Gallium 67

Abstract

The electron capture decay of 78-hr ${\mathrm{Ga}}^{67}$ has been investigated with a magnetic lens spectrometer, a proportional counter spectrometer, scintillation spectrometers, and combinations of these spectrometers in coincidence. The experimental data indicate that electron capture occurs to 92-kev, 182-kev, 388-kev, and 880-kev levels in ${\mathrm{Zn}}^{67}$. The lowest level at 92 kev is a metastable one with a half-life of 8.5 μsec. Branching ratios and conversion coefficients have been determined from which consistent spin and parity assignments have been made to the ${\mathrm{Zn}}^{67}$ levels.