The decay of the isotopes ${}_{}{}^{111}{}_{}{}^{}\mathrm{Sb}$ ($T_{\frac{1}{2}}=75.5\mathrm{}$ sec), ${}_{}{}^{112}{}_{}{}^{}\mathrm{Sb}$ ($T_{\frac{1}{2}}=51.4\mathrm{}$ sec), ${}_{}{}^{113}{}_{}{}^{}\mathrm{Sb}$ ($T_{\frac{1}{2}}=6.67\mathrm{}$ min), ${}_{}{}^{114}{}_{}{}^{}\mathrm{Sb}$ ($T_{\frac{1}{2}}=3.51\mathrm{}$ min), and ${}_{}{}^{115}{}_{}{}^{}\mathrm{Sb}$ ($T_{\frac{1}{2}}=32.1\mathrm{}$ min) is investigated. Decay schemes are proposed and compared to previously available data and theoretical calculations. Some systematic trends are discussed.

RADIO ACTIVITY ${}_{}{}^{111,112,113,114,115}{}_{}{}^{}\mathrm{Sb}$ [from ${}_{}{}^{\mathrm{}\left(112\right),\left(114\right)\mathrm{}}{}_{}{}^{}\mathrm{Sn}(p, \mathrm{xn} or d, n)$]; measured $T_{\frac{1}{2}}$, $E_{\gamma }$, $\gamma \gamma$ coin; deduced $log\mathrm{ft}$, ${}_{}{}^{111,112,113,114,115}{}_{}{}^{}\mathrm{Sn}$ deduced levels, $J$, $\pi$. Enriched targets, mass separated sources.

• Received 28 October 1975

DOI:https://doi.org/10.1103/PhysRevC.14.229