Decay Scheme ofY92

The gamma radiations of ${\mathrm{Y}}^{92}$ have been investigated with a scintillation spectrometer. The ${\mathrm{Y}}^{92}$ was produced in a cyclotron by a ($d, \alpha$) reaction on zirconium and was not contaminated with ${\mathrm{Y}}^{91}$ or ${\mathrm{Y}}^{93}$ isotopes present in fission product solutions. Gamma rays of 0.21±0.01, 0.475±0.02, 0.94±0.03, 1.45±0.10, 1.9±0.10, and 2.4±0.10 Mev have been observed and both $\beta -\gamma$ and $\gamma -\gamma$ coincidences of the lower-energy lines tabulated. A decay scheme is proposed which is consistent with the experimental data and with recent data on ${\mathrm{Nb}}^{92}$ and ${\mathrm{Nb}}^{92m}$ reported in the literature.