Structure of the four quasiparticle band inSr84

The high spin levels in [sup 84]Sr have been populated through the [sup 59]Co([sup 28]Si, 3[ital p]) reaction using 98 MeV [sup 28]Si beam. A regular band structure was found to develop above the 12[sup +] state with a deformation parameter [beta]=0.21[plus minus]0.04 and [gamma]=8[degree][plus minus]6[degree]. The projected Hartree-Fock calculations predict a two proton and two neutron aligned configuration for this band. The predicted quadrupole moment for this configuration is also in good agreement with the experimental values obtained from the lifetime measurements. In addition, a large enhancement in [ital B]([ital M]1)/[ital B]([ital E]2) transition rates has been observed in the negative parity band above the 11[sup [minus]] state.