R. Chatterjee, R. Shyam, K. Tsushima, A. W. Thomas
We study the ground-state structure of the near drip-line nucleus 23O within the latest version of the quark-meson coupling model. It predicts a 22O(0+) + n2s_{1/2} configuration for the ground state of 23O, with a one neutron separation energy in close agreement with the corresponding experimental value. The wave function describing the valence neutron-core relative motion obtained within this model, has been 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 our 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.
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http://arxiv.org/abs/1204.2346
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