Triaxiality in excited states of lanthanide and actinide even–even nuclei
M. S. NadirbekovInstitute of Nuclear Physics, Ulughbek, Tashkent, 100214, UzbekistanG. A. YuldashevaInstitute of Nuclear Physics, Ulughbek, Tashkent, 100214, Uzbekistan
ABI
Abstract
The energy levels of excited states of ground state, β- and γ-bands of the lanthanide and actinide even–even nuclei have been studied within the Davydov–Chaban model (for three different types of the potential energy of the β-deformations) and approximations for a small and free triaxiality. It is shown that the approximation with a free triaxiality better describes the spectrum of the excited collective states for considered nuclei.