Indirect Measurement of 15N(p,α)12C and 18O(p,α)15N. Applications to the AGB Star Nucleosynthesis

Astronomy and Astrophysics – Astrophysics

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Nuclear Reaction Models And Methods, Hydrostatic Stellar Nucleosynthesis, Abundances, Chemical Composition

Scientific paper

The Trojan Horse Method has been recently applied to the study of reactions involved in fluorine nucleosynthesis inside AGB stars. Fluorine abundance is important since it allows to constrain mixing models from the comparison of the observed fluorine abundances with the ones predicted by models. Anyway direct measurements of the cross section do not extend down to the Gamow peak, which is the astrophysically relevant energy region. In particular the study focuses on the 15N(p,α)12C and the 18O(p,α)15N reactions which can influence fluorine yield as they are part of 19F production/destruction network.

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