Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006phrvl..97s2701j&link_type=abstract
Physical Review Letters, vol. 97, Issue 19, id. 192701
Astronomy and Astrophysics
Astrophysics
9
Transfer Reactions, Transfer Reactions, Hydrostatic Stellar Nucleosynthesis, 6<=A<=19
Scientific paper
The reaction C13(α,n) is considered to be the main source of neutrons for the s process in asymptotic giant branch stars. At low energies, the cross section is dominated by the 1/2+ 6.356 MeV subthreshold resonance in O17 whose contribution at stellar temperatures is uncertain by a factor of 10. In this work, we performed the most precise determination of the low-energy astrophysical S factor using the indirect asymptotic normalization (ANC) technique. The α-particle ANC for the subthreshold state has been measured using the sub-Coulomb α-transfer reaction (Li6,d). Using the determined ANC, we calculated S(0), which turns out to be an order of magnitude smaller than in the nuclear astrophysics compilation of reaction rates.
Baby Lagy T.
Brown Shanique
Cluff W. T.
Crisp A. M.
Diffenderfer Eric
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