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The yrast superdeformed band in 194 Pb has been populated using the 174 Yb( 25 Mg,5n͒ 194 Pb reaction at E beam ϭ130 MeV. Decay ␥ rays were detected using the GAMMASPHERE array at the 88-Inch Cyclotron. Twelve ␥-ray transitions have been observed directly linking three members of the 194 Pb yrast superdeformed band to low-lying normal deformed levels. Anisotropy measurements indicate that these linking decays include E1, M 1, and mixed M 1/E2 multipolarities. The radiative widths deduced are very inhibited, typically B(E1)ϳ10 Ϫ8 Weisskopf units ͑W.u.͒ and B(M 1)ϳ10 Ϫ5 W.u. Without recourse to a priori assumptions J ϭ6 ϩ and E x ϭ4878.4(3) keV have been unambiguously assigned to the lowest-lying observed superdeformed state ͑the state populated by the 170-keV intraband transition͒. The intensity of the observed primaries accounts for 21͑2͒% of the superdeformed band population. ͓S0556-2813͑97͒03105-1͔PACS number͑s͒: 21.10. Re, 23.20.Lv, 25.70.Gh, 27.80.ϩw 174 Yb target was 1.21 mg/cm 2 thick, and evaporated directly onto a 6.13-mg/cm 2 Au backing. The signal-to-noise ratio of the SD primary ␥ rays is enhanced when a thick backing is *Present address: Lawrence Livermore National Laboratory, Livermore, California 94550.

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