ASTROPHYSICAL S(0)-FACTORS FOR THE $^{3}{\rm He}(\alpha, \gamma)^{7}{\rm Be}$, $^{3}{\rm H}(\alpha, \gamma)^{7}{\rm Li}$ and $^{7}{\rm Be}(p, \gamma)^{8}{\rm B}$ DIRECT CAPTURE PROCESSES IN A POTENTIAL MODEL

TL;DR

This paper estimates astrophysical S-factors at zero energy for key nuclear capture reactions relevant to astrophysics using a potential cluster model, providing new calculated values based on adjusted potential models.

Contribution

It introduces a method to calculate S(0)-factors using two different potential models aligned with empirical data, offering updated values for these reactions.

Findings

New S(0)-factor values for the reactions are obtained.

Two potential models yield consistent results aligned with empirical data.

The approach enhances understanding of nuclear processes in astrophysical environments.

Abstract

Astrophysical S-factors at zero energy for the direct nuclear capture reactions $^{3}{\rm He}(\alpha, \gamma)^{7}{\rm Be}$, $^{3}{\rm H}(\alpha, \gamma)^{7}{\rm Li}$ and $^{7}{\rm Be}(p, \gamma)^{8}{\rm B}$ are estimated within the framework of two-body potential cluster model on the basis of extranuclear capture approximation of D. Baye and E. Brainis. The values of S(0)-factors have been calculated using two different potential models for each process, which were adjusted to the binding energies and empirical values of the asymptotical normalization coefficients from the literature. New values of S(0)-factors have been obtained.