Yrast Isomers and Possible Oblate Shape inDy152

Excitation energies, spins, and parities have been determined for ${}_{}{}^{152}{}_{}{}^{}\mathrm{Dy}$ in (HI, $\mathrm{xn}$) reactions up to $I^{\pi }={27}^{+}$. Three isomers with $T_{\frac{1}{2}}=49.5\mathrm{}$ ns ($E_x=5035\mathrm{}$ keV, $I^{\pi }={16}^{+}$), 9.9 ns ($E_x=6076\mathrm{}$ keV, $I^{\pi }={20}^{-}$), and 1.6 ns ($E_x=7828\mathrm{}$ keV, $I^{\pi }={26}^{-}$) have been found. The $g$ factor of the second isomeric state was measured to be $g=0.55\mathrm{}\pm 0.06$.. The present experimental data compares well with microscopic calculations which imply an oblate shape for ${}_{}{}^{152}{}_{}{}^{}\mathrm{Dy}$ at high angular momenta ($I^{\pi }>~{16}^{+}$).