Partial dynamical symmetry and the vibrational structure of Cd isotopes

TL;DR

This paper investigates deviations in the vibrational structure of Cd isotopes using a Hamiltonian with partial dynamical symmetry, explaining non-yrast state behaviors through a mixed symmetry approach.

Contribution

It introduces a U(5) partial dynamical symmetry framework within the interacting boson model to explain experimental deviations in Cd isotopes.

Findings

Partial dynamical symmetry explains non-yrast state deviations.

Configuration mixing accounts for intruder state effects.

Model reproduces experimental spectra accurately.

Abstract

The recently reported deviations of selected non-yrast states in $^{110}$Cd from the expected spherical-vibrator behaviour, is addressed by means of an Hamiltonian with U(5) partial dynamical symmetry. The latter preserves the U(5) symmetry in a segment of the spectrum and breaks it in other states. The effect of intruder states is treated in the framework of the interacting boson model with configuration mixing.