The phenomenological model we proposed previously to describe simultaneously the ground and $K^{\pi }{=0\mathrm{}}^{-}$ bands in pear shape nuclei is used to describe the recently published data for some Rn isotopes which behave as an octupole vibrator. The application for the isotopes ${}^{222,224,226}\mathrm{Ra}$, where data for high spin states are now available, is also made. Although the two sets of isotopes have a diffierent behavior, they are treated in a unified fashion, and the agreement of predictions with experimental data is excellent.

• Received 23 October 1997

DOI:https://doi.org/10.1103/PhysRevC.57.1512