Electric multipole response of the halo nucleus $^6$He

TL;DR

This paper investigates the electric multipole responses of the halo nucleus $^6$He by including continuum neutron states, revealing the contributions of various configurations to its electromagnetic transitions.

Contribution

It extends previous models by incorporating sd-continuum neutron states to analyze $^6$He’s electromagnetic response more comprehensively.

Findings

Identified the role of sd-continuum states in $^6$He responses.

Analyzed contributions of different configurations to electromagnetic transitions.

Extended understanding of halo nucleus structure and excitations.

Abstract

The role of different continuum components in the weakly-bound nucleus $^6$He is studied by coupling unbound spd-waves of $^5$He by means of simple pairing contact-delta interaction. The results of our previous investigations in a model space containing only p-waves, showed the collective nature of the ground state and allowed the calculation of the electric quadrupole transitions. We extend this simple model by including also sd-continuum neutron states and we investigate the electric monopole, dipole and octupole response of the system for transitions to the continuum, discussing the contribution of different configurations.