Metastable States ofGe73

The decay of ${\mathrm{As}}^{73}$ to ${\mathrm{Ge}}^{73}$ has been investigated with scintillation counters. The $K$ capture is followed by a 53.9-kev gamma ray which in turn is followed by a 13.5-kev transition to the ground state. The total conversion coefficient of the 53.9-kev gamma is 4.7 and the lifetime is between 900 microseconds and 10 seconds. The half-life of the 13.5-kev transition is 4.6 microseconds. The available evidence points to the 53.9-kev transition being $M2\mathrm{}$ and the 13.5-kev transition $E2\mathrm{}$ with a possible small admixture of $M1\mathrm{}$. Spin and parity assignments are discussed.