Deformed Ground-Band States in theN=86NucleusDy152

The ground-band levels of ${}_{}{}^{152}{}_{}{}^{}\mathrm{Dy}$ have been established up to ${18}^{+}$ at 5.8 MeV by ${}_{}{}^{152}{}_{}{}^{}\mathrm{Gd}(\alpha , 4n)$ in-beam experiments with 60-MeV α particles. The band members with $I>~8$ lie above the known ${}_{}{}^{152}{}_{}{}^{}\mathrm{Dy}$ yrast states which are formed by aligned multiparticle configurations typical for a spherical nucleus. An analysis of the ground-band energies in a guage-backbending plot suggests that the ground-band levels with $I>\mathrm{}8\mathrm{}$ are deformed.