SPECTROSCOPY OF THE SUPERDEFORMED BAND IN PB-196

The superdeformed band in 196Pb has been studied extensively using the reaction Er-170(Si-30,4n) at beam energies of 142, 146, and 151 MeV. New transitions have been added at the top and bottom of the previousl y known band. Gamma-ray directional correlations were measured for mos t of the transitions in the band verifying the expected stretched E2 c haracter. The collectivity of the band has been measured using the Dop pler shift attenuation method yielding an intrinsic quadrupole moment Q0 of 18.3 +/- 3.0 eb, in good agreement with theoretical predictions. The variations of the dynamic moment of inertia J(2) as a function of the rotational frequency homegaBAR have been studied and compared wit h cranked shell model calculations. The dependence of J(2) on mass for superdeformed bands in the Pb isotopes is also investigated.