Levels in ${}_{}{}^{196}{}_{}{}^{}\mathrm{Hg}$ have been studied by the ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}(\alpha , 4\mathrm{n})$ reaction and the high-spin level scheme of ${}_{}{}^{196}{}_{}{}^{}\mathrm{Hg}$ has been considerably extended. Backbending in both positive and negative parity yrast level sequences is discussed within the cranked shell model description.

NUCLEAR REACTIONS ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}(\alpha , 4\mathrm{n})$, $E=48.6\mathrm{}$ MeV; measured $E_{\gamma }$, $I_{\gamma }\left(\theta \right)$, $t_{\frac{1}{2}}\left(\gamma \right)$, $\gamma -\gamma$ coin; ${}_{}{}^{196}{}_{}{}^{}\mathrm{Hg}$ deduced high-spin levels, $J$, $\pi$.

• Received 14 June 1983

DOI:https://doi.org/10.1103/PhysRevC.28.1382