Abstract
Two rotational bands, with energy spacings characteristic of superdeformed shapes, have been observed following bombardment of150Nd with48Ca. The more intensively populated band consists of 18 transitions and is assigned to194Hg. The depopulation of this band occurs around spin 10. The second band, consisting of at least 16 transitions, was populated less strongly and is tentatively assigned to194Hg also. The lowest level in this band is assigned spin 8. The energy differences between transitions for both bands decrease from ∼40 keV at low rotational frequencies to ∼30 keV at the highest observed frequencies. The moments of inertia of the bands are similar to those of the two previously observed superdeformed bands in191,192Hg. The similarities and differences of the four known bands in the mercury region are discussed.
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The cooperation of the 88-Inch Cyclotron staff and of R.A. Belshe and M.K. Lee at the Lawrence Berkeley Laboratory contributed to the success of this experiment and are gratefully acknowledged. This work is supported in part by the U.S. Department of Energy under contract W7405-ENG-48 (LLNL), the SDIO/IST (LLNL), in part by the U.S. Department of Energy under contract DEAC 03-76 SF 00098 (LBL), in part by the National Science Foundation (Rutgers), and in part by the U.S. Department of Energy under contract DE-AC 05-84 OR 21400 (ORNL).