Pairing-plus-quadrupole model and nuclear deformation: A look at the spin-orbit interaction

Jutta Escher, Louisiana State University
Chairul Bahri, Louisiana State University
Dirk Troltenier, Louisiana State University
J. P. Draayer, Louisiana State University


The pairing-plus-quadrupole model, realized in the framework of the Elliott SU(3) scheme, is used to study the combined effects of the quadrupole-quadrupole, pairing, and spin-orbit interactions on ground state shapes of nuclear systems. Relevant measures for nuclear deformation are reviewed. Representation mixing induced by the symmetry-breaking pairing and spin-orbit forces is shown to soften the deformation. The angular momentum dependence of the results is discussed. © 1998 Elsevier Science B.V.