Disintegration ofSn113

Abstract

A re-investigation of the decay of 119-day ${\mathrm{Sn}}^{113}$ was carried out with scintillation spectrometers, as well as with lithium-drifted silicon and germanium detectors. In addition to x rays, two $\gamma$ rays of 0.2555±0.0005 and 0.3910±0.0005 MeV were found of relative intensity (2.9±0.3)×${10}^{-2\mathrm{}}$. The $K$-conversion coefficient of the 0.2555-MeV transition was measured to be 0.040±0.0006 and that of the 0.3910-MeV transition, 0.49±0.04 [$\frac{K}{\mathrm{}(L+M)\mathrm{}}=4.2\mathrm{}\pm 0.4$]. The electron-capture ratio $\frac{P_{\mathrm{EC}}(L+M+\cdots )}{P_{\mathrm{EC}}\mathrm{}\left(K\right)\mathrm{}}$ to the 0.6465-MeV level of ${\mathrm{In}}^{113}$ was determined to be 0.33±0.14. The bremsstrahlung endpoint energy to the same level was (0.080±0.005 MeV). From these values, the decay energy transitions to that level were deduced to be 0.050-0.110 MeV and (0.110±0.005) MeV, respectively. A decay scheme is constructed.