Coupled-channel picture of the core nucleus for the expansion of the nuclear size in the drip-line region

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Masui, Hiroshi^1 ; Kato, Kiyoshi^2 ; Ikeda, Kiyomi^3

Information Processing Center, Kitami Institute of Technology, Kitami

090-8507, Japan^1

Nuclear Reaction Data Centre, Hokkaido University, Sapporo

060-0810, Japan^2

RIKEN Nishina Center, Wako

351-0198, Japan^3

关键词: Coupled channels;    Coupled-channel approach;    Neutron-rich nuclei;    Nuclear sizes;    Oxygen isotopes;    Shell models;    Sudden change;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012043/pdf
DOI  :  10.1088/1742-6596/569/1/012043

来源: IOP

【 摘 要 】

We study the energy and radius of neutron rich nuclei toward to the drip-line region. We employ the cluster-orbital shell model approach to calculate the radius of the oxygen isotopes. The result shows that the calculated radius underestimates the observed one at23O, though the binding energy and the drip-line of the oxygen isotopes are reproduced. Therefore, we propose a coupled-channel approach to explain the sudden increase of the radius of the oxygen isotopes at23O. As a result, the sudden change of the radius can be descried in terms of the competition between the available valence neutron orbits and occupied orbits in the core nucleus. For the23O case, we show that the excitation to the 1s1/2-orbit in the core nucleus is a key configuration to reproduce the radius.