Self-consistent calculations of the electric giant dipole resonances in light and heavy mass nuclei

TL;DR

This paper improves the understanding of electric giant dipole resonances in nuclei by incorporating many-particle correlations beyond mean-field theory, using the Quasiparticle Time Blocking Approximation with new Skyrme interactions.

Contribution

It introduces a method to accurately calculate giant dipole resonances in nuclei by including correlations beyond mean-field theory with the Quasiparticle Time Blocking Approximation.

Findings

Accurate calculation of giant dipole resonances in $^{16}$O, $^{40}$Ca, and $^{208}$Pb.

Demonstrates the dependence of resonance energies on nucleon number A.

Uses two new Skyrme interactions for improved modeling.

Abstract

While bulk properties of stable nuclei are successfully reproduced by mean-field theories employing effective interactions, the dependence of the centroid energy of the electric giant dipole resonance on the nucleon number A is not. This problem is cured by considering many-particle correlations beyond mean-field theory, which we do within the "Quasiparticle Time Blocking Approximation". The electric giant dipole resonances in $^{16}$O, $^{40}$Ca, and $^{208}$Pb are calculated using two new Skyrme interactions.