Alternating-parity collective states of yrast and nonyrast bands in lanthanide and actinide nuclei
M. S. NadirbekovInstitute of Nuclear Physics, Uzbek Academy of Sciences, pos. Ulughbek, Tashkent, 100214, Republic of UzbekistanG. A. YuldashevaInstitute of Nuclear Physics, Uzbek Academy of Sciences, pos. Ulughbek, Tashkent, 100214, Republic of UzbekistanV. Yu. DenisovInstitute for Nuclear Research, National Academy of Sciences of Ukraine, pr. Nauki 47, 03680, Kyiv, Ukraine
ABI
Abstract
Excited collective states of even-even nuclei featuring quadrupole and octupole deformations are studied within a nonadiabatic collective model with a Gaussian potential energy. Rotational states of the yrast band and vibrational-rotational states of nonyrast bands are considered in detail. The energies of alternating-parity excited states of the yrast band in the 164Er, 220Ra, and 224Th nuclei; the yrast and first nonyrast bands in the 154Sm and 160Gd nuclei; and the yrast, first nonyrast, and second nonyrast bands in the 224Ra and 240Pu nuclei are described well on the basis of the proposed model.