Structure and Coulomb dissociation of 23O within the quark-meson coupling model

TL;DR

This paper investigates the structure and Coulomb dissociation of the nucleus 23O using the quark-meson coupling model, accurately predicting its ground state configuration and reaction outcomes without supporting a neutron halo.

Contribution

It applies the latest QMC model to 23O, providing detailed predictions of its structure and dissociation behavior, aligning well with experimental data.

Findings

Ground state of 23O is [22O(0+) + n (2s_{1/2})]

Calculated Coulomb dissociation matches experimental spectra

No evidence of neutron halo in 23O

Abstract

We study the ground-state structure of nuclei in the vicinity of the one-neutron dripline within the latest version of the quark-meson coupling (QMC) model with a particular emphasis on 23O. For this nucleus the model predicts a [22O(0+) + n (2s_{1/2})] configuration for its ground state, with a one neutron separation energy in close agreement with the corresponding experimental value. The wave function describing the valence neutron-core relative motion was then used to calculate the Coulomb dissociation of 23O on a lead target at a beam energy of 422 MeV/nucleon. The experimental neutron-core relative energy spectrum and the total one-neutron removal cross sections are well described by the calculations. The widths of the longitudinal momentum distributions of the 22O fragment are found to be broad, which do not support the formation of a neutron halo in this nucleus.