In122Isomers

Irradiation of enriched ${}_{}{}^{122}{}_{}{}^{}\mathrm{Sn}$ with 14.8-MeV neutrons was found to produce a new radioactivity with a half-life of 1.5 ± 0.3 sec which was assigned to an isomer of ${}_{}{}^{122}{}_{}{}^{}\mathrm{In}$. The decay of the 7.5-sec ${}_{}{}^{122}{}_{}{}^{}\mathrm{In}$ isomer was also studied and a new half-life of 10.0 ± 0.5 sec determined.