Abundance of 19F exceeds by far the predicted one. This problem represents one of the unanswered questions of stellar modelling. A source of large uncertainties at relevant energies are the 19F(ro, alfa)16O and 19F(alfa, ro)22Ne reactions. Although the lowest energy point from direct experiments are at about 660 keV, the astrophysical relevant energy region is only known by R-Matrix calculations. In this work we apply the Trojan Horse Method (THM) to the appropriate quasi-free three-body reactions. The THM application allowed us to study the sub-Coulomb energy region and to get the corresponding S(E) factor values, thus allowing for a detailed evaluation of its astrophysical impact.
Fluorine Destruction in Stellar Environments
Pizzone, R. G.;D’Agata, G.;Guardo, G. L.;Hayakawa, S.;Lamia, L.;Lattuada, M.;Rapisarda, G. G.;Romano, S.;Sergi, M. L.;
2020-01-01
Abstract
Abundance of 19F exceeds by far the predicted one. This problem represents one of the unanswered questions of stellar modelling. A source of large uncertainties at relevant energies are the 19F(ro, alfa)16O and 19F(alfa, ro)22Ne reactions. Although the lowest energy point from direct experiments are at about 660 keV, the astrophysical relevant energy region is only known by R-Matrix calculations. In this work we apply the Trojan Horse Method (THM) to the appropriate quasi-free three-body reactions. The THM application allowed us to study the sub-Coulomb energy region and to get the corresponding S(E) factor values, thus allowing for a detailed evaluation of its astrophysical impact.| File | Dimensione | Formato | |
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Fluorine Destruction in Stellar Environments.pdf
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