Complete ligand-field calculations of energy spectrum and g factor of CaO : Ni2+ and their pressure-induced shifts

The calculations of the whole energy spectrum and the g factor of the groun d state for CaO:Ni2+ at normal pressure and their pressure-induced shifts h ave been carried out on the basis of the theory of pressure-induced shifts and the diagonalization of the complete dg energy matrix in a regular octah edral field. The calculated results are in very good agreement with experim ental data. The physical essentials of the pressure-induced shifts of typic al levels and g factor for the ground state have been revealed by using the wavefunctions and energy spectra at various pressures.