Light radioactive nuclei capture reactions with phenomenological potential models

Abstract

Light radioactive nuclei play an important role in many astrophysical environments. Due to very low cross sections of some neutron and proton capture reactions by these radioactive nuclei at energies of astrophysical interest, direct laboratory measurements are very difficult. For radioactive nuclei such as 8Li and 8B, the direct measurement of neutron capture reactions is impossible. Indirect methods have been applied to overcome these difficulties. In this work we will report on the results and discussion of phenomenological potential models used to determine some proton and neutron capture reactions. As a test we show the results for the 16O(p,g)17F_gs(5/2+) and 16O(p,g)17F_ex(1/2+) capture reactions.We also computed the nucleosynthesis cross sections for the 7Li(n,g)8Li, 8Li(n,g)9Li and 8B(p,g)9C capture reactions.

arXiv commentInvited talk at Nuclear Physics Meeting in Brazil (2009). To be published at AIP conference proceedings

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• New Results for the p7Be-->8Bgamma Astrophysical S-factor from 10 keV to 5 MeV and Reactions Rate from 0.01 to 10 T9
• Influence of resonances on the 11B(n,gamma)12B capture reaction rate. Capture to the ground state of 12B
• Influence of low-lying resonances on reaction rates for n10B capture
• 12B(n,gamma)13B reaction as alternative path to astrophysical synthesis of 13C isotope
• The comparative role of 7Li(n,γ) reaction in primordial nucleosynthesis