Abstract
Neutrino-induced reactions on are investigated by shell-model calculations with new shell-model Hamiltonians, which can describe well the structure of -shell and -shell nuclei. The distribution of the spin-dipole strengths in , which give major contributions to the reaction cross sections, is studied with the new Hamiltonians. Muon-capture reaction rates on are also studied to discuss the quenching of the axial-vector coupling in the nuclear medium. Charged-current and neutral-current reaction cross sections are evaluated in various particle and emission channels as well as the total ones at neutrino energies up to MeV. Branching ratios for the various channels are obtained by the Hauser-Feshbach statistical model calculations, and partial cross sections for single- and multiparticle emission channels are evaluated. The cross sections updated are compared with previous continuum random phase approximation calculations. Effects of multiparticle emission channels on nucleosynthesis in core-collapse supernova explosions are investigated. Inclusion of emission channels is found to lead to an enhancement of production yields of and through and reactions, respectively.
6 More- Received 5 July 2018
- Revised 4 September 2018
DOI:https://doi.org/10.1103/PhysRevC.98.034613
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