Beyond mean-field boson-fermion description of odd nuclei

TL;DR

This paper introduces a new theoretical approach combining density functional theory and particle-boson coupling to accurately predict spectroscopic properties of odd-mass and odd-odd nuclei, revealing shape phase transitions and octupole correlations.

Contribution

It presents a novel method integrating DFT and particle-boson coupling for detailed nuclear structure calculations of odd nuclei, extending to odd-odd systems.

Findings

Successfully identified quantum shape phase transitions.

Revealed the role of octupole correlations in odd-mass nuclei.

Extended the method to odd-odd nuclear systems.

Abstract

We develop a novel theoretical method for calculating spectroscopic properties of those nuclei with odd number of nucleons, that is based on the nuclear density functional theory and the particle-boson coupling scheme. Self-consistent mean-field calculation based on the DFT is performed to provide microscopic inputs to build the Hamiltonian of the interacting boson-fermion systems, which gives excitation spectra and transition rates of odd-mass nuclei. The method is successfully applied to identify the quantum shape phase transitions and the role of octupole correlations in odd-mass nuclei, and is extended further to odd-odd nuclear systems.