Neutron capture by 15N nucleus at astrophysical energies

TL;DR

This paper models neutron capture by 15N at astrophysical energies using a potential cluster approach, successfully explaining experimental cross-sections and predicting behavior at very low energies relevant to astrophysics.

Contribution

It introduces a potential cluster model with forbidden states and Young diagram classification to describe neutron capture on 15N, providing a new theoretical framework for this process.

Findings

Successfully explains experimental cross-sections from 25 to 370 keV.

Predicts cross-section behavior at energies around 1 eV.

Provides an analytical approximation for cross-sections at 10 keV.

Abstract

Within the potential cluster model with the forbidden states and an orbital states classification according to the Young diagrams the possibility of description of experimental data for the total cross-sections of radiative n15N-capture at energies from 25 to 370 keV was considered. It was shown that only on basis of the E1-transitions from the different states of n15N-scattering to the ground state of 16N nucleus in n15N-channel it is well succeed to explain the value of the total cross-sections in the considered energy range and to prognosticate its behavior at energy E 1 eV. These cross-sections at energies E 10 keV are approximated by the simple analytical form.