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We study the origin of a sudden change of the radius of oxygen isotopes at 23O in terms of a coupled-channel model approach. We use the cluster-orbital shell model approach for describing the system. Qualitatively, the sudden change of the radius can be understood as the competition of occupation of the valence neutrons and the component of the core configuration. For the 23O case, the effect of the...
We study the radius and energies of oxygen isotopes towards the neutron drip-line. The abrupt increase of the radius at 23O is investigated with two different approaches; the m-scheme cluster-orbital shell model (COSM) and a simplified model approach with the core plus one and two valence neutrons. We investigate properties of the oxygen isotopes by changing the radius of the 16O-core in the m-scheme...
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