Soft Octupole Vibrations with K = 0 and K !=0 Built on Superdeformed Rotational Bands and Static Pairing Correlations

Properties of low-lying octupole vibrations (with K =0, I, 2 and 3) built on superdeformed rotational bands are investigated by means of the RP A in a uniformly rotating frame. Large configuration space composed of 9 major shells is used. Numerical examples are presented for the superdeformed band in 192Hg as a typical case where appreciable amount of static pairing correlations remains at finite values of the rotational frequency. We obtain strongly collective low-frequency octupole vibrations with K=O, 1 and 2. It is shown that the properties of the K=1 octupole vibrations are especially sensitive to the static pairing correlations. The Coriolis-mixings among these soft octupole vibrations are shown to become important when the rotational frequency Wro' <0.2 MeV/n.