Abstract
The reaction rates of the s-process neutron producing 22Ne(α,n)25Mg reaction and its competing 22Ne(α, γ)26Mg reaction are needed to accurately predict nucleosynthesis in massive stars and Asymptotic Giant Branch stars. Here, we present a re-evaluation of the reaction rates by incorporating recent data and by using a Monte Carlo uncertainty propagation method. The effect of those results on nucleosynthesis in massive stars is studied. We show that our new rates lead to similar final abundances, but with significantly reduced uncertainties in comparison to literature rates.
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