Study of radiative proton capture by the 7Be nucleus with the use of ab initio approaches

TL;DR

This paper employs ab initio methods to theoretically analyze the 7Be(p,gamma)8B reaction, calculating the astrophysical S-factor and nuclear characteristics with high accuracy.

Contribution

It introduces a combined approach using No-Core Shell Model, Cluster Channels Orthogonal Functions, and R-matrix theory for reliable reaction mechanism analysis.

Findings

High accuracy results for the astrophysical S-factor.

Evaluation of dominant reaction mechanisms.

Methodology allows for reliability assessment of computed data.

Abstract

A theoretical study of the 7Be(p,gamma)8B reaction in the astrophysical energy range with the use of ab initio methods is presented. The used approaches are No-Core Shell Model and Cluster Channels Orthogonal Functions Method. The scheme also contains elements of R-matrix theory and procedures for extrapolating various data obtained in ab initio computations. The developed approach as a whole allows one not only to calculate the astrophysical S-factor and all nuclear characteristics that determine its value, but also to evaluate the reliability of the obtained results and to identify the dominant reaction mechanisms against a background of insignificant ones.The high accuracy of the obtained results and has been demonstrated.