Evidence of the wobbling mode

The wobbling mode is a direct consequence of rotational motion of a triaxial body. The wobbling degree of freedom introduces sequences of bands with increasing number of wobbling quanta and a characteristic DeltaI = 1 decay pattern between the bands in competition with the in-band decay. A favorable candidate for establishing this exotic excitation mode is found for the first time in one of the Lu-isotopes for which stable triaxial superdeformed shapes are expected.