OCTUPOLE CORRELATIONS IN EXCITED BANDS OF SUPERDEFORMED DY-152

RPA calculations, based on the cranked shell model, are performed for superdeformed Dy-152 in which five excited bands have been found recen tly. We show that characteristic features of the observed dynamical mo ments of inertia are well accounted for by explicitly taking the octup ole correlations into account. Importance of the interplay between rot ation and octupole vibrations is stressed, and it is suggested that on e of the observed excited bands might be a collective octupole vibrati on built on the superdeformed yrast band.