Detailed spectroscopy and IBFFM interpretation of the odd-odd nuclei 132Pr and 130Pr

High-spin rotational structures in the odd-odd nuclei 130,132Pr have been studied via the View the MathML source reaction at 160 MeV. Several states below the previously reported negative- and positive-parity states have been established through the observation of low-energy transitions, leading to new spin assignments for all observed levels. The bands based on the View the MathML source and View the MathML source configurations have been extended at much higher spins. Detailed interacting boson-fermion-fermion model calculations have been performed for the two nuclei, which reveal the complex structure of the new observed low-lying states. The change from inverted to normal signature at high spin and the staggering pattern of all observed bands are well reproduced, being explained by the interplay between a new term introduced in the boson quadrupole operator and the residual quadrupole-quadrupole interaction.