Nonaxial shapes of even–even lantanide and actinide nuclei in excited collective states
M. S. NadirbekovInstitute of Nuclear Physics, Uzbek Academy of Sciences, pos. Ulughbek, Tashkent, 100214, Republic of UzbekistanO. A. BozarovInstitute of Nuclear Physics, Uzbek Academy of Sciences, pos. Ulughbek, Tashkent, 100214, Republic of Uzbekistan
ABI
Abstract
Quadrupole-type excited states of even–even nuclei are studied on the basis of arbitrary-triaxiality model. It is shown that the inclusion of high-order terms in the expansion of the rotational-energy operator in the variable γ improves substantially agreement between our theoretical results and respective experimental data. The proposed model makes it possible to explain the intricate character of the spectrum of excited states of even–even lanthanide and actinide nuclei.