Rotational bands in the doubly odd nucleus 134Pr

The band structures of the doubly odd 134Pr nucleus has been investigated via the 119Sn(19F,4n) 134Pr and 110Pd(28Si,p3n) 134Pr reactions at beam energies of 87 and 130 MeV, respectively. The three previously known rotational bands based on the View the MathML source and View the MathML source configurations have been extended to higher spins. The difference of ≈2ħ in the experimental alignment of the bands based on the signature partners of the View the MathML sourceView the MathML source proton orbital is discussed in terms of shape coexistence and coupling with the γ-phonon but no consistent interpretation can be found. A new band consisting of quadrupole transitions has also been identified and linked unambiguously to the low-lying levels of the yrast band. Total routhian surface and cranked shell model calculations suggest a View the MathML source configuration for this band. The experimental ratios of reduced transition probabilities View the MathML source of the various rotational structures are compared to the theoretical values obtained from a semiclassical model and from the two-particle plus triaxial-rotor model.