Lifetimes and Nuclear Moments inOs192andPt192

Lifetimes, nuclear $g$ factors, and $\frac{E2\mathrm{}}{M1\mathrm{}}$ mixing ratios have been determined in ${\mathrm{Os}}^{192}$ and ${\mathrm{Pt}}^{192}$, and some previous determinations reevaluated. The following values have been established. For ${\mathrm{Os}}^{192}$: $g_2=+0.29\mathrm{}\pm 0.05$; $\delta \mathrm{}\left(484\right)=+{{7.6}_{-1.3\mathrm{}}}^{+2.4\mathrm{}}$. For ${\mathrm{Pt}}^{192}$: ${\tau }_2=50.0\mathrm{}\pm 3.4$ psec; ${{\tau }_2}^{\prime }=29\mathrm{}\pm 3$ psec; $g_2=+0.296\mathrm{}\pm 0.022$; ${g_2}^{\prime }=+0.29\mathrm{}\pm 0.05$; $\delta \mathrm{}\left(604\right)=+2.5\mathrm{}\pm 0.2$; $\delta \mathrm{}\left(308\right)=-{{6.3}_{-0.6\mathrm{}}}^{+0.5\mathrm{}}$. Nuclear magnetic moments are analyzed in terms of Greiner's vibrational-rotational model, transition probabilities and $\frac{E2\mathrm{}}{M1\mathrm{}}$ mixing ratios are compared to the theoretical predictions of Kumar and Baranger's model.