Ay. Dzyublik et Vy. Denisov, EXCITED-STATE ENERGIES OF EVEN-EVEN NUCLEI WITH QUADRUPOLE AND OCTUPOLE DEFORMATIONS, UKRAINSKII FIZICHESKII ZHURNAL, 37(12), 1992, pp. 1770-1777
Simple analytical expressions are obtained for the energies of even an
d odd vibration-rotation bands in nuclei with quadrupole and octupole
deformations. The calculated energies are in good agreement with exper
imental data for Th and Ra isotopes.