Precessions were measured of the $2_1^{+}$ states in ${}_{}{}^{192}{}_{}{}^{}\mathrm{Os}$ and ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$ in the enhanced transient field in thin cobalt foils and comparison made with similar recent studies of ${}_{}{}^{188}{}_{}{}^{}\mathrm{Os}$ and ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$ ions in Fe foils. It is concluded that (i) the transient field acting on Pt in Fe is singularly anomalous, and (ii) recent contention by Levy et al. that the $g$ factors of even Pt $2_1^{+}$ states may be substantially lower than reported earlier cannot be sustained.

NUCLEAR REACTIONS ${}_{}{}^{192}{}_{}{}^{}\mathrm{Os}$(${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$, ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$′) ${}_{}{}^{192}{}_{}{}^{}\mathrm{Os}$($2_1^{+}$), ${}_{}{}^{192}{}_{}{}^{}\mathrm{Os}$(${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$′)- ${}_{}{}^{192}{}_{}{}^{}\mathrm{Os}$($2_1^{+}$), ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$(${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$, ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$′) ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$($2_1^{+}$), ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$(${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$′) ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$($2_1^{+}$), $E_{\mathrm{S}}=80\mathrm{}$ MeV, $E_{\mathrm{Ni}}=220\mathrm{}$ MeV, enriched targets; measured $W(\theta , H, T)$ in thin polarized Co. Deduced relative transient field strengths $\mathrm{Os}\mathrm{Co}$ and $\mathrm{Pt}\mathrm{Co}$, $\mathrm{Os}\mathrm{Fe}$ and $\mathrm{Pt}\mathrm{Fe}$ for $1.5\%<~\frac{v}{c}<~3.9\%$, deduced $g\left(2_1^{+}\right)$ even Pt isotopes.

• Received 31 August 1982

DOI:https://doi.org/10.1103/PhysRevC.27.434