NEW STELLAR REACTION RATE FOR ~(12)C(α, γ)~(16)O

摘要

The ~(12)C(α, γ)~(16)O reaction rate has been reevaluated using recently published cross section estimates. The results suggest that the temperature dependence of the reaction rate as given by Caughlan & Fowler should be revised, even though the absolute cross section of ~(12)C(α, γ)~(16)O still needs a better determination at low energies. Values for the stellar reaction rate of ~(12)C(α, γ)~(16)O have been calculated for a recommended cross section as well as for the experimental upper and lower limits of the cross section. In addition, analytic expressions for these reaction rates are given for 0.03 ≤ T_9 ≤ 2.