Elsevier

Nuclear Physics A

Volume 570, Issues 1–2, 28 March 1994, Pages 403-410
Nuclear Physics A

Signature inversion in odd-odd nuclei in the interacting boson-fermion model

https://doi.org/10.1016/0375-9474(94)90307-7Get rights and content

Abstract

The signature inversion in odd-odd nuclei is studied in the interacting boson-fermion model (IBFM). Energy levels and electromagnetic matrix elements are calculated with the SU(3) and the O(6) IBM2 cores. When the particles occupy high-j orbits, the signature inversion occurs with the O(6) core by strong exchange interactions between fermions and the O(6) core. The essential mechanism of the inversion is the mixing of the members of the quasi-γ band into the unfavored states due to the exchange interactions.

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    This work has been supported in part by the Grant-in-Aid for General Scientific Research (No. 01540231) by the Ministry of Education, Science and Culture, and in part by the Japan Society for the Promotion of Science.

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