A particle-rotor model which incorporates the variable moment of inertia formalism is applied to the N=88 transitional nuclei, ${}_{}{}^{149}{}_{}{}^{}\mathrm{Pm}$, ${}_{}{}^{151}{}_{}{}^{}\mathrm{Eu}$, and ${}_{}{}^{153}{}_{}{}^{}\mathrm{Tb}$. The model with a few adjustable parameters gives a very good account of the ΔI=1, ‘‘normal’’ and ΔI=2 ‘‘decoupled’’ band-like structures observed in these nuclei. The calculated level structure, single-nucleon-transfer spectroscopic factors, electromagnetic transition strengths, and relative gamma-ray branching are compared with available experimental data and predictions of other theoretical calculations.

• Received 20 March 1985

DOI:https://doi.org/10.1103/PhysRevC.32.1026