Extended Cluster Model for Light, and Medium Nuclei

TL;DR

This paper develops an extended cluster model incorporating tensor forces and higher-order correlations to analyze the structure, electromagnetic transitions, and beta decay of light and medium exotic nuclei, achieving accurate predictions.

Contribution

It introduces an effective Hamiltonian with tensor forces and higher-order correlations to improve modeling of exotic nuclei's properties.

Findings

Accurate calculations of distributions and radii for A=3,4 nuclei.

Good agreement with experimental transition probabilities.

Enhanced understanding of exotic nuclei structure through extended correlations.

Abstract

The structures, the electromagnetic transitions, and the beta decay strengths of exotic nuclei are investigated within an extended cluster model. We start by deriving an effective nuclear Hamiltonian within the $S_2$ correlation operator. Tensor forces are introduced in a perturbative expansion which includes up to the second order terms. Within this Hamiltonian we calculate the distributions and the radii of A=3,~4 nuclei. For exotic nuclei characterized by n valence protons/neutrons we excite the structure of the closed shell nuclei via mixed modes formed by considering correlations operators of higher order. Good results have been obtained for the calculated transitions and for the beta decay transition probabilities.