Study of even-odd N=90 isotones in the IBA-plus-three-fermion model

The even-odd N=90 isotones are studied in the IBA-plus L three-fermion model. It was found that the signature dependence of the energy levels can be reproduced quite well for the levels below the second backbends. The backbending plots of the even-odd isotones show similar features to those of the adjacent even-even isotones. The calculated B(E2) values indicate sudden drops at the band crossing positions.

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