On the 14C(alpha,gamma) reaction rate

Details On the 14C(alpha,gamma) reaction rate On the 14C(alpha,gamma) reaction rate

2009-10-02

arxiv.org/abs/0910.0498v1

Phys.Rev.C80:045805,2009

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 10 figures, 1 table. Submitted to PRC

Scientific paper

10.1103/PhysRevC.80.045805

The 14C(alpha,gamma) reaction rate at temperatures below 0.3 GK depends on the properties of two near threshold resonances in 18O, the 1- at 6.198 MeV and the 3- at 6.404 MeV. The alpha+14C Asymptotic Normalization Coefficients (ANCs) for these resonances were determined using the alpha-transfer reactions 14C(7Li,t) and 14C(6Li,d) at sub-Coulomb energies. The 14C(alpha,gamma) reaction rate at low temperatures has been evaluated. Implications of the new reaction rate on the evolution of accreting helium white dwarfs and on the nucleosynthesis of low mass stars during the asymptotic giant branch (AGB) phase are discussed.

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