Parity splitting in the alternating parity bands of some actinide nuclei

An angular momentum dependence of the parity splitting in the alternating parity bands of nuclei with strong octupole correlations is considered basing on the model of the octupole motion in a one-dimensional potential well conserving axial symmetry. A sign reversal of the parity splitting at higher values of the angular momentum is interpreted as a result of the Coriolis coupling to K=1 octupole mode. New experimental data on the spectra of the alternating parity octupole bands are used.