12B(n,γ)13B reaction as an alternative path to astrophysical synthesis of 13C isotope

Abstract

The total cross sections of the neutron radiative capture on 12B at astrophysical energies to the ground state of 13B, have been calculated in the energy range of 10−8 to 10 MeV within the framework of a modified potential cluster model with the classification of orbital states according to Young diagrams. Reaction rates in the temperature range of 0.01 to 10 T9, and their analytical parameterizations were obtained. The calculated rates of 12B(n,γ)13B excess the previous results obtained by other approaches by approximately to one order of magnitude. Cross sections and reaction rates of 12C(n,γ0+1+2+3)13C are calculated and compared to the n10B, n11B, n12B, and p12C reaction rates. It is proposed that the obtained rates of the 12B(n,γ)13B reaction may be suggested for the discussion of novel scenarios of stable isotope 13C synthesis when p-captures on 12C are not present.