It has been previously proposed to explain gamma-ray staggerings in the
deexcitation of some superdeformed bands in the 150Gd region in terms of a
coupling between global rotation and intrinsic vortical modes. The observed
4ℏ period for the phenomenon is suggested from our microscopic Routhian
calculations using the Skyrme SkM* effective interaction.Comment: 4 pages, LaTeX with RevTeX, 4 included figures, submitted to Phys.
Rep. C (revised version