Comparative lifetimes of superdeformed bands in A∼80Nuclei

A comparative measurement of the transition quadrupole moments of the yrast superdeformed bands in 80–83Sr, 83Y, 84Zr has been performed using the Doppler-shift attenuation method. Thus, we have accurately measured the relative deformations of these structures, establishing for the first time, clear trends in the deformations of these bands. The yrast SD bands in the 80–83Sr isotopes are shown to possess similar transition quadrupole moments, while significantly larger values are obtained for the 83Y and 84Zr cases. These results provide a stringent evaluation of the intruder orbital assignments of these structures, suggesting new assignments in some of these cases.