SYSTEMATICS OF BETA-PARAMETER AND GAMMA-PARAMETER OF O(6)-LIKE NUCLEIIN THE INTERACTING BOSON MODEL

By comparing quadrupole moments between the interacting boson model (I BM) and the collective model, a simple calculation for the triaxial de formation parameters beta and gamma in the O(6)-like nuclei is present ed, based on the intrinsic frame in the IBM. The systematics of the be ta and gamma are studied, The realistic cases are calculated for the e ven-even Xe, Ba, and Ce isotopes. and the smooth dependences of the st rength ratios theta(3)/kappa and the effective charges e(2) on the pro ton and neutron boson numbers N-pi and N-v are discovered.