Relativistic correlation energies are determined by taking the difference between the energies derived from the relativistic many-body perturbation method and those from the Dirac-Fock method for the resonance transitions of Li-, Na-, and Cu-like ions. These correlation energies are combined with the Dirac-Fock energies and ‘‘screened’’ QED corrections based on approximate methods. The resulting theoretical transition energies are compared with available experimental data along isoelectronic sequences to identify irregularities in the data and to predict transition energies of ions whose values are unknown or uncertain.

• Received 26 December 1990

DOI:https://doi.org/10.1103/PhysRevA.44.148