An Isomeric State ofGa65

A positron activity of 8.0±0.5 minutes half-life has been assigned to an isomeric state of ${\mathrm{Ga}}^{65}$ on the basis of chemical separation, cross bombardments, and excitation curves. Gamma rays of 52±2, 92±4, and 114±4 kev were measured, which exhibited the 15-minute half-life of the previously known activity of ${\mathrm{Ga}}^{65}$. No 8-minute gamma ray was found.