Moments of Inertia inYb162at Very High Spins

Two methods have been used to obtain values of the effective moment of inertia of very-high-spin ($20\hslash -50\mathrm{}\hslash$) states populated in heavy-ion compound-nucleus reactions. The ${}_{}{}^{162}{}_{}{}^{}\mathrm{Yb}$ nucleus studied has effective moments of inertia smaller than, but approaching, the rigid-body estimate.