The 7Li(n,gamma)8Li Radiative Capture at Astrophysical Energies

TL;DR

This paper models the radiative capture process of neutrons by lithium-7 at astrophysical energies, using cluster potentials to describe resonance behaviors and cross sections relevant to stellar nucleosynthesis.

Contribution

It introduces a potential cluster model with forbidden states to accurately describe the resonance and cross sections of the 7Li(n,g)8Li reaction at low energies.

Findings

Successfully modeled total cross sections from 5 meV to 1 MeV.

Reproduced resonance at 0.25 MeV in the cross section.

Validated the potential cluster approach for astrophysical reactions.

Abstract

The variants of intercluster interaction potentials were constructed for description of the resonance nature of some phase shifts of the n7Li elastic scattering at low energies and the P2 ground state of 8Li in the n7Li cluster channel. The possibility of describing the total cross sections of 7Li(n,g)8Li in the region from 5 meV (5 10-3 eV) to 1 MeV including resonance at 0.25 MeV was shown with the potentials obtained in the potential cluster model taking into account forbidden states.