Asymptotic normalization coefficient from the 12C(7Li,6He)13N reaction and the astrophysical 12C(p,g)13N reaction rate

TL;DR

This study measures the angular distribution of a nuclear reaction to determine the asymptotic normalization coefficient, which is then used to calculate astrophysical reaction rates relevant for stellar processes.

Contribution

The paper provides a new experimental determination of the ANC for 13N and applies it to derive astrophysical reaction rates for 12C(p,g)13N.

Findings

ANC of 13N = 1.64 ± 0.11 fm$^{-1/2}$

Derived astrophysical S-factors for 12C(p,g)13N

Calculated reaction rates at astrophysical energies

Abstract

Angular distribution of the 12C(7Li,6He)13N reaction at E(7Li) = 44.0 MeV was measured at the HI-13 tandem accelerator of Beijing, China. Asymptotic normalization coefficient (ANC) of 13N = 12C + p was derived to be 1.64 $\pm$ 0.11 fm$^{-1/2}$ through distorted wave Born approximation (DWBA) analysis. The ANC was then used to deduce the astrophysical $S(E)$ factors and reaction rates for direct capture in 12C(p,g)13N at energies of astrophysical relevance.