The properties of the low-lying levels of '"Te were investigated by the Coulomb excitation process which was effected by bombarding a thick natural tellurium target with 9,5and 10.5-MeV 0. particles and a thick target of isotopically enriched '"Te (95%%uo) with 45-MeV ' 0 ions. Levels at 443.58, 463.39, 671.42, and 729.30 MeV were Coulomb excited and the reduced upward transition probabilities 8(E2t') (e'b) extracted from the. data were: 0.186 + 0.005, 0.158 + 0.005, 0.130 + 0.004, and 0.0059~0.0008. Angular distribution measurements were performed with 42-MeV ' 0 ions. The following results were obtained for the y rays deexciting the 443.58-(3/2') keV level: 8(408. 10)

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Multiple superdeformed rotational bands have been identified in a nucleus for the first time. Cascades of 14, 13, and 11 transitions have been assigned to three bands in 153 Dy. Despite the small intensities, it has been possible to follow the decay of these bands from an angular frequency of 0.7 down to 0.4 MeV/ft. In all three cases, the dynamic moment of inertia J (2) is nearly constant. Assignments to high-TV intruder orbitals are suggested through comparison of these values of J (2) with theoretical calculations based on the cranked shell model.

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