Abstract
High-spin states in $^{139}\mathrm{Ce}$ have been populated using the $^{130}\mathrm{Te}(^{14}\mathrm{C},5n)$ reaction. The level scheme has been extended to higher spins, including a new band of dipole transitions. The parity of several states has been changed from negative to positive, mainly based on the comparison with the level structure of the core nucleus $^{140}\mathrm{Ce}$ and the results of a realistic shell-model calculation. The dipole band is interpreted as a magnetic rotation band with $\ensuremath{\pi}{h}_{11/2}^{2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}^{\ensuremath{-}1}$ configuration built on small deformation axial shape with $({\ensuremath{\varepsilon}}_{2}=0.12,\ensuremath{\gamma}={0}^{\ensuremath{\circ}})$.
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