g-Factor Measurements inOs192andPt192

The $g$ factors of the first $2^{+}$ state in ${\mathrm{Os}}^{192}$ and the first and second $2^{+}$ states in ${\mathrm{Pt}}^{192}$ have been measured by $\gamma -\gamma$ perturbed angular correlation using Ge(Li) and NaI(Tl) spectrometers. The results are ${g_2}^{+}\left({\mathrm{Os}}^{192}\right)=0.28\mathrm{}\pm 0.04$, ${g_2}^{+}\left({\mathrm{Pt}}^{192}\right)=0.28\mathrm{}\pm 0.03$, and ${g_{2^{\prime }}}^{+}\left({\mathrm{Pt}}^{192}\right)=-0.13\mathrm{}\pm 0.07$. While the first and second quoted results agree well with calculation based on collective models, the last result gives evidence for a predominantly noncollective excitation.