Influence of Neutrino–Nuclear Reactions on the Abundance of 74Se

The p-nuclei are supposed to be produced in different astrophysical processes, such as rapid-proton capture, photonuclear reaction, and neutrino-induced reaction. To date, their abundance cannot be reasonably explained. In the present work, the cross sections of the 74Ge (ν e , e −) 74As reaction are calculated with the theoretical and experimental B(GT) values, respectively. The abundance ratios between 74Se and 74Ge produced from the neutrino process (ν-process) are estimated based on the simple hypothesis for core-collapse supernova explosions. The results show that the upper limit of the 74Se and 74Ge abundance ratio resulting from the ν-process is about 36% of the value in the solar system.