Configuration dependence of deformation in183Au

Abstract

The nucleus ${}^{183}\mathrm{Au}$ was studied via lifetime measurements using the Doppler shift recoil distance method. The reaction used was ${}^{159}\mathrm{Tb}{(}^{28}\mathrm{Si}{,4n)}^{183}\mathrm{Au}$ at a beam energy of 140 MeV. Transition probabilities were measured for the levels of two important bands based on ${i}_{13/2}$ and ${h}_{9/2}$ intruder configurations. The quadrupole moments extracted from measured lifetimes are $\ensuremath{\sim}24%$ larger for the ${i}_{13/2}$ band when compared with the ${h}_{9/2}$ band. The total Routhian surface calculations have been carried out using the cranked Hartree-Fock-Bogoliubov model. The calculations also support a larger deformation for the ${i}_{13/2}$ configuration as compared to the ${h}_{9/2}$ configuration.