Neutron Removal from the Deformed Halo 31Ne Nucleus

TL;DR

This paper develops a model to study neutron removal from the deformed halo nucleus 31Ne, analyzing how nuclear deformation affects reaction cross sections and momentum distributions, and suggests a 3/2- ground state.

Contribution

It introduces a new dynamical knockout model incorporating deformation and orientation dependence for neutron removal in 31Ne.

Findings

Deformation significantly influences cross sections and momentum distributions.

Numerical results favor a 3/2- ground state for 31Ne.

The model provides detailed insights into the effects of nuclear shape on reactions.

Abstract

Experimental data on Coulomb breakup and neutron removal indicate that 31Ne is one of the heaviest halo nuclei discovered so far. The possible ground state of 31Ne is either 3/2- coming from p-wave halo or 1/2+ from s-wave halo. In this work, we develop a treatable model to include deformed wave functions and a dynamical knockout formalism which includes the dependence on the nuclear orientation to study the neutron removal from 31Ne projectiles at energies around E=200 MeV/nucleon. A detailed account of the effects of deformation on cross sections and longitudinal momentum distributions is made. Our numerical analysis indicates a preference for the 31Ne ground state with spin parity 3/2-.