The effect of 12C + 12C rate uncertainties on s-process yields

Details The effect of 12C + 12C rate uncertainties on s-process yields The effect of 12C + 12C rate uncertainties on s-process yields

2010-02-15

arxiv.org/abs/1002.2788v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Conference proceedings for the Nuclear Physics in Astrophysics IV conference, 8-12 June 2009. 4 pages, 3 figures. Accepted for

Scientific paper

The slow neutron capture process in massive stars (the weak s-process) produces most of the s-only isotopes in the mass region 60 < A < 90. The nuclear reaction rates used in simulations of this process have a profound effect on the final s-process yields. We generated 1D stellar models of a 25 solar mass star varying the 12C + 12C rate by a factor of 10 and calculated full nucleosynthesis using the post-processing code PPN. Increasing or decreasing the rate by a factor of 10 affects the convective history and nucleosynthesis, and consequently the final yields.

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