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Xu ZY, Madurga M, Grzywacz R, King TT, Algora A, Andreyev AN, Benito J, Berry T, Borge MJG, Costache C, De Witte H, Fijalkowska A, Fraile LM, Fynbo HOU, Gottardo A, Halverson C, Harkness-Brennan LJ, Heideman J, Huyse M, Illana A, Janiak Ł, Judson DS, Korgul A, Kurtukian-Nieto T, Lazarus I, Lică R, Lozeva R, Marginean N, Marginean R, Mazzocchi C, Mihai C, Mihai RE, Morales AI, Page RD, Pakarinen J, Piersa-Siłkowska M, Podolyák Z, Sarriguren P, Singh M, Sotty C, Stepaniuk M, Tengblad O, Turturica A, Van Duppen P, Vedia V, Viñals S, Warr N, Yokoyama R, Yuan CX. ^{133}In: A Rosetta Stone for Decays of r-Process Nuclei. PHYSICAL REVIEW LETTERS 2023; 131:022501. [PMID: 37505957 DOI: 10.1103/physrevlett.131.022501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 04/25/2023] [Accepted: 06/14/2023] [Indexed: 07/30/2023]
Abstract
The β decays from both the ground state and a long-lived isomer of ^{133}In were studied at the ISOLDE Decay Station (IDS). With a hybrid detection system sensitive to β, γ, and neutron spectroscopy, the comparative partial half-lives (logft) have been measured for all their dominant β-decay channels for the first time, including a low-energy Gamow-Teller transition and several first-forbidden (FF) transitions. Uniquely for such a heavy neutron-rich nucleus, their β decays selectively populate only a few isolated neutron unbound states in ^{133}Sn. Precise energy and branching-ratio measurements of those resonances allow us to benchmark β-decay theories at an unprecedented level in this region of the nuclear chart. The results show good agreement with the newly developed large-scale shell model (LSSM) calculations. The experimental findings establish an archetype for the β decay of neutron-rich nuclei southeast of ^{132}Sn and will serve as a guide for future theoretical development aiming to describe accurately the key β decays in the rapid-neutron capture (r-) process.
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Affiliation(s)
- Z Y Xu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - R Grzywacz
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - T T King
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A Algora
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
- Institute of Nuclear Research (ATOMKI), P. O. Box 51, H-4001 Debrecen, Hungary
| | - A N Andreyev
- School of Physics, Engineering and Technology, University of York, North Yorkshire YO10 5DD, United Kingdom
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - J Benito
- Grupo de Física Nuclear and IPARCOS, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
- Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131, Padova, Italy
- Dipartimento di Fisica e Astronomia, Università di Padova, I-35131 Padova, Italy
| | - T Berry
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - M J G Borge
- Instituto de Estructura de la Materia, IEM-CSIC, Serrano 113 bis, E-28006 Madrid, Spain
| | - C Costache
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - H De Witte
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - A Fijalkowska
- Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - L M Fraile
- Grupo de Física Nuclear and IPARCOS, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - H O U Fynbo
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - A Gottardo
- IPN, IN2P3-CNRS, Université Paris-Sud, Université Paris Saclay, 91406 Orsay Cedex, France
| | - C Halverson
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - L J Harkness-Brennan
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - J Heideman
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - A Illana
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Ł Janiak
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
- National Centre for Nuclear Research, 05-400 Otwock, świerk, Poland
| | - D S Judson
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Korgul
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - T Kurtukian-Nieto
- CENBG, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - I Lazarus
- STFC Daresbury, Daresbury, Warrington WA4 4AD, United Kingdom
| | - R Lică
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
- ISOLDE, EP Department, CERN, CH-1211 Geneva, Switzerland
| | - R Lozeva
- Université Paris-Saclay, IJCLab, CNRS/IN2P3, F-91405 Orsay, France
| | - N Marginean
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - R Marginean
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - C Mazzocchi
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - C Mihai
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - R E Mihai
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - A I Morales
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - R D Page
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - J Pakarinen
- University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014 Jyväskylä, Finland
- Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki, Finland
| | - M Piersa-Siłkowska
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
- ISOLDE, EP Department, CERN, CH-1211 Geneva, Switzerland
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P Sarriguren
- Instituto de Estructura de la Materia, IEM-CSIC, Serrano 113 bis, E-28006 Madrid, Spain
| | - M Singh
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Ch Sotty
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - M Stepaniuk
- Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland
| | - O Tengblad
- Instituto de Estructura de la Materia, IEM-CSIC, Serrano 113 bis, E-28006 Madrid, Spain
| | - A Turturica
- Horia Hulubei National Institute for Physics and Nuclear Engineering, RO-077125 Bucharest, Romania
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - V Vedia
- Grupo de Física Nuclear and IPARCOS, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - S Viñals
- Instituto de Estructura de la Materia, IEM-CSIC, Serrano 113 bis, E-28006 Madrid, Spain
| | - N Warr
- Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
| | - R Yokoyama
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - C X Yuan
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, 519082, Guangdong, China
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Manjunatha HC, Sowmya N, Gupta PSD. Competition Between Different Decay Modes in the Isotopes of Actinide Nuclei. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY, TRANSACTIONS A: SCIENCE 2021. [DOI: 10.1007/s40995-021-01206-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Qayyum AA, Mathiasen AB, Mygind ND, Vejlstrup NG, Kastrup J. Cardiac Magnetic Resonance Imaging used for Evaluation of Adipose-Derived Stromal Cell Therapy in Patients with Chronic Ischemic Heart Disease. Cell Transplant 2019; 28:1700-1708. [PMID: 31698917 PMCID: PMC6923551 DOI: 10.1177/0963689719883592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Adipose-derived stromal cell (ASC) therapy is currently investigated as a new treatment
option for patients with ischemic heart disease (IHD). The aim of this study was to
evaluate the effect of ASC therapy in patients with chronic IHD measuring myocardial
perfusion and cardiac function using cardiac magnetic resonance imaging (CMRI). Patients
were included in MyStromalCell trial, a phase II, randomized, double-blinded,
placebo-controlled study investigated the effect of ASCs in patients with chronic IHD with
preserved left ventricular ejection fraction (LVEF). In total, 41 of 60 patients underwent
cine, late enhancement, rest and stress imaging with CMRI. There was a non-significant
difference between stress and rest values in maximal signal intensity, a measure of
myocardial perfusion, from baseline to follow-up comparing placebo with ASC group (–52.52
± 88.61 and 3.05 ± 63.17, p = 0.061, respectively). LVEF, myocardial
mass, stroke volume, left ventricle end-diastolic volume and end-systolic volume changed
non-significantly (–0.5 ± 4.7%, –3.5 ± 13.1 g, –0.7 ± 8.6 mL, 1.9 ± 25.1 mL and 2.6 ± 16.5
mL, respectively) in the placebo group and in the ASC group (0.7 ± 8.6%, 0.9 ± 10.8 g,
–0.3 ± 26.1 mL, –3.0 ± 31.5 mL and –2.7 ± 20.4 mL, respectively) from baseline to 6 months
follow-up. The amount of scar tissue was unchanged in the placebo group by 0.0 ± 1.6 g,
p = 1.0 and in the ASC group with –0.3 ± 2.3 g, p =
0.540. There was no difference between the groups. There was a non-significant trend
toward increased myocardial perfusion but no significant changes in functional parameters
or amount of scar tissue in patients treated with ASCs compared with patients allocated
into the placebo group.
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Affiliation(s)
- Abbas Ali Qayyum
- Department of Cardiology & Cardiac Catheterization Laboratory 2014, Rigshospitalet University of Copenhagen, Copenhagen, Denmark
| | - Anders Bruun Mathiasen
- Department of Cardiology & Cardiac Catheterization Laboratory 2014, Rigshospitalet University of Copenhagen, Copenhagen, Denmark
| | - Naja Dam Mygind
- Department of Cardiology & Cardiac Catheterization Laboratory 2014, Rigshospitalet University of Copenhagen, Copenhagen, Denmark
| | - Niels Groove Vejlstrup
- Department of Cardiology & Cardiac Catheterization Laboratory 2014, Rigshospitalet University of Copenhagen, Copenhagen, Denmark
| | - Jens Kastrup
- Department of Cardiology & Cardiac Catheterization Laboratory 2014, Rigshospitalet University of Copenhagen, Copenhagen, Denmark.,Cardiology Stem Cell Centre 9302, Rigshospitalet University of Copenhagen, Copenhagen, Denmark
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Kajino T, Mathews GJ. Impact of new data for neutron-rich heavy nuclei on theoretical models for r-process nucleosynthesis. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:084901. [PMID: 28357989 DOI: 10.1088/1361-6633/aa6a25] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Current models for the r process are summarized with an emphasis on the key constraints from both nuclear physics measurements and astronomical observations. In particular, we analyze the importance of nuclear physics input such as beta-decay rates; nuclear masses; neutron-capture cross sections; beta-delayed neutron emission; probability of spontaneous fission, beta- and neutron-induced fission, fission fragment mass distributions; neutrino-induced reaction cross sections, etc. We highlight the effects on models for r-process nucleosynthesis of newly measured β-decay half-lives, masses, and spectroscopy of neutron-rich nuclei near the r-process path. We overview r-process nucleosynthesis in the neutrino driven wind above the proto-neutron star in core collapse supernovae along with the possibility of magneto-hydrodynamic jets from rotating supernova explosion models. We also consider the possibility of neutron star mergers as an r-process environment. A key outcome of newly measured nuclear properties far from stability is the degree of shell quenching for neutron rich isotopes near the closed neutron shells. This leads to important constraints on the sites for r-process nucleosynthesis in which freezeout occurs on a rapid timescale.
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Affiliation(s)
- Toshitaka Kajino
- International Research Center for Big-Bang Cosmology and Element Genesis, and School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People's Republic of China. Division of Theoretical Astronomy, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan. Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-033, Japan
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5
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Wu J, Nishimura S, Lorusso G, Möller P, Ideguchi E, Regan PH, Simpson GS, Söderström PA, Walker PM, Watanabe H, Xu ZY, Baba H, Browne F, Daido R, Doornenbal P, Fang YF, Gey G, Isobe T, Lee PS, Liu JJ, Li Z, Korkulu Z, Patel Z, Phong V, Rice S, Sakurai H, Sinclair L, Sumikama T, Tanaka M, Yagi A, Ye YL, Yokoyama R, Zhang GX, Alharbi T, Aoi N, Bello Garrote FL, Benzoni G, Bruce AM, Carroll RJ, Chae KY, Dombradi Z, Estrade A, Gottardo A, Griffin CJ, Kanaoka H, Kojouharov I, Kondev FG, Kubono S, Kurz N, Kuti I, Lalkovski S, Lane GJ, Lee EJ, Lokotko T, Lotay G, Moon CB, Nishibata H, Nishizuka I, Nita CR, Odahara A, Podolyák Z, Roberts OJ, Schaffner H, Shand C, Taprogge J, Terashima S, Vajta Z, Yoshida S. 94 β-Decay Half-Lives of Neutron-Rich _{55}Cs to _{67}Ho: Experimental Feedback and Evaluation of the r-Process Rare-Earth Peak Formation. PHYSICAL REVIEW LETTERS 2017; 118:072701. [PMID: 28256889 DOI: 10.1103/physrevlett.118.072701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Indexed: 06/06/2023]
Abstract
The β-decay half-lives of 94 neutron-rich nuclei ^{144-151}Cs, ^{146-154}Ba, ^{148-156}La, ^{150-158}Ce, ^{153-160}Pr, ^{156-162}Nd, ^{159-163}Pm, ^{160-166}Sm, ^{161-168}Eu, ^{165-170}Gd, ^{166-172}Tb, ^{169-173}Dy, ^{172-175}Ho, and two isomeric states ^{174m}Er, ^{172m}Dy were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for _{58}Ce, _{59}Pr, _{60}Nd, and _{62}Sm, and N=105 for _{63}Eu, _{64}Gd, _{65}Tb, and _{66}Dy. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.
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Affiliation(s)
- J Wu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - S Nishimura
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - G Lorusso
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- National Physical Laboratory, NPL, Teddington, Middlesex TW11 0LW, United Kingdom
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P Möller
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - E Ideguchi
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - P-H Regan
- National Physical Laboratory, NPL, Teddington, Middlesex TW11 0LW, United Kingdom
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - G S Simpson
- LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France
- School of Engineering, University of the West of Scotland, Paisley, PA1 2BE, United Kingdom
- Scottish Universities Physics Alliance, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - P-A Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - P M Walker
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - H Watanabe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Z Y Xu
- Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong
- Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - H Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - F Browne
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
| | - R Daido
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - P Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Y F Fang
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - G Gey
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France
- Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France
| | - T Isobe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - P S Lee
- Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea
| | - J J Liu
- Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong
| | - Z Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z Korkulu
- Institute for Nuclear Research, Hungarian Academy of Sciences, P. O. Box 51, Debrecen, H-4001, Hungary
| | - Z Patel
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - V Phong
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Faculty of Physics, VNU Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
| | - S Rice
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - H Sakurai
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan
| | - L Sinclair
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - T Sumikama
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - M Tanaka
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - A Yagi
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - Y L Ye
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - R Yokoyama
- Center for Nuclear Study (CNS), University of Tokyo, Wako-shi, Saitama 351-0198, Japan
| | - G X Zhang
- IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - T Alharbi
- Department of Physics, College of Science in Zulfi, Almajmaah University, P.O. Box 1712, 11932, Saudi Arabia
| | - N Aoi
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | | | - G Benzoni
- INFN, Sezione di Milano, via Celoria 16, I-20133 Milano, Italy
| | - A M Bruce
- School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
| | - R J Carroll
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - K Y Chae
- Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Z Dombradi
- Institute for Nuclear Research, Hungarian Academy of Sciences, P. O. Box 51, Debrecen, H-4001, Hungary
| | - A Estrade
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - A Gottardo
- Dipartimento di Fisica dellUniversit' degli Studi di Padova, I-35131 Padova, Italy
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - C J Griffin
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - H Kanaoka
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - F G Kondev
- Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Kubono
- RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - I Kuti
- Institute for Nuclear Research, Hungarian Academy of Sciences, P. O. Box 51, Debrecen, H-4001, Hungary
| | - S Lalkovski
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - G J Lane
- Department of Nuclear Physics, R.S.P.E., Australian National University, Canberra, A.C.T. 0200, Australia
| | - E J Lee
- Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - T Lokotko
- Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong
| | - G Lotay
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - C-B Moon
- Hoseo University, Asan, Chungnam 336-795, Korea
| | - H Nishibata
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - I Nishizuka
- Department of Physics, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan
| | - C R Nita
- School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
- Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest, Romania
| | - A Odahara
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - O J Roberts
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - C Shand
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - J Taprogge
- Departamento de Fsica Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
| | - S Terashima
- IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Z Vajta
- Institute for Nuclear Research, Hungarian Academy of Sciences, P. O. Box 51, Debrecen, H-4001, Hungary
| | - S Yoshida
- Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan
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Wu J, Nishimura S, Lorusso G, Xu Z, Ideguchi E, Simpson G, Baba H, Browne F, Daido R, Doornebal P, Fang Y, Isobe T, Li Z, Patel Z, Rice S, Sinclair L, Söderström PA, Sumikama T, Watanabe H, Yagi A, Yokoyama R, Aoi N, Garrote FB, Benzoni G, Gey G, Gottardo A, Nishibata H, Odahara A, Sakurai H, Tanaka M, Taprogge J, Yamamoto T. β-decay half-lives of neutron-rich nuclei around158Nd, relevant to the formation of the A≈165 rare-earth element peak. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201610908003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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7
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An analysis of β-delayed neutron emission of even–even neutron-rich nuclei with proton-neutron QRPA. PROGRESS IN NUCLEAR ENERGY 2015. [DOI: 10.1016/j.pnucene.2014.07.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Morales AI, Benlliure J, Kurtukián-Nieto T, Schmidt KH, Verma S, Regan PH, Podolyák Z, Górska M, Pietri S, Kumar R, Casarejos E, Al-Dahan N, Algora A, Alkhomashi N, Álvarez-Pol H, Benzoni G, Blazhev A, Boutachkov P, Bruce AM, Cáceres LS, Cullen IJ, Denis Bacelar AM, Doornenbal P, Estévez-Aguado ME, Farrelly G, Fujita Y, Garnsworthy AB, Gelletly W, Gerl J, Grebosz J, Hoischen R, Kojouharov I, Kurz N, Lalkovski S, Liu Z, Mihai C, Molina F, Mücher D, Rubio B, Shaffner H, Steer SJ, Tamii A, Tashenov S, Valiente-Dobón JJ, Walker PM, Wollersheim HJ, Woods PJ. Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei. PHYSICAL REVIEW LETTERS 2014; 113:022702. [PMID: 25062171 DOI: 10.1103/physrevlett.113.022702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 06/03/2023]
Abstract
This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic (208)Pb. The lifetimes of the 126-neutron shell isotone (204)Pt and the neighboring (200-202)Ir, (203)Pt, (204)Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N<126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during β decay back to stability.
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Affiliation(s)
- A I Morales
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J Benlliure
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - T Kurtukián-Nieto
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - K-H Schmidt
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - S Verma
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - P H Regan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom and National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom
| | - Z Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - M Górska
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - S Pietri
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - R Kumar
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany and IFAC, New Delhi, India
| | - E Casarejos
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - N Al-Dahan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Algora
- IFIC, CSIC-Universidad de Valencia, E-46071 Valencia, Spain and Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4001, Hungary
| | - N Alkhomashi
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - H Álvarez-Pol
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - G Benzoni
- INFN, Università degli Studi di Milano, I-20133 Milano, Italy
| | - A Blazhev
- IKP, University of Cologne, D-50937 Cologne, Germany
| | - P Boutachkov
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - A M Bruce
- School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - L S Cáceres
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - I J Cullen
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A M Denis Bacelar
- School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - P Doornenbal
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - M E Estévez-Aguado
- Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - G Farrelly
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Y Fujita
- Department of Physics, Osaka University, 560-0043 Osaka, Japan
| | - A B Garnsworthy
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - W Gelletly
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - J Gerl
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - J Grebosz
- The Henryk Niewodniczànski Institute of Nuclear Physics, PL-31-342 Kraków, Poland
| | - R Hoischen
- Department of Physics, Lund University, S-22100 Lund, Sweden
| | - I Kojouharov
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - N Kurz
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - S Lalkovski
- School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - Z Liu
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - C Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest-Magurele, Romania
| | - F Molina
- IFIC, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - D Mücher
- IKP, University of Cologne, D-50937 Cologne, Germany
| | - B Rubio
- IFIC, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - H Shaffner
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - S J Steer
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Tamii
- Research Center for Nuclear Physics (RCNP), Osaka University, 567-0047 Osaka, Japan
| | - S Tashenov
- GSI, Planckstrasse 1, D-64291 Darmstadt, Germany
| | | | - P M Walker
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | | | - P J Woods
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
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10
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Madurga M, Surman R, Borzov IN, Grzywacz R, Rykaczewski KP, Gross CJ, Miller D, Stracener DW, Batchelder JC, Brewer NT, Cartegni L, Hamilton JH, Hwang JK, Liu SH, Ilyushkin SV, Jost C, Karny M, Korgul A, Królas W, Kuźniak A, Mazzocchi C, Mendez AJ, Miernik K, Padgett SW, Paulauskas SV, Ramayya AV, Winger JA, Wolińska-Cichocka M, Zganjar EF. New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation. PHYSICAL REVIEW LETTERS 2012; 109:112501. [PMID: 23005622 DOI: 10.1103/physrevlett.109.112501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 05/10/2012] [Indexed: 06/01/2023]
Abstract
The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-lives were found to be very different from the predictions of the global model used in astrophysical simulations. A new calculation was developed using the density functional model, which properly reproduced the new experimental values. The robustness of the new model in the (78)Ni region allowed us to extrapolate data for more neutron-rich isotopes. The revised analysis of the rapid neutron capture process in low entropy environments with our new set of measured and calculated half-lives shows a significant redistribution of predicted isobaric abundances strengthening the yield of A>140 nuclei.
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Affiliation(s)
- M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
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Savin DW, Brickhouse NS, Cowan JJ, Drake RP, Federman SR, Ferland GJ, Frank A, Gudipati MS, Haxton WC, Herbst E, Profumo S, Salama F, Ziurys LM, Zweibel EG. The impact of recent advances in laboratory astrophysics on our understanding of the cosmos. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2012; 75:036901. [PMID: 22790424 DOI: 10.1088/0034-4885/75/3/036901] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
An emerging theme in modern astrophysics is the connection between astronomical observations and the underlying physical phenomena that drive our cosmos. Both the mechanisms responsible for the observed astrophysical phenomena and the tools used to probe such phenomena-the radiation and particle spectra we observe-have their roots in atomic, molecular, condensed matter, plasma, nuclear and particle physics. Chemistry is implicitly included in both molecular and condensed matter physics. This connection is the theme of the present report, which provides a broad, though non-exhaustive, overview of progress in our understanding of the cosmos resulting from recent theoretical and experimental advances in what is commonly called laboratory astrophysics. This work, carried out by a diverse community of laboratory astrophysicists, is increasingly important as astrophysics transitions into an era of precise measurement and high fidelity modeling.
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Affiliation(s)
- D W Savin
- Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA
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Zhao PW, Li LL, Li ZP, Niu ZM, Ring P, Yao JM, Zhou SG, Meng J. Covariant density functional theory and applications in nuclear physics and r-process. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123802001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Sumikama T, Yoshinaga K, Watanabe H, Nishimura S, Miyashita Y, Yamaguchi K, Sugimoto K, Chiba J, Li Z, Baba H, Berryman JS, Blasi N, Bracco A, Camera F, Doornenbal P, Go S, Hashimoto T, Hayakawa S, Hinke C, Ideguchi E, Isobe T, Ito Y, Jenkins DG, Kawada Y, Kobayashi N, Kondo Y, Krücken R, Kubono S, Lorusso G, Nakano T, Kurata-Nishimura M, Odahara A, Ong HJ, Ota S, Podolyák Z, Sakurai H, Scheit H, Steiger K, Steppenbeck D, Takano S, Takashima A, Tajiri K, Teranishi T, Wakabayashi Y, Walker PM, Wieland O, Yamaguchi H. Structural evolution in the neutron-rich nuclei ¹⁰⁶Zr and ¹⁰⁸Zr. PHYSICAL REVIEW LETTERS 2011; 106:202501. [PMID: 21668223 DOI: 10.1103/physrevlett.106.202501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Indexed: 05/30/2023]
Abstract
The low-lying states in ¹⁰⁶Zr and ¹⁰⁸Zr have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620 ± 150 ns has been identified in ¹⁰⁸Zr. For the sequence of even-even Zr isotopes, the excitation energies of the first 2⁺ states reach a minimum at N = 64 and gradually increase as the neutron number increases up to N = 68, suggesting a deformed subshell closure at N = 64. The deformed ground state of ¹⁰⁸Zr indicates that a spherical subshell gap predicted at N = 70 is not large enough to change the ground state of ¹⁰⁸Zr to the spherical shape. The possibility of a tetrahedral shape isomer in ¹⁰⁸Zr is also discussed.
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Affiliation(s)
- T Sumikama
- Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
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