@article{oai:kumadai.repo.nii.ac.jp:00024561, author = {Ono, Masaomi and Hashimoto, Masa-aki and Kikuchi, Yukihiro and Fujimoto, Shin-ichiro and Arai, Kenzo and 荒井, 賢三}, issue = {2}, journal = {Physics Reports of Kumamoto University}, month = {}, note = {We investigate synthesis of heavy elements in a helium star of 32 M_sun. Numerical calculations of nucleosynthesis have been performed during the stage of hydrostatic stellar evolution. A collapsar model is adopted whose jets are driven by magneto-hydrodynamical effects of differentially rotating core. Nucleosynthesis inside the jets is followed along the trajectories of tracer particles. Both results of hydrostatic and explosive nucleosyntheses are combined to be the yields after supernoca explosion. Comparing with the solar system abundances, we find appreciable overproduction for nuclei of the mass number 60