Decay ofPt193

Abstract

The $Q$ value for the electron-capture decay of ${\mathrm{Pt}}^{193}$ has been determined to be 60.8±3.0 keV, from a measurement of the endpoints of the $L$- and $M$-shell capture internal bremsstrahlung. The partial half-life for $L$ capture was found to be 620±250 yr by the determination of the specific activity of a sample.