USE OF THE MULTICONFIGURATION DIRAC-FOCK METHOD IN CALCULATIONS OF PHOTOELECTRON-SPECTRA - THE 4D PHOTOELECTRON-SPECTRA OF BARIUM

A method for calculating the photoelectron spectra is proposed, which involves calculation of the wave functions of atoms and ions by the mu lticonfiguration Dirac-Fock method. The calculated values of the bindi ng energies of 4d electrons in the barium atom coincide with the exper imental values to within 0.1 eV. The relative intensities of spectral lines are in good agreement with experimental data. The calculated cha racters of spectral lines contain significant admixtures of 5d electro nic states.