Nucleosynthesis in Type II Supernovae

Presupernova evolution and explosive nucleosynthesis in massive stars for main-sequence masses from 13 M ⊙ to 70 M ⊙ are calculated. We examine the dependence of the supernova yields on the stellar mass, 12 C( α, γ ) 16 O rate, and explosion energy. The supernova yields integrated over the initial mass function are compared with the solar abundances.