High-spin structure of ${}_{}{}^{139}{}_{}{}^{}\mathrm{Eu}$

The ${}_{\mathrm{}63}{}^{139}{}_{}{}^{}\mathrm{Eu}_{76}^{}{}_{}{}^{}$ nucleus has been investigated by γ-γ coincidence measurements employing the ${}_{}{}^{92}{}_{}{}^{}\mathrm{Mo}$${(}^{50}$Cr,3p) reaction at 220 MeV with both backed and thin self-supporting targets. The high-spin properties have been followed up to a spin of 47/2. The π${\mathit{h}}_{11/2}$ yrast band and its unfavored signature partner both exhibit backbends due to ${\mathit{h}}_{11/2}$ proton alignment. The two signatures of a π${\mathit{g}}_{7/2}$(${\mathit{d}}_{5/2}$) band above the ${\mathit{h}}_{11/2}$ proton alignment were also identified. Interpretations of other structures are discussed.