Levels ofRb93,Sr93, andY93fed in the decays ofKr93,Rb93, andSr93

The $\gamma$ rays and conversion electrons following the ${\beta }^{-}$ decay of ${}_{}{}^{93}{}_{}{}^{}\mathrm{Kr}$, ${}_{}{}^{93}{}_{}{}^{}\mathrm{Rb}$, and ${}_{}{}^{93}{}_{}{}^{}\mathrm{Sr}$ have been measured by applying on-line mass-separation techniques to ${}_{}{}^{235}{}_{}{}^{}\mathrm{U}$ fission products. Level schemes for the three daughter nuclei are proposed based on the study of $\gamma$-singles, $\gamma \gamma$-coincidence, and internal-conversion electron spectra. Internal-conversion coefficients were determined for 10 transitions and the deduced multipolarities as well as $log\mathrm{ft}$ values were combined with known reaction results to assign spins and parities. The half-life for the 758.63-KeV isomeric level in ${}_{}{}^{93}{}_{}{}^{}\mathrm{Y}$ was measured to be 85 ± 15 msec.