Interacting boson-fermion model analysis for159Tb

The result of an IBFM multilevel calculation with the 3s_1/2, 2d_3/2, 2d_5/2 and 1g_7/2 single particle orbits are reported for the first time for the positive parity states of the odd mass nucleus¹⁵⁹Tb. Comparisons are made with experimental data for energy spectra, transition probabilities, mixing ratios, electric quadrupole and magnetic dipole moments. The agreement with the low-lying spectra suggests an extended comparison up to levels with spin 25/2, thereby testing the predictive power of the model.We would like to thank Dr. D. Mac Mahon and the staff at the Imperial College Reactor Centre for their help and use of facilities. We would also like to thank Dr. P. Van Isacker for many illuminating discussions.