Rotational bands in doubly odd ${}_{}{}^{128}{}_{}{}^{}\mathrm{Cs}$

Four rotational band sequences have been established in the doubly odd ${}_{}{}^{128}{}_{}{}^{}\mathrm{Cs}$ nucleus via the ${}_{}{}^{120}{}_{}{}^{}\mathrm{Sn}$${(}^{11}$B,3nγ) reaction. One band shows the characteristic features for the π$h_{11/2}$⊗ν$h_{11/2}$ configuration which has systematically been observed in doubly odd nuclei throughout the A∼130 mass region. Triaxial cranked shell-model calculations have been performed to assist in the assignment of quasiparticle configurations to the other bands.