The interacting boson fermion-fermion model is employed in the analysis of the positive-parity doublet bands in [Formula Presented]. It is shown that stable triaxial deformation gives rise to the experimentally observed crossing between the yrast and yrare bands built on the [Formula Presented] configuration. The collective structure of the yrast band is basically built on the ground-state band of the triaxial core, whereas the collective structure of the yrare band is predominantly based on the [Formula Presented] band of the core. The mixing between the two bands increases with angular momentum. A constant energy spacing between the two lowest positive-parity bands is predicted in other odd-odd [Formula Presented] nuclei with [Formula Presented]-soft potential energy surfaces. © 2004 The American Physical Society.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Brant, S., Vretenar, D., & Ventura, A. (2004). Interacting boson fermion-fermion model calculation of the [Formula Presented] doublet bands in [Formula Presented]. Physical Review C - Nuclear Physics, 69(1), 4 -. https://doi.org/10.1103/PhysRevC.69.017304