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

Journal Article · Fri May 02 00:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4874099· OSTI ID:22280491

Wu, J. ^[1]; Nishimura, S.; Lorusso, G.; Baba, H.; Doornenbal, P.; Isobe, T.; Söderström, P. A.; Sakurai, H. ^[2]; Xu, Z. Y. ^[3]; Browne, F. ^[4]; Daido, R.; Fang, Y. F.; Yagi, A.; Nishibata, H.; Odahara, A.; Yamamoto, T. ^[5]; Ideguchi, E.; Aoi, N.; Tanaka, M. ^[6]; others, and

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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)

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.

• OSTI ID: 22280491
• Journal Information: AIP Conference Proceedings, Vol. 1594, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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