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Investigation for a Drastic Change of the Core in 23O and 24O
Authors:Hiroshi Masui  Kiyoshi Katō  Kiyomi Ikeda
Institution:1. Information Processing Center, Kitami Institute of Technology, 165 Koen-cho, Kitami, 090-8507, Japan
2. Department of Physics, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
3. The Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198, Japan
Abstract: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 COSM approach and obtain the result that the broad structure of 16O is favored in the 23O and 24O. In the simplified model approach, we estimate the magnitude of the change of the size of 22O in 23O and 24O.
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