Systematic study of low-lying E1 strength using the time-dependent mean field theory

TL;DR

This paper systematically investigates the electric dipole (E1) strength in nuclei across a wide mass range using a novel time-dependent mean field theory that accounts for pairing and deformation effects.

Contribution

The study introduces the Canonical-basis Time-Dependent Hartree-Fock-Bogoliubov (Cb-TDHFB) theory for analyzing E1 modes, enabling comprehensive analysis of pairing and deformation in nuclear dynamics.

Findings

Neutron-number dependence of low-energy E1 mode identified

Method applicable to both light and heavy nuclei

Provides insights into nuclear structure around N=82

Abstract

We carry out systematic investigation of electric dipole (E1) mode from light to heavy nuclei, using a new time-dependent mean field theory: the Canonical-basis Time-Dependent Hartree-Fock-Bogoliubov (Cb-TDHFB) theory. The Cb-TDHFB in the three-dimensional coordinate space representation can deal with pairing correlation and any kind of deformation in the time-dependent framework. We report the neutron-number dependence of the low-energy E1 mode for light (A < 40) and heavy isotopes (A > 100) around N = 82.