Decay ofIr194andOs194

The abundances of the gamma rays at 293, 301, and 328 keV arising from ${\mathrm{Ir}}^{194}$ decay were measured and found to be (2.6±0.4)%, (0.39±0.07)%, and (13.0±1.8)%, respectively. These values are substantially lower than those reported in earlier work but are in fair agreement with another recent study of ${\mathrm{Ir}}^{194}$ decay. Since some recent studies of ${\mathrm{Os}}^{194}$ decay were made relative to the decay properties of its daughter activity ${\mathrm{Ir}}^{194}$, these ${\mathrm{Os}}^{194}$ data must also be corrected. After correction, the discrepancies between various ${\mathrm{Os}}^{194}$ studies are considerably reduced. The best values for the energies and abundances, respectively, of the ${\mathrm{Os}}^{194}$ radiations observed are ${\beta }_1$, $97\pm 2 \mathrm{keV} (=Q_{\beta })$, (67±8)%; ${\gamma }_1$, 43.1±0.3 keV (in coincidence with ${\beta }_2$, 54.5±2 keV), (33±8)%; and ${\gamma }_2$, 82±1 keV, ∼0.05%.