The relativistic ab initio model potential versus Dirac-Fock oscillator strengths for silver and gold isoelectronic sequences

The ability of the relativistic ab initio model potential approach with explicit local exchange to produce oscillator strengths in agreement with Dirac-Fock (DF) data is tested for some transitions in silver and gold isoelectronic sequences. It is shown that all three model-potential approaches used, which differ in the local approximation for valence-core electron exchange, yield individual oscillator strengths mostly within 10% of the accurate DF results. The agreement with available experimental data is also discussed.