Proton-hole induced bands in odd-oddSb118,120

Negative parity $\Delta J=1\mathrm{}$ bands were observed in ${}_{}{}^{118,120}{}_{}{}^{}\mathrm{Sb}$ with (${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, $3\mathrm{n}\gamma$) and (${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$, $3\mathrm{n}\gamma$) reactions. Bandhead and level spacing properties are consistent with the $g_{\frac{9}{2}}$ proton-hole collectivity and a decoupled $h_{\frac{11}{2}}$ neutron. These bands decay to the low-lying $(\pi d_{\frac{5}{2}}, \nu h_{\frac{11}{2}})8^{-}$ isomers via several high-spin states, one of which, $7^{\mathrm{}(+)\mathrm{}}$ in ${}_{}{}^{118}{}_{}{}^{}\mathrm{Sb}$, had a measured $t_{\frac{1}{2}}=22.4\mathrm{}\pm 0.5$ ns. Comparisons to $\pi {g_{\frac{9}{2}}}^{-1\mathrm{}}$ $\Delta J=1\mathrm{}$ bands in odd-mass Sb nuclides are made.