Deformation effects in Giant Monopole Resonance
  The isoscalar giant monopole resonance (GMR) in Samarium isotopes (from spherical $^{144}$Sm to deformed $^{148-154}$Sm) is investigated within the Skyrme random-phase-approximation (RPA) for a variety of Skyrme forces. The exact RPA and its separable version (SRPA) are used for spherical and deformed nuclei, respectively. The quadrupole deformation is shown to yield two effects: the GMR broadens and attains a two-peak structure due to the coupling with the quadrupole giant resonance. 
J. Kvasil, V.O. Nesterenko, A. Repko, D. Bozik, W. Kleinig and P.-G.   Reinhard
nucl-th