X-ray yields of superdeformed states in 193Hg

The Kα=x-ray yields associated with the superdeformed and normal-deformed bands in 193Hg have been measured. The results indicate an excess yield of Kα-x rays in coincidence with the superdeformed cascade relative to that in coincidence with the normal-deformed cascade. The internal conversion of known transitions along the superdeformed cascade cannot account for the observed Kα-x ray yield. It is likely that this excess x-ray yield is associated with low energy M1 transitions competing with the low-spin superdeformed E2 transitions. These M1 γ rays are expected to connect the two superdeformed bands which are observed in coincidence with each other. Calculations based on the measured γ-ray intensities indicate that within the experimental uncertainties the excess Kα yield can be entirely accounted for by interband-M1 transitions. X-ray yields from the recent 193Hg EUROGAM experiment will also be discussed