Abstract
Lifetimes have been measured for states in five superdeformed yrast bands in 193−196Pb using the Gammasphere spectrometer array. Centroid shifts and lineshapes of transitions showing attenuated Doppler shifts have been analyzed. Transition quadrupole moments are deduced for the five bands including, for the first time, bands of two odd-A Pb isotopes. The quadrupole moments are found to be remarkably similar for the yrast bands in 194Pb (band 1), 195Pb (bands 1 and 2) and 196Pb (band 1) (Q t ≈20 b). However, for 193Pb a smaller value, Q t =17.3(7) b, is obtained. This can be explained in terms of the occupation of the neutron N = 7 intruder orbitals.
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