The proton capture reactions on21Na and22Na under hydrogen burning conditions

Physics

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25.40, 97.10

Scientific paper

We have updated and recalculated the21Na( p, γ)22Mg and22Na( p, γ)23Mg reaction rates for temperatures 107 109 K relevant for explosive hydrogen burning in stellar environment. We find the21Na( p, γ)22Mg rate lower than recently suggested. Considering various uncertainties in spin and parity assignments of the low energy22Na+ p resonances we present upper and lower limits for the22Na( p, γ)23Mg reaction rate which, however, allows for a meaningful discussion of the consequences of the new rates on the Ne - Na cycle under various stellar conditions.

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