Description of alpha-clustering of 8Be nucleus states in high-precision theoretical approach

TL;DR

This paper presents a high-precision ab initio theoretical study of 8Be nucleus states, analyzing alpha-clustering and other properties across a wide energy range, with results aligning well with experimental data.

Contribution

It introduces a comprehensive ab initio approach to characterize alpha-clustering in 8Be, including spectroscopic factors and decay widths, and makes new predictions for experimental verification.

Findings

Good agreement with experimental spectroscopic data

Computed alpha-decay widths and cluster form factors

Predictions for unmeasured states and properties

Abstract

Scrupulous theoretical study of 8Be nucleus states, both clustered and non-clustered, is performed over a wide range of the excitation energies. The quantities which characterize the degree of the alpha-clustering of these states: spectroscopic factors, cluster form factors as well as the alpha-decay widths are computed in the framework of an accurate ab initio approach developed. Other basic properties of 8Be spectrum: the binding and excitation energies, mean values of the isospin are calculated simultaneously. In the majority of instances the results of the computations turn out to be in a good agreement with the spectroscopic data. A number of predictions are made and corresponding verification experiment is proposed. Prospects of the developed approach for nuclear spectroscopy are demonstrated.