Spin of the 1248- and 1958-keV levels inTe124determined from gamma-gamma directional and polarization-directional correlations

Abstract

Directional correlations and polarization-directional correlations have been measured for the 646-603- and 709-646-keV cascades in $^{124}\mathrm{Te}$ populated from the decay of $^{124}\mathrm{Sb}$. Ge(Li) detectors were used in both spectrometers, one of them, a planar Ge(Li) detector as the linear-polarization analyzer for the $\ensuremath{\gamma}$ radiation. Combination of the results of these measurements gives unique spin assignments of ${4}^{+}$ for the 1248- and 1958-keV levels. The determined $\frac{E2}{M1}$ mixing ratios are: $\ensuremath{\delta}(646)=0.00\ifmmode\pm\else\textpm\fi{}0.01$ and $\ensuremath{\delta}(709)={0.02}_{\ensuremath{-}0.07}^{+0.06}$.RADIOACTIVITY $^{124}\mathrm{Sb}$; measured $\ensuremath{\gamma}\ensuremath{\gamma}(\ensuremath{\theta})$ and $\ensuremath{\gamma}\ensuremath{\gamma}(90\ifmmode^\circ\else\textdegree\fi{} \mathrm{LP})$ (linear-polarization correlation), $^{124}\mathrm{Te}$ deduced $I$ $\ensuremath{\delta}(\frac{E2}{M1})$. Ge(Li) detectors.