Two new isomers were identified: ${}_{}{}^{84}{}_{}{}^{}\mathrm{Y}_{}^m{}_{}{}^{}$ ($1^{+}$) decaying with a 4.6 ± 0.2 sec half-life and ${}_{}{}^{85}{}_{}{}^{}\mathrm{Zr}_{}^m{}_{}{}^{}$, decaying with a 10.9 ± 0.3 sec half-life. A 292.2 keV isomeric transition in ${}_{}{}^{85}{}_{}{}^{}\mathrm{Zr}$ was observed.

RADIOACTIVITY ${}_{}{}^{84}{}_{}{}^{}\mathrm{Y}_{}^{\mathrm{}\left(m\right)\mathrm{}}{}_{}{}^{}$ from ${}_{}{}^{84}{}_{}{}^{}\mathrm{Sr}\mathrm{}(p,n)\mathrm{}$, enriched target measured $E_{\gamma }$, $I_{\gamma }$, deduced $log\mathrm{ft}$. ${}_{}{}^{85}{}_{}{}^{}\mathrm{Zr}_{}^m{}_{}{}^{}$ from ${}_{}{}^{89}{}_{}{}^{}\mathrm{Y}\mathrm{}(p,5n)\mathrm{}$ measured $E_{\gamma }$, $I_{\gamma }$. Ge(Li) detectors.

• Received 17 December 1975

DOI:https://doi.org/10.1103/PhysRevC.13.2075