Influence of moments of inertia on transverse wobbling mode in odd-mass nuclei

Abstract

The reported transverse wobbling band in odd-mass 105 Pd has been reinvestigated by the triaxial particle rotor model. Employing several different parameter sets of moment of inertia (MOI), all of the calculations could be in good agreement with the experimental data, which show distinct modes of rotational excitation, respectively. These modes are sensitive to the ratio between the MOI at intermediate and short axis. With the increase of this ratio, the axis which the total angular momentum wobbles about is changed from the short axis to the intermediate axis. The obtained oscillation modes from calculations are found to be the quantum tunneling between two orientations of angular momentum, which is different from the expected precession. The mechanism of rotational bands in 105 Pd might be a competition between different modes, which show the complexity of the transverse wobbling mode in real odd-mass nuclei.