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

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Published under licence by IOP Publishing Ltd
, , Citation M E Bennett et al 2010 J. Phys.: Conf. Ser. 202 012023 DOI 10.1088/1742-6596/202/1/012023

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Author affiliations

1 Astrophysics Group, Keele University, ST5 5BG, UK

2 IPMU, University of Tokyo, Kashiwa, Chiba 277-8582, Japan

3 Joint Institute for Nuclear Astrophysics, University of Notre Dame, IN, 46556, USA

4 TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada, V6T 2A3

5 Theoretical Astrophysics Group (T-6), LANL, Los Alamos, NM, 87544, USA

6 Computation, Physics and Methods (CCS2), LANL, Los Alamos, NM, 87544, USA

7 Department of Physics & Astronomy, Victoria, BC, V8W 3P6,Canada

8 School of Earth and Space Exploration, University of Arizona, Tempe, AZ 85287, USA

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1742-6596/202/1/012023

Abstract

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 25M⊙ 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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10.1088/1742-6596/202/1/012023