Microscopic study of wobbling motion in A≈160 nuclei: Lu, Ta, and Tm isotopes

The possible existence of wobbling nuclei in the odd-mass isotope chains of Tm161-169, Lu161-169, and Ta161-169 within the A≈160 nuclei are investigated. The relativistic density functional theory is employed to systematically calculate the configuration, parity, and deformation information of these nuclei. Taking Ta167 as an example, the particle triaxial-rotor model is used to study the wobbling motion built on the π(1h9/2)1 configuration. The energy spectra, electromagnetic transition probability, as well as the angular momentum geometry suggest the existence of a wobbling mode. Hence, Ta167 may be a multiple wobbling nucleus based on the previously observed i13/2 configuration and currently studied h9/2 configuration.