Article révisé par les pairs
Résumé : Monte Carlo calculations for the spectra of βHR + αHQ, a random two-body hamiltonian (HR) augmented by an SU(3) interaction (HQ) reveal a rapid transition at α ≈ β for spaces exhibiting a well developed rotational band for α {greater-than or approximate} β and purely statistical behaviour for α {less-than or approximate} β. © 1982.