DoubleK-shell-vacancy production in the decay ofIn114m

The probability $P_{\mathrm{KK}}$ of double $K$-shell-vacancy production per $K$-shell internal conversion of the 192-keV $E4\mathrm{}$ transition in the decay of ${}_{}{}^{114m}{}_{}{}^{}\mathrm{In}$ has been determined by means of a hypersatellite $K{\alpha }^H$-x-ray—$K$-x-ray coincidence experiment using an intrinsic Ge and a NaI(Tl) detector, and by means of a direct measurement of the $K{\alpha }_1^H$- and $K{\alpha }_2^H$-x-ray components with a curved-crystal spectrometer. The results are in good agreement: $P_{\mathrm{KK}}=(10.8\mathrm{}\pm 0.9)\times {10}^{-5\mathrm{}}$ and $P_{\mathrm{KK}}=(9.6\mathrm{}\pm 0.8)\times {10}^{-5\mathrm{}}$, respectively. The average value is $P_{\mathrm{KK}}=(10.2\mathrm{}\pm 0.6)\times {10}^{-5\mathrm{}}$. For the intensity ratio of the $K{\alpha }_1^H$- and $K{\alpha }_2^H$-x-ray components we obtained 1.57±0.17, and for the energy shifts of the two components we obtained, respectively, 566.8±1.4 and 560.2±1.3 eV.