期刊
PHYSICAL REVIEW C
卷 83, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.83.044619
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20105004]
- JPSJ
- [22540290]
- [20244035]
- Grants-in-Aid for Scientific Research [20244035, 20105004, 22540290] Funding Source: KAKEN
Electron capture rates in Ni isotopes are studied in stellar environments, that is, at high densities and high temperatures during the core-collapse and postbounce explosive nucleosynthesis in supernovae. Reaction rates in Ni-58 and Ni-60, as well as in Ni-56, Ni-62, and Ni-64, are evaluated by shell-model calculations with the use of a new shell-model Hamiltonian in the fp shell, GXPF1J. While the previous shell-model calculations failed to reproduce the measured peaks of Gamow-Teller strength in Ni-58 and Ni-60, the present new Hamiltonian is found to reproduce them very well, as well as the capture rates obtained from the observed strengths. Strengths and energies of the Gamow-Teller transitions in Ni-56, Ni-62, and Ni-64 are also found to be consistent with the observations.
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