Decay Properties ofSb133

Radiations from the decay of ${}_{}{}^{133}{}_{}{}^{}\mathrm{Sb}$ have been studied with the use of solid-state and scintillator $\gamma$ and $\beta$ detectors. $\gamma$ transitions of ${}_{}{}^{133}{}_{}{}^{}\mathrm{Sb}$ with their relative percent intensities have been measured at 700.2 keV (73.9), 818.4 keV (29.4), 978.9 keV (100.0), 1096.7 keV (45.3), 2441.5 keV (14.5), and 2775.8 keV (26.1). Singles $\gamma$, $\gamma -\gamma$, and $\beta -\gamma$ measurements have been performed, and a decay scheme for ${}_{}{}^{133}{}_{}{}^{}\mathrm{Sb}$ has been constructed consisting of levels at 0, 334, 979, 1152, 1679, and 2776 keV. $\beta$ branches and $log\mathrm{ft}$ values have been deduced. The $Q_{\beta }$ for ${}_{}{}^{133}{}_{}{}^{}\mathrm{Sb}$ has been measured to be 3450±200 keV. The decay scheme is interpreted according to a single-particle shell model. Some $\gamma$ rays have been attributed to ${}_{}{}^{132}{}_{}{}^{}\mathrm{Sb}$, principally one at 1024 keV which is probably the $2^{+}$ first excited level.