High-spin states in ${}^{139}$Pm are investigated via the ${}^{116}$Cd(${}^{27}$Al, 4$n$)${}^{139}$Pm fusion-evaporation reaction at a beam energy of 120 MeV. The previously reported level scheme has been modified because of identifications of some linking and doublet transitions. The revised yrast $\pi h_{11/2}$ band obviously undergoes $\pi h_{11/2}$ $\to$ $\pi {\left(h_{11/2}\right)}^3$ $\to$ $\pi {\left(h_{11/2}\right)}^3$$\otimes$$\nu {\left(h_{11/2}\right)}^{-2}$ band crossings at $\hslash \omega =0.45$ and 0.39 MeV. Two negative-parity dipole bands have been assigned as $\pi h_{11/2}$$\otimes$$\nu {\left(h_{11/2}\right)}^{-2}$ and $\pi h_{11/2}$$\otimes$$\nu {\left(h_{11/2}\right)}^{-4}$ configurations, respectively, and can be considered as examples of magnetic rotational bands.

• Received 6 September 2011

DOI:https://doi.org/10.1103/PhysRevC.84.057302