Structure of even-even Cadmium isotopes from the beyond-mean-field interacting boson model

TL;DR

This paper combines self-consistent mean-field calculations with the interacting boson model to analyze the structure of even-even cadmium isotopes, successfully predicting energy levels and transition rates.

Contribution

It introduces a semi-microscopic approach that maps mean-field energy surfaces onto the interacting boson model for cadmium isotopes, providing detailed spectroscopic predictions.

Findings

Accurately reproduces experimental energy spectra.

Predicts intruder states consistent with empirical suggestions.

Provides a qualitative match to observed transition rates.

Abstract

The structure of even-even $^{108-116}$Cd isotopes is investigated based on the self-consistent mean-field approach. By mapping the quadrupole-$(\beta,\gamma)$ deformation energy surface, obtained from the constrained self-consistent mean-field calculations with a choice of the Skyrme force and pairing property, onto the Hamiltonian of the interacting boson model with configuration mixing, the strength parameters of the Hamiltonian are determined. The low-lying excitation spectra and electric quadrupole transition rates for the considered Cd nuclei are computed by the resultant Hamiltonian, and are compared in detail with the experimental data. Our semi-microscopic prediction identifies several intruder states as suggested empirically, and overall, provides a reasonable qualitative description of the experimental energy levels and transition rates.