$\gamma -\gamma$ directional correlation measurements have been carried out and the following $0^{+}$ spin assignments have been made. ${}_{}{}^{122}{}_{}{}^{}\mathrm{Xe}$: 1149 keV level, ${}_{}{}^{124}{}_{}{}^{}\mathrm{Xe}$: 1269 and 1690 keV, ${}_{}{}^{126}{}_{}{}^{}\mathrm{Xe}$: 1313 keV, ${}_{}{}^{128}{}_{}{}^{}\mathrm{Xe}$: 1583 and 2599 keV. In addition, value of $\delta$ for the 493 keV ($2_2^{+}$, → $2_1^{+}$) transition in ${}_{}{}^{124}{}_{}{}^{}\mathrm{Xe}$ has been measured to be $8_{-3\mathrm{}}^{+7\mathrm{}}$.

RADIOACTIVITY ${}_{}{}^{122,124}{}_{}{}^{}\mathrm{Cs}$ [from ${}_{}{}^{124}{}_{}{}^{}\mathrm{Xe}$ ($p$,$\mathrm{xn}$) enriched ${}_{}{}^{124}{}_{}{}^{}\mathrm{Xe}$]; ${}_{}{}^{126,128}{}_{}{}^{}\mathrm{Cs}$ [from ${}_{}{}^{126,128}{}_{}{}^{}\mathrm{Ba}$, ${}_{}{}^{133}{}_{}{}^{}\mathrm{Cs}$ ($p$,$\mathrm{xn}$)]; measured $\gamma \gamma \left(\theta \right)$, ${}_{}{}^{122,124,126,128}{}_{}{}^{}\mathrm{Xe}$ levels. Deduced $J$, $\gamma$-mixing, Ge(Li), and NaI(Tl) detectors.

• Received 28 November 1978

DOI:https://doi.org/10.1103/PhysRevC.19.2409