期刊
PHYSICAL REVIEW C
卷 87, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.87.025803
关键词
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资金
- Helmholtz International Center for FAIR
- Helmholtz Association through the Nuclear Astrophysics Virtual Institute [VH-VI-417]
- ExtreMe Matter Institute (EMMI)
- Deutsche Forschungsgemeinschaft [SFB 634]
- National Natural Science Foundation of China [11165006, 11105079]
- IN2P3-GSI collaboration agreement [10-63]
We have performed large-scale shell-model calculations of the half-lives and neutron-branching probabilities of the r-process waiting-point nuclei at the magic neutron numbers N = 50, 82, and 126. The calculations include contributions from allowed Gamow-Teller and first-forbidden transitions. We find good agreement with the measured half-lives for the N = 50 nuclei with charge numbers Z = 28-32 and for the N = 82 nuclei Ag-129 and Cd-130. The contribution of forbidden transitions reduce the half-lives of the N = 126 waiting-point nuclei significantly, while they have only a small effect on the half-lives of the N = 50 and 82 r-process nuclei. DOI: 10.1103/PhysRevC.87.025803
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