Universality of the p-process

The solar abundances provide a concept of universality that the abundance ratios of the p-nucleus to the s-nucleus with the same atomic number are almost constant with the wide region for materials produced by individual stellar nucleosynthesis episode. We study this universality using γ -process calculations with core-collapse supernova explosions under various conditions. The calculated results show that the γ -process under the various conditions can occur but the ratios are almost constant with the wide region independent of the conditions. The shift of γ -process layers, weak s-process and the beta; -decay after the γ -process contribute to the manifestation of the universality.