RELATIVISTIC HARTREE-FOCK AND MODEL-POTENTIAL IONIZATION ENERGIES AND OSCILLATOR-STRENGTHS FOR TRANSITIONS IN THE PRINCIPAL, SHARP, AND DIFFUSE SERIES OF NEUTRAL RUBIDIUM AND SILVER WITH ALLOWANCE FOR CORE POLARIZATION

Relativistic single-configuration Hartree-Fock computations of ionization energies and oscillator strengths for transitions in principal, sharp, and diffuse series of neutral rubidium and silver spectra have been performed both with and without allowance for core polarization and are compared with several model-potential calculations. The effect of polarization of the atomic core by the valence electron is included by introducing a polarization potential in the one-electron Hamiltonian and by employing the corresponding correction to the dipole-moment operator of the transition. The results obtained compare well with available experimental data and indicate a significant influence of core polarization on both ionization energies and oscillator strengths. The inclusion of polarization and exchange effects in the model-potential approach and the choice of free parameters is discussed.