Abstract
The triple-alpha (3α) reaction, 4He+4He+4He→12C+γ, which plays a significant role in the stellar evolution scenarios, is studied in terms of a three-alpha (3-α) model. The reaction rate of the process is calculated via an inverse process, 3-α photodisintegration of a 12C nucleus. Both of 3-α bound and-continuum states are calculated by a Faddeev method with accommodating the long range Coulomb interaction. With being adjusted to the empirical E2-strength for 12C(02+)→12C(21+) transition, results of the 3α reaction rate 〈ααα〉 at higher temperature (T > 108 K), where the reaction proceeds mainly through the 8Be and 12C(02+) resonant states, almost agree with those of the Nuclear Astrophysics Compilation of Reaction Rates (NACRE). On the other hand, calculated values of 〈ααα〉 are about 103 times larger than the NACRE rate at a low temperature (T = 107 K), which means our results are remarkably smaller than recent CDCC results.
Published Version
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