The rotator model in excited collective bands of even deformed nuclei

Abstract

The rotator model is used for separately fitting the - and -bands of even rare earth and actinide collective nuclei. It is shown that in the excited bands the violation of the exact SU(2) rotational symmetry is generally stronger than in the ground-state bands, indicating the presence of non-adiabatic perturbations. The physical content of the parameter q as well as the implications on classification schemes for spectra of deformed nuclei are discussed. Predictions of the model for B(E2) intraband transitions in excited bands are presented and the need for