Astrophysical Reaction Rate for the Neutron-Generator Reaction <?format ?>in Asymptotic Giant Branch Stars
ED Johnson, GV Rogachev, AM Mukhamedzhanov… - Physical review …, 2006 - APS
Physical review letters, 2006•APS
The reaction C 13 (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 O 17 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 …
asymptotic giant branch stars. At low energies, the cross section is dominated by the 1/2+
6.356 MeV subthreshold resonance in O 17 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 …
The reaction is considered to be the main source of neutrons for the process in asymptotic giant branch stars. At low energies, the cross section is dominated by the 6.356 MeV subthreshold resonance in 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 factor using the indirect asymptotic normalization (ANC) technique. The -particle ANC for the subthreshold state has been measured using the sub-Coulomb -transfer reaction . Using the determined ANC, we calculated , which turns out to be an order of magnitude smaller than in the nuclear astrophysics compilation of reaction rates.
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