Abstract:
Neutrino-nucleus reactions on -shell and -shell nuclei are
investigated based on new shell model Hamiltonians.
We mainly discuss neutrino-induced reactions on Ni and Fe isotopes
and possible consequences on nucleosynthesis in stars.
The calculated charged current reaction cross section on Fe induced
by decay-at-rest (DAR) neutrinos is shown to be consistent with the
observation.
The Gamow-Teller strength in Ni is found to be more spread compared
to previous calculations and result in a considerably large branching ratio
for the proton knock-out channel. As a consequence of this,
the production yields of heavy elements such as Mn and Co
in population III stars are shown to be enhanced for the new Hamiltonian.
The electron capture reactions on Ni and Fe isotopes, and neutrino-induced
reactions on Fe are also discussed.
