Energy Levels inGa69from the Decay ofGe69

Abstract

Using beta- and gamma-scintillation spectrometers for $\gamma -\gamma$ and $\beta -\gamma$ coincidence experiments, the decay of ${\mathrm{Ge}}^{69}$ (40 hr) has been reinvestigated. The main positron branch (1.22 Mev; 93%) proceeds directly to the ground state of ${\mathrm{Ga}}^{69}$. Probably nine higher levels are mainly excited by electron capture transitions. From coincidence relations a tentative decay scheme is proposed. The half-life was found to be 40.4±0.3 hr.