Magnetic moment measurements in osmium and platinum nuclei

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The magnetic moments of the ${2}_{1}^{+}$ states in $^{186,188}\mathrm{Os}$ and $^{194,196}\mathrm{Pt}$ isotopes have been measured by the transient field technique at ion recoil velocities $1.6\ensuremath{\lesssim}\frac{v}{{v}_{0}}\ensuremath{\lesssim}2.8$. The transient field was assumed to follow the parametrization proposed by Shu et al. for ions in the range $8lZl62$. The $g$ factors obtained for osmium isotopes $g(^{186}\mathrm{Os})=0.262(15)$ and $g(^{188}\mathrm{Os})=0.300(15)$ are in excellent agreement with independent M\ossbauer and external field measurements, indicating that the adopted parametrization is valid up to $Z=76$. However, the same analysis yields $g$ factors for the platinum isotopes which are smaller than previously reported: $g(^{194}\mathrm{Pt})=0.203(6)$ and $g(^{196}\mathrm{Pt})=0.213(21)$.NUCLEAR REACTIONS $^{186,188}\mathrm{Os}$($^{32}\mathrm{S}$, $^{32}\mathrm{S}$\ensuremath{'})$^{186,188}\mathrm{Os}$(${2}_{1}^{+}$), $^{194,196}\mathrm{Pt}$($^{32}\mathrm{S}$, $^{32}\mathrm{S}$\ensuremath{'})$^{194,196}\mathrm{Pt}$(${2}_{1}^{+}$); ${E}_{s}\ensuremath{\sim}80$ MeV; enriched targets; measured $W(\ensuremath{\theta},B,\ensuremath{\infty})$ through polarized iron; deduced $g({2}_{1}^{+})$.