1 research outputs found
Structure and Coulomb dissociation of 23O within the quark-meson coupling model
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.Comment: Revised and extended version, accepted for publication in Nucl. Phys.