rp-process for the mass A = 99 is demonstrated by reducing the uncertainty of the proton-separation energy of 100In Sp(100In) by a factor of 2.5., Comment: 14 pages, 9 figures

Published
2009
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7. TRIGA-SPEC: A setup for mass spectrometry and laser spectroscopy at the research reactor TRIGA Mainz

Author

Ketelaer, J., Krämer, J., Beck, D., Blaum, K., Block, M., Eberhardt, K., Eitel, G., Ferrer, R., Geppert, C., George, S., Herfurth, F., Ketter, J., Nagy, Sz., Neidherr, D., Neugart, R., Nörtershäuser, W., Repp, J., Smorra, C., Trautmann, N., and Weber, C.

Subjects
Nuclear Experiment
Abstract

The research reactor TRIGA Mainz is an ideal facility to provide neutron-rich nuclides with production rates sufficiently large for mass spectrometric and laser spectroscopic studies. Within the TRIGA-SPEC project, a Penning trap as well as a beam line for collinear laser spectroscopy are being installed. Several new developments will ensure high sensitivity of the trap setup enabling mass measurements even on a single ion. Besides neutron-rich fission products produced in the reactor, also heavy nuclides such as 235-U or 252-Cf can be investigated for the first time with an off-line ion source. The data provided by the mass measurements will be of interest for astrophysical calculations on the rapid neutron-capture process as well as for tests of mass models in the heavy-mass region. The laser spectroscopic measurements will yield model-independent information on nuclear ground-state properties such as nuclear moments and charge radii of neutron-rich nuclei of refractory elements far from stability. This publication describes the experimental setup as well as its present status., Comment: 20 pages, 17 figures

Published
2008
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12. PUMA, antiProton unstable matter annihilation

Author

Aumann, T., Bartmann, W., Boine-Frankenheim, O., Bouvard, A., Broche, A., Butin, F., Calvet, D., Carbonell, J., Chiggiato, P., de Gersem, H., de Oliveira, R., Dobers, T., Ehm, F., Somoza, J.Ferreira, Fischer, J., Fraser, M., Friedrich, E., Frotscher, A., Gomez-Ramos, M., Grenard, J.L., Hobl, A., Hupin, G., Husson, A., Indelicato, P., Johnston, K., Klink, C., Kubota, Y., Lazauskas, R., Malbrunot-Ettenauer, S., Marsic, N., O Müller, W.F., Naimi, S., Nakatsuka, N., Necca, R., Neidherr, D., Neyens, G., Obertelli, A., Ono, Y., Pasinelli, S., Paul, N., Pollacco, E.C., Rossi, D., Scheit, H., Schlaich, M., Schmidt, A., Schweikhard, L., Seki, R., Sels, S., Siesling, E., Uesaka, T., Vilén, M., Wada, M., Wienholtz, F., Wycech, S., Zacarias, S., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Kastler Brossel (LKB [Collège de France]), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and PUMA

Subjects
CERN Lab, experimental methods, Nuclear Theory, p: density, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], sensitivity, annihilation, nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Physics - Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics::Atomic Physics, nucleus: density, Detectors and Experimental Techniques, nucleus: surface, Nuclear Experiment, activity report
Abstract

International audience; PUMA, antiProton Unstable Matter Annihilation, is a nuclear-physics experiment at CERN aiming at probing the surface properties of stable and rare isotopes by use of low-energy antiprotons. Low-energy antiprotons offer a very unique sensitivity to the neutron and proton densities at the annihilation site, i.e. in the tail of the nuclear density. Today, no facility provides a collider of low-energy radioactive ions and low-energy antiprotons: while not being a collider experiment, PUMA aims at transporting one billion antiprotons from ELENA, the Extra-Low-ENergy Antiproton ring, to ISOLDE, the rare-isotope beam facility of CERN. PUMA will enable the capture of low-energy antiprotons by short-lived nuclei and the measurement of the emitted radiations. In this way, PUMA will give access to the so-far largely unexplored isospin composition of the nuclear-radial-density tail of radioactive nuclei. The motivations, concept and current status of the PUMA experiment are presented.

Published
2022
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13. Masses of exotic calcium isotopes pin down nuclear forces

Author

Wienholtz, F., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R.B., George, S., Herfurth, F., D.Holt, J., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Menendez, J., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Simonis, J., Stanja, J., Wolf, R.N., and Zuber, K.

Subjects
Research, Properties, Calcium (Chemical element) -- Properties, Isotopes -- Properties, Fundamental forces (Physics) -- Research, Calcium -- Properties, Nuclear forces (Physics) -- Research
Abstract

Exotic nuclei with extreme neutron-to-proton asymmetries exhibit shell structures generated by unexpected orderings of shell occupations. Their description poses enormous challenges, because most theoretical models have been developed for nuclei [...], The properties of exotic nuclei on the verge of existence play a fundamental part in our understanding of nuclear interactions (1). Exceedingly neutron-rich nuclei become sensitive to new aspects of nuclear forces (2). Calcium, with its doubly magic isotopes [sup.40]Ca and [sup.48]Ca, is an ideal test for nuclear shell evolution, from the valley of stability to the limits of existence. With a closed proton shell, the calcium isotopes mark the frontier for calculations with three-nucleon forces from chiral effective field theory (3-6). Whereas predictions for the masses of [sup.51]Ca and [sup.52]Ca have been validated by direct measurements (4), it is an open question as to how nuclear masses evolve for heavier calcium isotopes. Here we report the mass determination of the exotic calcium isotopes [sup.53]Ca and [sup.54]Ca, using the multi-reflection time-of-flight mass spectrometer (7) of ISOLTRAP at CERN. The measured masses unambiguously establish a prominent shell closure at neutron number N= 32, in excellent agreement with our theoretical calculations. These results increase our understanding of neutron-rich matter and pin down the subtle components of nuclear forces that are at the forefront of theoretical developments constrained by quantum chromodynamics (8).

Published
2013

14. Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar

Author

Mougeot, M., Atanasov, D., Barbieri, C., Blaum, K., Breitenfeld, M., De Roubin, A., Duguet, T., George, S., Herfurth, F., Herlert, A., Holt, J.D., Karthein, J., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Somà, V., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], nucl-th, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, nucl-ex, Nuclear Theory (nucl-th), Nuclear Physics - Theory, Physics::Atomic and Molecular Clusters, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

The strength of the $N$ = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of $^{46-48}$Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the $N$ = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the \emph{SDPF-U} phenomenological shell model interaction. Our results are also compared with \emph{ab initio} calculations using the Valence Space In-Medium Similarity Renormalization Group and the Self-Consistent Green's Function approaches. Both calculations provide a very good account of mass systematics at and around $Z$ = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that $^{46}$Ar is the transition between the closed-shell $^{48}$Ca and collective $^{44}$S., 17 pages, 14 figures

Published
2020
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15. Examining the N=28 shell closure through high-precision mass measurements of Ar46-48

Author

Mougeot, M, Atanasov, D, Barbieri, C, Blaum, K, Breitenfeld, M, de Roubin, A, Duguet, T, George, S, Herfurth, F, Herlert, A, Holt, JD, Karthein, J, Lunney, D, Manea, V, Navratil, P, Neidherr, D, Rosenbusch, M, Schweikhard, L, Schwenk, A, Soma, V, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
CHARGE RADII, MODEL, ENERGY, Science & Technology, Physics, Nuclear, NUCLEI, SPECTROMETRY, MOMENTS, Physics, NEUTRON-RICH ISOTOPES, Physical Sciences, ATOMIC MASS, TRAP
Abstract

ispartof: PHYSICAL REVIEW C vol:102 issue:1 status: published

Published
2020

16. Shape coexistence in $^187Au$ studied by laser spectroscopy

Author

Barzakh, A. E., Atanasov, D., Andreyev, A. N., Monthery, M. Al, Althubiti, N. A., Andel, B., Antalic, S., Blaum, K., Cocolios, T. E., Cubiss, J. G., Van Duppen, P., Goodacre, T. Day, de Roubin, A., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Fink, D. A., Gaffney, L. P., Ghys, L., Harding, R. D., Huyse, M., Imai, N., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Palenzuela, Y. Martinez, Molkanov, P. L., Neidherr, D., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Sels, S., Van Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R. N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Physics::Atomic and Molecular Clusters, ddc:530, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Präzisionsexperimente - Abteilung Blaum, Nuclear Structure
Abstract

Physical review / C 101(6), 064321 (2020). doi:10.1103/PhysRevC.101.064321, Published by APS, Woodbury, NY

Published
2020
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17. Erratum: QEC-value determination for 21Na → 21Ne and 23Mg → 23 Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility [Phys. Rev. C 100, 015502 (2019)

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Published
2020

18. Hyperfine anomaly in gold and magnetic moments of Iπ=11/2− gold isomers

Author

Barzakh, A., Atanasov, D., Andreyev, A., Al Monthery, M., Althubiti, N., Andel, B., Antalic, S., Blaum, K., Cocolios, T., Cubiss, J., Duppen, P., Goodacre, T., de Roubin, A., Demidov, Y., Farooq-Smith, G., Fedorov, D., Fedosseev, V., Fink, D., Gaffney, L., Ghys, L., Harding, R., Joss, D., Herfurth, F., Huyse, M., Imai, N., Kozlov, M., Kreim, S., Lunney, D., Lynch, K., Manea, V., Marsh, B., Palenzuela, Y., Molkanov, P., Neidherr, D., Page, R., Rosenbusch, M., Rossel, R., Rothe, S., Schweikhard, L., Seliverstov, M., Sels, S., Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

ispartof: Physical Review C vol:101 issue:3 pages:034308-1-034308-9 status: published

Published
2020

19. Q(EC)-value determination for Na-21 -> Ne-21 and Mg-23 -> Na-23 mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility

Author

Karthein, J, Atanasov, D, Blaum, K, Breitenfeldt, M, Bondar, V, George, S, Hayen, L, Lunney, D, Manea, V, Mougeot, M, Neidherr, D, Schweikhard, L, Severijns, N, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
Science & Technology, Physics, Nuclear, Physics, Physical Sciences, ION-SOURCE, TRAP
Abstract

ispartof: PHYSICAL REVIEW C vol:100 issue:1 status: published

Published
2019

20. QEC-value determination for 21Na→21Ne and 23Mg→23Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at ISOLDE/CERN

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

We report on high-precision $Q_{\textrm{EC}}$ values of the $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror $\beta$-transitions from mass measurements with ISOLTRAP at ISOLDE/CERN. A precision of $\delta m/m = 9 \cdot 10^{-10}$ and $\delta m/m = 1.5 \cdot 10^{-9}$ was reached for the masses of $^{21}$Na and $^{23}$Mg, respectively. We reduce the uncertainty of the $Q_{\textrm{EC}}$ values by a factor five, making them the most precise experimental input data for the calculation of the corrected $\mathcal{F} t$-value of these mixed Fermi/Gamow-Teller transitions. For the $^{21}$Na$\rightarrow^{21}$Ne $Q_{\textrm{EC}}$ value, a $2.3 \sigma$ deviation from the literature $Q_{\textrm{EC}}$-value was found.

Published
2019

21. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in At-217,At-218,At-219 revealed by in-source laser spectroscopy

Author

Barzakh, AE, Cubiss, JG, Andreyev, AN, Seliverstov, MD, Andel, B, Antalic, S, Ascher, P, Atanasov, D, Beck, D, Bieron, J, Blaum, K, Borgmann, Ch, Breitenfeldt, M, Capponi, L, Cocolios, TE, Goodacre, T Day, Derkx, X, De Witte, H, Elseviers, J, Fedorov, DV, Fedosseev, VN, Fritzsche, S, Gaffney, LP, George, S, Ghys, L, Hessberger, FP, Huyse, M, Imai, N, Kalaninova, Z, Kisler, D, Koester, U, Kowalska, M, Kreim, S, Lane, JFW, Liberati, V, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Mitsuoka, S, Molkanov, PL, Nagame, Y, Neidherr, D, Nishio, K, Ota, S, Pauwels, D, Popescu, L, Radulov, D, Rapisarda, E, Revi, JP, Rosenbusch, M, Rossel, RE, Rothe, S, Sandhu, K, Schweikhard, L, Sels, S, Truesdale, VL, Van Beveren, C, Van den Bergh, P, Van Duppen, P, Wakabayashi, Y, Wendt, KDA, Wienholtz, F, Whitmore, BW, Wilson, GL, Wolf, RN, and Zuber, K

Published
2019

22. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217,218,219At revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroifmmode nelse, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, V. N., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J. F. W., Liberati, V., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Subjects
Physics::Atomic Physics, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in At217,218,219 have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope At218 has been found to be larger than the average of its even-N neighbors, At217,219. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of At218 also supports the possible presence of octupole collectivity in the considered nuclei. ispartof: Physical Review C vol:99 issue:5 status: published

Published
2019

23. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217,218,219}At$ revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Adel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, Jacek, Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derex, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, N. V., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Koster, U., Kowalska, M., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulow, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Published
2019

24. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217,218,219}\mathrm{At}$ revealed by in-source laser spectroscopy

Author

Barzakh, A.E., Cubiss, J.G., Andreyev, A.N., Seliverstov, M.D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T.E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D.V., Fedosseev, V.N., Fritzsche, S., Gaffney, L.P., George, S., Ghys, L., Heßberger, F.P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J.F.W., Liberati, V., Lunney, D., Lynch, K.M., Manea, V., Marsh, B.A., Mitsuoka, S., Molkanov, P.L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J.P., Rosenbusch, M., Rossel, R.E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V.L., Van Beveren, C., Van Den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K.D.A., Wienholtz, F., Whitmore, B.W., Wilson, G.L., Wolf, R.N., Zuber, K., 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 Laue-Langevin (ILL), ILL, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear Physics - Experiment, Physics::Atomic Physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Structure
Abstract

International audience; Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in $^{217,218,219}$At have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope $^{218}$At has been found to be larger than the average of its even-$N$ neighbors, $^{217,219}$At. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of $^{218}$At also supports the possible presence of octupole collectivity in the considered nuclei.

Published
2019
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25. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in $^{217 , 218 , 219}$At revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, V. N., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Hessberger, Fritz-Peter, Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J. F. W., Liberati, V., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van Den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Subjects
ddc:530
Abstract

Physical review / C covering nuclear physics 99(5), 054317 (2019). doi:10.1103/PhysRevC.99.054317, Published by Inst., Woodbury, NY

Published
2019
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26. Change in structure between the = 1/2 States in Tl and Au

Author

Cubiss, J.G., Barzakh, A.E., Andreyev, A.N., Al Monthery, M., Althubiti, N., Andel, B., Antalic, S., Atanasov, D., Blaum, K., Cocolios, T.E., Day Goodacre, T., de Groote, R.P., de Roubin, A., Farooq-Smith, G.J., Fedorov, D.V., Fedosseev, V.N., Ferrer, R., Fink, D.A., Gaffney, L.P., Ghys, L., Gredley, A., Harding, R.D., Herfurth, F., Huyse, M., Imai, N., Joss, D.T., Köster, U., Kreim, S., Liberati, V., Lunney, D., Lynch, K.M., Manea, V., Marsh, B.A., Martinez Palenzuela, Y., Molkanov, P.L., Mosat, P., Neidherr, D., O'Neill, G.G., Page, R.D., Procter, T.J., Rapisarda, E., Rosenbusch, M., Rothe, S., Sandhu, K., Schweikhard, L., Seliverstov, M.D., Sels, S., Spagnoletti, P., Truesdale, V.L., Van Beveren, C., Van Duppen, P., Veinhard, M., Venhart, M., Veselský, M., Wearing, F., Welker, A., Wienholtz, F., Wolf, R.N., Zemlyanoy, S.G., and Zuber, K.

Abstract

The first accurate measurements of the α-decay branching ratio and half-life of the Iπ=1/2+ ground state in $^{181}$Tl have been made, along with the first determination of the magnetic moments and I=1/2 spin assignments of the ground states in $^{177,179}$Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, Iπ=1/2+ states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2+→1/2+, $^{181}$Tl→g177Au$^{g}$ α decay, which is explained by a mixing of π3s1/2 and π2d3/2 configurations in $^{177}$Au$^{g}$, whilst $^{181}$Tl$^{g}$ remains a near-pure π3s1/2. This conclusion is inferred from the g factor of $^{177}$Au$^{g}$ which has an intermediate value between those of π3s1/2 and π2d3/2 states. A similar mixed configuration is proposed for the Iπ=1/2+ ground state of $^{179}$Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.

Published
2018

27. Precision Mass Measurements of Cr58-63: Nuclear Collectivity Towards the N=40 Island of Inversion

Author

Mougeot, M, Atanasov, D, Blaum, K, Chrysalidis, K, Goodacre, T Day, Fedorov, D, Fedosseev, V, George, S, Herfurth, F, Holt, JD, Lunney, D, Manea, V, Marsh, B, Neidherr, D, Rosenbusch, M, Rothe, S, Schweikhard, L, Schwenk, A, Seiffert, C, Simonis, J, Stroberg, SR, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
Science & Technology, SPECTROMETRY, Physics, FEATURES, Physical Sciences, Physics, Multidisciplinary, LASER ION-SOURCE, FACILITY, PENNING TRAP, FORCES, Nuclear Experiment, CALCIUM ISOTOPES
Abstract

The neutron-rich isotopes ^{58-63}Cr were produced for the first time at the ISOLDE facility and their masses were measured with the ISOLTRAP spectrometer. The new values are up to 300 times more precise than those in the literature and indicate significantly different nuclear structure from the new mass-surface trend. A gradual onset of deformation is found in this proton and neutron midshell region, which is a gateway to the second island of inversion around N=40. In addition to comparisons with density-functional theory and large-scale shell-model calculations, we present predictions from the valence-space formulation of the ab initio in-medium similarity renormalization group, the first such results for open-shell chromium isotopes. ispartof: PHYSICAL REVIEW LETTERS vol:120 issue:23 ispartof: location:United States status: published

Published
2018

28. Charge radii and electromagnetic moments of $^{195--211}\mathrm{At}$

Author

Cubiss, JG, Barzakh, AE, Seliverstov, MD, Andreyev, AN, Andel, B, Antalic, S, Ascher, P, Atanasov, D, Beck, D, Bieroń, J, Blaum, K, Borgmann, C, Breitenfeldt, M, Capponi, L, Cocolios, TE, Day Goodacre, T, Derkx, X, De Witte, H, Elseviers, J, Fedorov, DV, Fedosseev, VN, Fritzsche, S, Gaffney, LP, George, S, Ghys, L, Heßberger, FP, Huyse, M, Imai, N, Kalaninová, Z, Kisler, D, Köster, U, Kowalska, M, Kreim, S, Lane, JFW, Liberati, V, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Mitsuoka, S, Molkanov, PL, Nagame, Y, Neidherr, D, Nishio, K, Ota, S, Pauwels, D, Popescu, L, Radulov, D, Rapisarda, E, Revill, JP, Rosenbusch, M, Rossel, RE, Rothe, S, Sandhu, K, Schweikhard, L, Sels, S, Truesdale, VL, Van Beveren, C, Van den Bergh, P, Wakabayashi, Y, Van Duppen, P, Wendt, KDA, Wienholtz, F, Whitmore, BW, Wilson, GL, Wolf, RN, and Zuber, K

Subjects
Nuclear Experiment
Abstract

© 2018 authors. Hyperfine-structure parameters and isotope shifts of At195-211 have been measured for the first time at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy method. The hyperfine structures of isotopes were recorded using a triad of experimental techniques for monitoring the photo-ion current. The Multi-Reflection Time-of-Flight Mass Spectrometer, in connection with a high-resolution electron multiplier, was used as an ion-counting setup for isotopes that either were affected by strong isobaric contamination or possessed a long half-life; the ISOLDE Faraday cups were used for cases with high-intensity beams; and the Windmill decay station was used for short-lived, predominantly α-decaying nuclei. The electromagnetic moments and changes in the mean-square charge radii of the astatine nuclei have been extracted from the measured hyperfine-structure constants and isotope shifts. This was only made possible by dedicated state-of-the-art large-scale atomic computations of the electronic factors and the specific mass shift of atomic transitions in astatine that are needed for these extractions. By comparison with systematics, it was possible to assess the reliability of the results of these calculations and their ascribed uncertainties. A strong deviation in the ground-state mean-square charge radii of the lightest astatine isotopes, from the trend of the (spherical) lead isotopes, is interpreted as the result of an onset of deformation. This behavior bears a resemblance to the deviation observed in the isotonic polonium isotopes. Cases for shape coexistence have been identified in At197,199, for which a significant difference in the charge radii for ground (9/2-) and isomeric (1/2+) states has been observed. ispartof: Physical Review C vol:97 issue:5 status: Published online

Published
2018

29. Precision Mass Measurement of $^{58-63}$Cr: Nuclear Collectivity towards the $N=40$ Island of Inversion

Author

Mougeot, M., Atanasov, D., Blaum, K., Chrysalidis, K., Day Goodacre, T., Fedorov, D., Fedosseev, V., George, S., Herfurth, F., Holt, J.D., Lunney, D., Manea, V., Marsh, B., Neidherr, D., Rosenbusch, M., Rothe, S., Schweikhard, L., Schwenk, A., Seiffert, C., Simonis, J., Stroberg, S.R., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and 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)

Subjects
Nuclear Theory (nucl-th), Nuclear Theory, nucl-th, Nuclear Physics - Theory, Physics::Atomic and Molecular Clusters, FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Experiment
Abstract

The neutron-rich isotopes $^{58-63}$Cr were produced for the first time at the ISOLDE facility and their masses were measured with the ISOLTRAP spectrometer. The new values are up to 300 times more precise than those in the literature and indicate significantly different nuclear structure from the new mass-surface trend. A gradual onset of deformation is found in this proton and neutron mid-shell region, which is a gateway to the second island of inversion around \emph{N}=40. In addition to comparisons with density-functional theory and large-scale shell-model calculations, we present predictions from the valence-space formulation of the \emph{ab initio} in-medium similarity renormalization group, the first such results for open-shell chromium isotopes., Comment: 6 pages, 3 figures, 1 table

Published
2018
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30. Precision Mass Measurements of $^{58 – 63}$Cr : Nuclear Collectivity Towards the N = 40 Island of Inversion

Author

Mougeot, M., Atanasov, D., Blaum, K., Chrysalidis, K., Day Goodacre, T., Fedorov, D., Fedosseev, V., George, S., Herfurth, F., Holt, J., Lunney, D., Manea, V., Marsh, B., Neidherr, D., Rosenbusch, M., Rothe, S., Schweikhard, L., Schwenk, A., Seiffert, C., Simonis, J., Stroberg, S., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
ddc:550, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

Physical review letters 120(23), 232501 (2018). doi:10.1103/PhysRevLett.120.232501, Published by APS, College Park, Md.

Published
2018
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31. Charge radii and electromagnetic moments of $^{195 – 211}$At

Author

Cubiss, J. G., Barzakh, A. E., Seliverstov, M. D., Andreyev, A. N., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroń, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L, Cocolios, T. E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, V N, Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J. F. W., Liberati, V., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R.E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Wakabayashi, Y., Van Duppen, P., Wendt, K.D.A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R.N., Zuber, K, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Laue-Langevin (ILL), ILL, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ddc:530, Physics::Atomic Physics, Präzisionsexperimente - Abteilung Blaum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Physical review / C 97(5), 054327 (2018). doi:10.1103/PhysRevC.97.054327, Published by Inst., Woodbury, NY

Published
2018
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32. The binding energy of 79Cu: probing the structure of the doubly magic 78Ni from only one proton away

Author

Welker, A., Althubiti, N., Atanasov, D., Blaum, K., Cocolios, T., Herfurth, F., Kreim, S., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Nowacki, F., Poves, A., Rosenbusch, M., Schweikhard, L., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

The masses of the neutron-rich copper isotopes 75–79Cu are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the Z=28, N=50 nuclide 78Ni and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic 78Ni and a new island of inversion for Z

Published
2017

33. Binding Energy of Cu 79:Probing the Structure of the Doubly Magic Ni 78 from only One Proton Away

Author

Welker, A., Althubiti, N. A.S., Atanasov, D., Blaum, K., Cocolios, T. E., Herfurth, F., Kreim, S., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Nowacki, F., Poves, A., Rosenbusch, M., Schweikhard, L., Wienholtz, F., Wolf, R. N., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

The masses of the neutron-rich copper isotopes Cu75-79 are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the Z=28, N=50 nuclide Ni78 and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic Ni78 and a new island of inversion for Z

Published
2017
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34. Binding Energy of Cu-79: Probing the Structure of the Doubly Magic Ni-78 from Only One Proton Away

Author

Welker, A, Althubiti, NAS, Atanasov, D, Blaum, K, Cocolios, Thomas Elias, Herfurth, F, Kreim, S, Lunney, D, Manea, V, Mougeot, M, Neidherr, D, Nowacki, F, Poves, A, Rosenbusch, M, Schweikhard, L, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
magic numbers, copper, Nuclear Experiment, radioactive ions, mass spectrometry
Abstract

The masses of the neutron-rich copper isotopes 75–79Cu are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the Z=28, N=50 nuclide 78Ni and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic 78Ni and a new island of inversion for Z

Published
2017

35. Erratum: Masses of exotic calcium isotopes pin down nuclear forces

Author

Wienholtz, F., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R. B., George, S., Herfurth, F., Holt, J. D., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Menéndez, J., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Simonis, J., Stanja, J., Wolf, R. N., and Zuber, K.

Published
2013
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36. Change in structure between the I = 1/2 states in 181Tl and 177,179Au

Author

Cubiss, J.G., primary, Barzakh, A.E., additional, Andreyev, A.N., additional, Al Monthery, M., additional, Althubiti, N., additional, Andel, B., additional, Antalic, S., additional, Atanasov, D., additional, Blaum, K., additional, Cocolios, T.E., additional, Day Goodacre, T., additional, de Groote, R.P., additional, de Roubin, A., additional, Farooq-Smith, G.J., additional, Fedorov, D.V., additional, Fedosseev, V.N., additional, Ferrer, R., additional, Fink, D.A., additional, Gaffney, L.P., additional, Ghys, L., additional, Gredley, A., additional, Harding, R.D., additional, Herfurth, F., additional, Huyse, M., additional, Imai, N., additional, Joss, D.T., additional, Köster, U., additional, Kreim, S., additional, Liberati, V., additional, Lunney, D., additional, Lynch, K.M., additional, Manea, V., additional, Marsh, B.A., additional, Martinez Palenzuela, Y., additional, Molkanov, P.L., additional, Mosat, P., additional, Neidherr, D., additional, O'Neill, G.G., additional, Page, R.D., additional, Procter, T.J., additional, Rapisarda, E., additional, Rosenbusch, M., additional, Rothe, S., additional, Sandhu, K., additional, Schweikhard, L., additional, Seliverstov, M.D., additional, Sels, S., additional, Spagnoletti, P., additional, Truesdale, V.L., additional, Van Beveren, C., additional, Van Duppen, P., additional, Veinhard, M., additional, Venhart, M., additional, Veselský, M., additional, Wearing, F., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R.N., additional, Zemlyanoy, S.G., additional, and Zuber, K., additional

Published
2018
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37. Spectroscopy of the long-lived excited state in the neutron-deficient nuclides 195Po, 197Po, 199Po by precision mass measurements

Author

Althubiti, NA, Atanasov, D, Blaum, K, Cocolios, TE, Goodacre, T Day, Farooq-Smith, GJ, Fedorov, DV, Fedosseev, VN, George, S, Herfurth, F, Heyde, Kristiaan, Kreim, S, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Neidherr, D, Rosenbusch, M, Rossel, RE, Rothe, S, Schweikhard, L, Seliverstov, MD, Welker, A, Wienholtz, F, Wolf, RN, and Zuber, K

Subjects
CHARGE RADII, Physics and Astronomy, NUCLEI, MOMENTS, ISOTOPES, SPECTROMETER, PENNING TRAP, Nuclear Experiment, LASER SPECTROSCOPY, ISOLTRAP, ISOLDE, INTRUDER STATES
Abstract

Direct mass measurements of the low-spin 3/2(-) and high-spin 13/2(+) states in the neutron-deficient isotopes Po-195 and Po-197 were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the nu i(13/2) orbital in Po-195,Po-197. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from alpha-decay chains. These excitation energies complete the knowledge of the energy systematics in the region and confirm that the 13/2(+) states remain isomeric, independent of the number of valence neutrons.

Published
2017

38. Binding Energy of $^{79}\mathrm{Cu}$: Probing the Structure of the Doubly Magic $^{78}\mathrm{Ni}$ from Only One Proton Away

Author

Welker, A, Althubiti, N A S, Atanasov, D, Blaum, K, Cocolios, T E, Herfurth, F, Kreim, S, Lunney, D, Manea, V, Mougeot, M, Neidherr, D, Nowacki, F, Poves, A, Rosenbusch, M, Schweikhard, L, Wienholtz, F, Wolf, R N, Zuber, K, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA), Université de Strasbourg (UNISTRA)-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)-Université de Strasbourg (UNISTRA)

Subjects
Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; The masses of the neutron-rich copper isotopes Cu75–79 are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the Z=28, N=50 nuclide Ni78 and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic Ni78 and a new island of inversion for Z

Published
2017
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39. Spectroscopy of the long-lived excited state in the neutron-deficient nuclides $^{195,197,199}$Po by precision mass measurements

Author

Althubiti, N., Atanasov, D., Blaum, K., Cocolios, T., Goodacre, T., Farooq-Smith, G., Fedorov, D., Fedosseev, V., George, S., Herfurth, F., Heyde, K., Kreim, S., Lunney, D., Lynch, K., Manea, V., Marsh, B., Neidherr, D., Rosenbusch, M., Rossel, R., Rothe, S., Schweikhard, L., Seliverstov, M., Welker, A., Wienholtz, F., Wolf, R., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ISOLTRAP, and 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)

Subjects
FOS: Physical sciences, Nuclear Physics - Experiment, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Nuclear Experiment
Abstract

Direct mass measurements of the low-spin 3/2− and high-spin 13/2+ states in the neutron-deficient isotopes Po195 and Po197 were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the νi13/2 orbital in Po195,197. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from α-decay chains. These excitation energies complete the knowledge of the energy systematics in the region and confirm that the 13/2+ states remain isomeric, independent of the number of valence neutrons. Direct mass measurements of the low-spin $3/2^{(-)}$ and high-spin $13/2^{(+)}$ states in the neutron-deficient isotopes $^{195}$Po, $^{197}$Po, and high-spin $13/2^{(+)}$ state in $^{199}$Po were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the $\nu$i$_{13/2}$ orbital in $^{195,197}$Po. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from $\alpha$-decay chains. The new excitation energies complete the knowledge of the energy systematics in the region and confirm for the first time that the $13/2^{(+)}$ states remain isomeric, independent of the number of valence neut

Published
2017
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40. Constraining the neutron star crust via mass measurements

Author

Althubiti, N, Ascher, P, Atanasov, D, Aymard, F, Bastin, B, Blaum, K, Beck, D, Breitenfeldt, M, Cakirli, R B, Chauveau, P, Cocolios, T E, De France, G, De Oliveira, F, Delahaye, P, Eliseev, S, Eronen, T, George, S, Gulminelli, F, Herfurth, F, Herlert, A, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, MacCormick, M, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Savajols, H, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2015

41. Ge and Se beam developments for constraining the neutron star crust via mass measurements

Author

Althubiti, N, Ascher, P, Atanasov, D, Aymard, F, Bastin, B, Blaum, K, Beck, D, Breitenfeldt, M, Cakirli, R B, Chauveau, P, Cocolios, T E, De France, G, De Oliveira, F, Delahaye, P, Eliseev, S, Eronen, T, George, S, Gulminelli, F, Herfurth, F, Herlert, A, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, MacCormick, M, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Savajols, H, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2015

44. In-source laser spectroscopy of mercury isotopes

Author

Gaffney, Liam Paul, Day Goodacre, Thomas, Andreyev, Andrei, Seliverstov, Maxim, Althubiti, N, Andel, B, Antalic, S, Atanasov, D, Barzakh, A E, Blaum, K, Billowes, J, Cocolios, T E, Cubiss, J, Farooq-Smith, G, Fedorov, D V, Fedosseev, V N, Ferrer, R, Flanagan, K T, Ghys, L, Granados, C, Gottberg, A, Herfurth, F, Huyse, M, Jenkins, D G, Kisler, D, Kreim, S, Kron, T, Kudryavtsev, Yu, Lunney, D, Lynch, K M, Marsh, B A, Manea, V, Mendonca, T M, Molkanov, P L, Neidherr, D, Raabe, R, Ramos, J P, Raeder, S, Rapisarda, E, Rosenbusch, M, Rossel, R E, Rothe, S, Schweikhard, L, Sels, S, Stora, T, Tsekhanovich, I, Van Beveren, C, Van Duppen, P, Veinhard, M, Wadsworth, R, Welker, A, Wienholtz, F, Wendt, K, Wilson, G L, Witkins, S, Wolf, R, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

45. Search for $\beta$-transitions with the lowest decay energy for a determination of the neutrino mass

Author

Eliseev, S, Althubiti, N, Ascher, P, Atanasov, D, Blaum, K, Böhm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eronen, T, Filianin, P, George, S, Goncharov, M, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Novikov, Yu, Rosenbusch, M, de Roubin, A, Schweikhard, L, Wienholtz, F, Welker, A, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

46. Precision mass measurements of cesium isotopes—new entries in the ISOLTRAP chronicles

Author

Atanasov, D, primary, Beck, D, additional, Blaum, K, additional, Borgmann, Ch, additional, Cakirli, R B, additional, Eronen, T, additional, George, S, additional, Herfurth, F, additional, Herlert, A, additional, Kowalska, M, additional, Kreim, S, additional, Litvinov, Yu A, additional, Lunney, D, additional, Manea, V, additional, Neidherr, D, additional, Rosenbusch, M, additional, Schweikhard, L, additional, Wienholtz, F, additional, Wolf, R N, additional, and Zuber, K, additional

Published
2017
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47. Penning-trap mass measurements with ISOLTRAP

Author

Ascher, P, Atanasov, D, Blaum, K, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eliseev, S, Eronen, T, George, S, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya-Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, Schweikhard, L, Wienholtz, F, Welker, A, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

48. High precision mass measurements of odd-odd T=1 nuclides for the study of the Isobaric Multiplet Mass Equation

Author

MacCormick, M, Ascher, P, Atanasov, D, Blaum, K, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eliseev, S, Eronen, T, George, S, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, Zuber, K, Jokinen, A, and Moore, I D

Subjects
Detectors and Experimental Techniques
Published
2014

49. Collective degrees of freedom of neutron-rich A ≈ 100 nuclei and the first mass measurement of the short-lived nuclide 100Rb

Author

Manea, V., Atanasov, D., Beck, D., Blaum, K., Borgmann, C., Cakirli, R., Eronen, T., George, S., Herfurth, F., Herlert, A., Kowalska, M., Kreim, S., Litvinov, Y., Lunney, D., Neidherr, D., Rosenbusch, M., Schweikhard, L., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Nuclear Theory, Physics::Atomic Physics, Nuclear Experiment
Abstract

The mass surface in the A ∼ 100 region of the nuclear chart is extended by the measurement of the 98–100Rb isotopes with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN. The mass of 100Rb is determined for the first time. The studied nuclides mark the known low-Z frontier of the shape transition at N=60. To describe the shape evolution towards the krypton isotopic chain, a theoretical analysis is presented in the framework of the Hartree-Fock-Bogoliubov approach. The importance of the pairing interaction for describing the extent and strength of the region of quadrupole deformation is emphasized. A later transition to large prolate deformation or, alternatively, the predominance of oblate deformation is proposed as explanation for the different behavior of the krypton isotopes. Octupole collectivity is explored as a possible mechanism for the evolution of two-neutron separation energies around N=56.

Published
2013

50. Plumbing neutron stars to new depths with the binding energy of the rare isotope 82Zn: F. Wienholtz, K. Zuber

Author

Wolf, R.N., Beck, D., Blaum, Klaus, Bohm, C., Borgmann, Ch., Breitenfeldt, Martin, Chamel, Nicolas, Goriely, Stéphane, Herfurth, Frank, Kowalska, Magdalena, Kreim, Susanne, Lunney, David, Manea, V., Minaya Ramirez, E., Naimi, Sarah, Neidherr, D., Pearson, Michael J., Rosenbusch, Marco, Schweikhard, Lutz, Stanja, J., Wienholtz, F., and Zuber, K.

Subjects
Physique atomique et nucléaire, Astrophysique
Abstract

info:eu-repo/semantics/published

Published
2013

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