Isospin transfer modes in exotic nuclei

TL;DR

This paper introduces a covariant nuclear model that accurately describes spin-isospin responses in exotic nuclei, addressing longstanding issues like strength distribution and quenching, with promising results for both ordinary and exotic nuclei.

Contribution

It presents a novel covariant approach based on extended covariant energy density functional theory for nuclear spin-isospin responses, including fine structure and high-energy strength.

Findings

Successfully describes overall strength distribution up to high energies

Resolves the long-standing quenching problem in nuclear responses

Provides detailed insights into spin-isospin responses of exotic nuclei

Abstract

This work presents an approach to nuclear spin-isospin response, which is capable of describing the overall strength distribution up to high excitation energies, including the fine structure of the low-lying strength, and resolving the long-standing quenching problem. The model is a covariant realization of the nuclear field theory and based on the self-consistent extensions of the covariant energy density functional (CEDF) theory. Results of the recent calculations for spin-isospin response of ordinary and exotic medium-mass nuclei are presented and discussed.