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Abstract: The 14Calpha,gamma reaction rate at temperatures below 0.3 GK depends onthe properties of two near threshold resonances in 18O, the 1- at 6.198 MeV andthe 3- at 6.404 MeV. The alpha+14C Asymptotic Normalization Coefficients ANCsfor these resonances were determined using the alpha-transfer reactions14C7Li,t and 14C6Li,d at sub-Coulomb energies. The 14Calpha,gammareaction rate at low temperatures has been evaluated. Implications of the newreaction rate on the evolution of accreting helium white dwarfs and on thenucleosynthesis of low mass stars during the asymptotic giant branch AGBphase are discussed.

Autor: E.D. Johnson, G.V. Rogachev, J. Mitchell, L. Miller, K.W. Kemper

Fuente: https://arxiv.org/

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