Decay Scheme ofAu194

Abstract

The radiations of the 40-hr ${\mathrm{Au}}^{194}$ were investigated with a scintillation and a magnetic lens spectrometer, using coincidence techniques. First forbidden positron transitions with endpoints of 1.55±0.02 and 1.21±0.02 Mev were found to lead to the ground state and the first excited state of ${\mathrm{Pt}}^{194}$. Most of the transitions and levels of ${\mathrm{Pt}}^{194}$ known from the decay of ${\mathrm{Ir}}^{194}$ were confirmed. Additional gamma rays of ∼950, 1590±20, 1890±20, and 2150±15 kev were observed, indicating new levels at 2150 and 2215 kev.