Five rotational bands involving intruder and/or extruder orbitals have been observed in the doubly-odd nucleus ${}^{132}\mathrm{Pr}.$ One of them is observed for the first time. The properties of the new band are similar to those of the excited highly deformed band of ${}^{134}\mathrm{N}\mathrm{d},$ which has a configuration involving one $i_{13/2}$ neutron at low frequency that is crossed at high frequency by a configuration with two $i_{13/2}$ neutrons. This behavior indicates that the stepwise occupation of $\nu i_{13/2}$ intruder orbitals is an efficient mechanism for building high angular momentum in the light $A\sim 130$ nuclei.

• Received 24 March 1998

DOI:https://doi.org/10.1103/PhysRevC.58.R611