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

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 $\gamma$ radiation. Combination of the results of these measurements gives unique spin assignments of $4^{+}$ for the 1248- and 1958-keV levels. The determined $\frac{E2\mathrm{}}{M1\mathrm{}}$ mixing ratios are: $\delta \mathrm{}\left(646\right)=0.00\mathrm{}\pm 0.01$ and $\delta \mathrm{}\left(709\right)={0.02}_{-0.07\mathrm{}}^{+0.06\mathrm{}}$.