RELATIVISTIC AND QED CALCULATIONS OF ENERGY-LEVELS IN 2-ELECTRON IONS

Methods of including relativistic and QED effects in the calculation of energy levels for two-electron ions are reviewed. New results are presented for relativistic and mass polarization corrections in the 1s3d **1D//1 and **3D//0//,//1//,//2 states, and for the anomalous magnetic moment correction to the 1s2p **3P//0//,//1//,//2 states. Detailed comparisons are made between theory and recent high precision experiments for the fine structure splittings of the 1s2p **3P//0//,//1//,//2 states.