Study on deformed halo nucleus $^{31}$Ne with Glauber model based on microscopic self-consistent structures

TL;DR

This paper combines microscopic structure calculations with reaction models to study the halo structure of $^{31}$Ne, providing improved predictions of reaction observables that support the existence of a neutron halo.

Contribution

It introduces a combined self-consistent structure and reaction approach using DRHBc and Glauber models to analyze halo features in $^{31}$Ne, improving agreement with experimental data.

Findings

Reaction cross sections better match experimental data.

Reaction observables indicate a dilute density distribution consistent with halo.

The model confirms the presence of a neutron halo in $^{31}$Ne.

Abstract

We study the exotic deformed nucleus $^{31}$Ne using an approach that combines self-consistent structure and reaction theory. We utilize the fully-relativistic, microscopic deformed Hartree-Bogoliubov theory in continuum (DRHBc) to demonstrate that deformation and pairing correlations give rise to a halo structure with large-amplitude $p$-wave configuration in $^{31}$Ne. We then use the valence nucleon wave functions and angle-averaged density distributions of $^{30}$Ne from this model as input for a Glauber reaction model to study the observables of neutron-rich Neon isotopes and search for halo signatures. Our predictions of the reaction cross sections of these exotic Neon isotopes on a Carbon target can better reproduce the experimental data than those from relativistic mean field model for a spherical shape with resonances and pairing correlations contributions, as well as those from a Skyrme-Hartree-Fock model. The one-neutron removal cross section at 240 MeV/nucleon, the inclusive longitudinal momentum distribution of the $^{30}$Ne, and the valence neutron residues from the $^{31}$Ne breakup reaction are largely improved over previous theoretical predictions and agree well with data. These reaction data indicate a dilute density distribution in coordinate space and are a canonical signature of a halo structure.