Reduced Probabilities for E2 Transitions between Excited Collective States of Triaxial Even-Even Nuclei

Reduced probabilities for intra-and interband E2 transitions in excited collective states of even-even lanthanide and actinide nuclei are analyzed on the basis of a model that admits an arbitrary triaxiality. They are studied in detail in the energy spectra of Sm-154, Gd-156, Dy-158, (162),Er-164, (230),Th-232, and (232),(234),(236),U-238 even-even nuclei. Theoretical and experimental values of the reduced probabilities for the respective E2 transitions are compared. This comparison shows good agreement for all states, including high-spin ones. The ratios of the reduced probabilities for the E2 transitions in question are compared with results following from the Alaga rules. These comparisons make it possible to assess the sensitivity of the probabilities being considered to the presence of quadrupole deformations.