Title: Nuclear moments of inertia and wobbling motions in triaxial superdeformed nuclei
Abstract: The wobbling motion excited on triaxial superdeformed nuclei is studied in terms of the cranked shell model plus random phase approximation. First, by calculating at a low rotational frequency the $\ensuremath{\gamma}$ dependence of the three moments of inertia associated with the wobbling motion, the mechanism of the appearance of the wobbling motion in positive-$\ensuremath{\gamma}$ nuclei is clarified theoretically---the rotational alignment of the $\ensuremath{\pi}{i}_{13∕2}$ quasiparticle(s) is the essential condition. This indicates that the wobbling motion is a collective motion that is sensitive to the single-particle alignment. Second, we prove that the observed unexpected rotational-frequency dependence of the wobbling frequency is an outcome of the rotational-frequency dependent dynamical moments of inertia.