Spectroscopic-coincidence techniques have been employed to re-examine the electron capture rate, branching ratio, and positron rate of ${\mathrm{Zn}}^{65}$. Decay by positron emission occurs to the extent of (1.70±0.10)%. Electron capture to the excited state was found to be associated with (51.3±3.0)% of the disintegrations, significantly higher than the (44-46)% reported in previous investigations.

• Received 14 April 1958

DOI:https://doi.org/10.1103/PhysRev.113.287