The observation of a superdeformed band in the nucleus is reported. The band has sixteen transitions with an average energy spacing of 36 keV and an average dynamic moment of inertia of 112 . This band persists to rather low rotational frequency (ħω∼0.125 MeV) and is proposed to extend in spin from to . No transitions linking the superdeformed states and the low deformation yrast levels were found and the decay out of the superdeformed band appears to be statistical. This is the second case of superdeformation in the A∼190 region.
- Received 7 September 1989
©1990 American Physical Society