Gamow-Teller Strengths in Ni Isotopes and Nuclear Weak Processes(YKIS2011 papers, Frontier Issues in Physics of Exotic Nuclei)

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概要

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• Gamow-Teller strengths in Ni isotopes are evaluated by using a new shell model Hamiltonian, GXPF1J, and applied to nuclear weak processes in stars. The calculated strengths are found to reproduce recent experimental data fairly well. Neutral current reactions on ^<56>Ni induced by supernova neutrinos are studied. The cross section for proton emission channel is found to be increased comapared to previous calculations. The enhancement of the cross section is pointed out to lead to the enhancement of the production amount of ^<55>Mn and ^<59>Co in population III stars. The electron capture reactions on Ni isotopes at stellar environments are investigated. Considerable improvements of the evaluation of the capture rates are obtained by using GXPF1J compared to previous calculations.

• 2012-10-22

著者

• KAJINO Toshitaka

  National Astronomical Observatory

• Otsuka Takaharu

  Department Of Physics And Center For Nuclear Studies University Of Tokyo:riken Hirosawa

• Honma Michio

  Center For Mathematical Sciences The University Of Aizu

• Suzuki Toshio

  Department Of Agronomy Faculty Of Agriculture Tohoku University

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