2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204723A shape phase transition is demonstrated to occur in 190W by applying the Projected Shell Model, which goes beyond the usual mean-field approximation. Rotation alignment of neutrons in the high-j, i_{13/2} orbital drives the yrast sequence of the system, changing suddenly from prolate to oblate shape at angular momentum 10$\hbar$. We propose observables to test the picture.9 pages, 3 figures, accepted for publication in Phys. Lett. BNuclear TheoryMesoscale and Nanoscale PhysicsNuclear Experimenttext