The 19F(α,p)22Ne and 23Na(p,α)20Ne Reactions at Energies of Astrophysical Interest via the Trojan Horse Method

In AGB environment, Fluorine and Sodium production and destruction pathways are still not completely understood: their abundances are therefore still matter of debate.19F (only stable isotope of fluorine) abundance is strongly related to standard and extra-mixing processestype typical of the interior AGB-stars. Furthermore, the destruction channels for this element are far from being well understood. About23Na, its presence in Globular Clusters along with the well-known anticorrelation with oxygen, underline that this element has been produced in previous generations of stars: in particular, intermediate-mass AGB stars are one of the possible candidates for its production. For this reason we studied the19F(α,p)22Ne and23Na(p,α)20Ne reactions in the energy range of relevance for astrophysics via the Trojan Horse Method (THM), using the three-body reactions6Li(19F, p22Ne)d and23Na(d,pn)20Ne.