MICROSCOPIC DESCRIPTIONS OF COLLECTIVE SD BANDS IN THE A=190 MASS REGION WITH THE GOGNY FORCE

In the framework of microscopic models, we present two methods for des cribing superdeformed (SD) band properties. The first one is the crank ed Hartree-Fock-Bogoliubov (HFB) method, without and with inclusion of particle number projection. The second one is the Gaussian overlap ap proximation to the generator coordinate method (GCM+GOA) with which we treat the five quadrupole collective coordinates. Both methods use th e Gogny force. Moments of inertia and excitation energies of SD bands are calculated and compared with experimental results.