MICROSCOPIC CALCULATIONS FOR O(6) NUCLEI BY THE INTERACTING BOSON MODEL

We present microscopic calculations of the Interacting Boson Model (IB M) based on the shell model interaction by using the OAI mapping appro ach. We determine the collective pairs, which correspond to the IBM bo sons, by the number conserved Hartree-Fock-Bogoluibov (HFB) and the pr oton-neutron Tamm-Dancoff methods, and we take into consideration coup lings to the non-collective degrees of freedom. The present realistic calculations are carried out for the Te, Xe and Ba isotopes. Among the m, the Xe isotopes are known by numerous phenomenological works to sho w the O(6) symmetry. We present the clear O(6) symmetry in the spectra and the wave function which are microscopically obtained.