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Title: β-decay of neutron-rich Z∼60 nuclei and the origin of rare earth elements

A large fraction of the rare-earth elements observed in the solar system is produced in the astrophysical rapid neutron capture process (r-process). However, current stellar models cannot completely explain the relative abundance of these elements partially because of nuclear physics uncertainties. To address this problem, a β-decay spectroscopy experiment was performed at RI Beam Factory (RIBF) at RIKEN, aimed at studying a wide range of very neutron-rich nuclei with Z∼60 that are progenitors of the rare-earth elements with mass number A∼460. The experiment provides a test of nuclear models as well as experimental inputs for r-process calculations. This contribution presents the experimental setup and some preliminary results of the experiment.
Authors:
 [1] ; ; ; ; ; ; ;  [2] ;  [3] ;  [4] ; ; ; ; ; ;  [5] ; ; ;  [6] ; more »; « less
  1. RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan and School of Physics and State key Laboratory of Nuclear Physics and Technology, Peking University (China)
  2. RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198 (Japan)
  3. Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo (Japan)
  4. School of Computing Engineering and Mathematics, University of Brighton (United Kingdom)
  5. Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka (Japan)
  6. Research Center for Nuclear Physics, Osaka University (Japan)
Publication Date:
OSTI Identifier:
22280491
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1594; Journal Issue: 1; Conference: OMEG12: 12. international symposium on origin of matter and evolution of galaxies, Tsukuba (Japan), 18-21 Nov 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASTROPHYSICS; BETA DECAY; BETA SPECTROSCOPY; CAPTURE; ELEMENT ABUNDANCE; GAMMA SPECTROSCOPY; INTERMEDIATE MASS NUCLEI; JAPANESE ORGANIZATIONS; NEUTRON REACTIONS; NEUTRON-RICH ISOTOPES; NUCLEAR MODELS; R PROCESS; RADIOACTIVE ION BEAMS; RARE EARTHS; SOLAR SYSTEM