Abstract
We examine nucleosynthesis inside an accretion disk with accretion rates 0.01 - 1M s - 1 associated with gamma-ray bursts. The black hole mass is fixed to be 3M. The chemical composition of accreting gas far from the black hole is taken to be that of an oxygen-rich layer of a massive star before the collapse. The disk consists of five layers characterized by dominant elements: 1 6 O, 2 8 Si, 5 4 Fe (and 5 6 Ni), 4 He, and nucleons. As the accretion rate increases, the individual layers shift outwards with keeping the overall profiles of composition. A similar situation may be realized in an accretion disk around an intermediate mass black hole produced in a collapsing Population III supermassive star.
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