Role of resonances in the 8li(p,g)9be capture on reaction rate of the relevant astrophysical synthesis of 9be

TL;DR

This study investigates how resonances affect the reaction rate of 8Li(p,g)9Be, crucial for astrophysical nucleosynthesis, using a modified potential cluster model and analyzing experimental cross section data.

Contribution

It introduces a detailed analysis of resonance effects on the 8Li(p,g)9Be reaction rate within a modified potential cluster framework, including an analytical parametrization.

Findings

Resonances significantly influence the reaction rate, especially at 87 keV.

Calculated reaction rates align with experimental data up to 7.0 MeV.

An analytical formula for the reaction rate was derived.

Abstract

The total cross sections of the radiative proton capture on 8Li at astrophysical energies were considered in the framework of the modified potential cluster model with forbidden states, with the classification of the orbital cluster states according to Young diagrams. The recalculation of total cross sections for the 9Be({\gamma},p0)8Li photodisintegration was used as experimental data. In whole, it is possible to obtain the available data on cross sections at energies to 7.0 MeV. Astrophysical S-factors and reaction rates at the temperature range of 0.01 to 10 T9 were calculated. It was shown that the resonances in the p8Li scattering channel considerably influence to the reaction rate and, in the first place, the first - at 87 keV. The analytical parametrization was obtained for calculated reaction rate.