  The wobbling motion of a triaxial rotor coupled to a high-j quasiparticle is
treated semiclassi- cally. Longitudinal and transverse coupling regimes can be
distinguished depending on, respectively, whether the quasiparticle angular
momentum is oriented parallel or perpendicular to the rotor axis with the
largest moment of inertia. Simple analytical expressions for the wobbling
frequency and the electromagnetic E2 and M1 transition probabilities are
derived assuming rigid alignment of the quasiparticle with one of the rotor
axes and harmonic oscillations (HFA). Transverse wobbling is characterized by a
decrease of the wobbling frequency with increasing angular momentum. Two
examples for transverse wobbling, 163Lu and 135Pr, are studied in the framework
of the full triax- ial particle-rotor model and the HFA. The signature of
transverse wobbling, decreasing wobbling frequency and enhanced E2 inter-band
transitions, is found in agreement with experiment.
