Abstract
The two main neutron producing reactions in stellar He burning, 13 C(α, n)16 O and 22 Ne(α, n)25 Mg , along with the 22 Ne(α, γ)26Mg competing channel, have been intensively studied recently, leading to new rate determinations. This work examines the impact of those new rates on the neutron production that is predicted to accompany central He burning in M ≥ 20M ⊙ stars with metallicity Z = 0.02. When the new rates are used, the corresponding 20M ⊙ star time integrated neutron flux is enhanced by about 30% with respect to the value obtained with the rates of Caughlan and Fowler (1988). The situation is qualitatively similar in more massive stars.
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