期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.192501
关键词
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资金
- Rare Isotope Science Project
- Ministry of Education, Science, and Technology (MEST)
- National Research Foundation (NRF) of Korea
- KAKENHI [25247045, 2301752, 25800130]
- RIKEN Foreign Research Program
- Spanish Ministerio de Ciencia e Innovacion [FPA2009-13377-C02, FPA2011-29854-C04]
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357]
- NASA [NNX10AH78G]
- Hungarian Scientific Research Fund OTKA [K100835]
- National Research Foundation of Korea [2013M7A1A1075764, 2009-0093817] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Science and Technology Facilities Council [ST/J000051/1, ST/L005743/1] Funding Source: researchfish
- STFC [ST/L005743/1, ST/J000051/1] Funding Source: UKRI
- NASA [NNX10AH78G, 133000] Funding Source: Federal RePORTER
- Grants-in-Aid for Scientific Research [25800130, 26800117, 25247045, 24105004, 13J01876, 26105517] Funding Source: KAKEN
The beta-decay half-lives of 110 neutron-rich isotopes of the elements from 37 Rb to 50 Sn were measured at the Radioactive Isotope Beam Factory. The 40 new half-lives follow robust systematics and highlight the persistence of shell effects. The new data have direct implications for r-process calculations and reinforce the notion that the second (A approximate to 130) and the rare-earth-element (A approximate to 160) abundance peaks may result from the freeze-out of an (n, gamma) reversible arrow (gamma, n) equilibrium. In such an equilibrium, the new half-lives are important factors determining the abundance of rare-earth elements, and allow for a more reliable discussion of the r process universality. It is anticipated that universality may not extend to the elements Sn, Sb, I, and Cs, making the detection of these elements in metal-poor stars of the utmost importance to determine the exact conditions of individual r-process events.
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