Abstract
High-spin states in nucleus 139Pm have been studied using the reaction 116Cd(27Al, 4n)139Pm. Two dipole cascades have been found. Spin and parity assignments were based on the Directional Correlation of Oriented Nuclei (DCO) ratios and systematic behavior in neighboring odd-proton nuclei. The level structures of 139Pm are compared with those of the N = 78 isotone 141Eu in which two dipole bands have been confirmed as magnetic rotational bands. The close similarity between them suggests that the dipole bands in 139Pm may be magnetic rotational bands.
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