Multiconfiguration Dirac-Fock calculations of transition energies with QED corrections in three-electron ions

Abstract

We present accurate calculations of the 1${\mathit{s}}^2$2s and 1${\mathit{s}}^2$2p energy levels of lithiumlike ions for 15≤2Z≤92. The multiconfiguration Dirac-Fock method has been used to calculate relativistic effects. One-electron radiative corrections and estimated screening corrections have been calculated. These results are in good agreement with relativistic many-body calculations. General agreement with experimental transition energies (available up to Z=92) is very good.