EPJ Web of Conferences (Jan 2018)

The 19F(α, p)22Ne and 23Na(p,α)20Ne reaction in AGB nucleosynthesis via THM

  • D’Agata G.,
  • Pizzone R. G.,
  • La Cognata M.,
  • Indelicato I.,
  • Spitaleri C.,
  • Burjan V.,
  • Cherubini S.,
  • Di Pietro A.,
  • Guardo G. L.,
  • Gulino M.,
  • La Commara M.,
  • Lamia L.,
  • Lattuada M.,
  • Mazzocco M.,
  • Mrazek J.,
  • Milin M.,
  • Palmerini S.,
  • Parascandolo C.,
  • Pierroutsakou D.,
  • Rapisarda G.G.,
  • Romano S.,
  • Sergi M.L.,
  • Soić N.,
  • Spartá R.,
  • Trippella O.,
  • Tumino A.

DOI
https://doi.org/10.1051/epjconf/2018184h02003
Journal volume & issue
Vol. 184
p. 02003

Abstract

Read online

In AGB environment, fluorine and sodium abundances are still matter of debate. About 19F (only stable isotope of fluorine), its abundance in the universe is strictly related to standard and extra-mixing processes taking place inside AGB-stars, that are considered to be the most important sites for its production. Nevertheless the way in which it is destroyed is far from being well understood. On the other hand, 23Na presence in Globular Clusters, along with is well-known anticorrelation with oxygen has made clear that this element must be produced in previous generations stars, and intermediatemass AGB stars are one of the possible candidates for its production. For this reason we studied the 19F(α,p)22Ne and 23Na(p,α)20Ne reactions in the energy range of relevance for astrophysics via the Trojan Horse Method (THM), using the three-body reactions 6Li(19F, p22Ne)d and 23Na(d, pn)20Ne.