Comparisons of interacting-boson-fermion approximation and triaxial calculations for odd-mass N=80 nuclei

The interacting-boson-fermion-approximation and triaxial models were used to calculate excitation energies and mixing ratios for the N=80 nuclei, 139Pr, 141Pm, and 143Eu. For low-lying negative- and positive-parity states both models yield roughly the same numbers, in good agreement with experimental results. For high-lying states we find that the interacting-boson-fermion-approximation model describes the level structure considerably better than the triaxial model. On the other hand, the triaxial model gives more satisfactory results in predicting the mixing ratios