Excitation of Pygmy Dipole Resonance in neutron-rich nuclei via Coulomb and nuclear fields

TL;DR

This paper investigates the Pygmy Dipole Resonance in neutron-rich nuclei using Hartree-Fock plus RPA calculations, exploring how combined Coulomb and nuclear reactions can reveal the nature of low-lying dipole states.

Contribution

It introduces a method to analyze the Pygmy Dipole Resonance by combining Coulomb and nuclear reaction data within a theoretical RPA framework.

Findings

Identification of characteristic features of Pygmy Dipole Resonance states.

Insights into the role of Coulomb and nuclear interactions in low-lying dipole strength.

Enhanced understanding of neutron-rich nuclei excitation mechanisms.

Abstract

We study the nature of the low-lying dipole strength in neutron-rich nuclei, often associated to the Pygmy Dipole Resonance. The states are described within the Hartree-Fock plus RPA formalism, using different parametrizations of the Skyrme interaction. We show how the information from combined reactions processes involving the Coulomb and different mixtures of isoscalar and isovector nuclear interactions can provide a clue to reveal the characteristic features of these states.