2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191086The Interacting Boson Model with broken-pairs has been extended to include mixed proton-neutron configurations in the fermion model space. The extended version of the model has been used to describe high-spin bands in the transitional nucleus $^{136}$Nd. Model calculations reproduce ten bands of positive and negative parity states, including the two dipole high-spin structures based on the $(πh_{11/2})^2$ $(νh_{11/2})^2$ configuration.9 Pages, RevTeX, 5 ps figures, submitted to Phys. Rev. CNuclear Theorytext