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

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.

12 pages, 5 figures, 6 tables. arXiv admin note: text overlap with arXiv:2006.14839

References in corpus (6)

• Chiral effective field theory and nuclear forces
• Similarity Renormalization Group for Nucleon-Nucleon Interactions
• Recent developments in no-core shell-model calculations
• Unified ab initio approach to bound and unbound states: no-core shell model with continuum and its application to 7He
• Microscopic calculation of the 3He(alpha,gamma)7Be and 3H(alpha,gamma)7Li capture cross sections using realistic interactions
• $\alpha$-cluster structure of ${}^{18}$O

Cited by in corpus (1)

• Ab initio single-neutron spectroscopic overlaps in lithium isotopes