Va. Yerokhin et al., DIRECT EVALUATION OF THE 2-ELECTRON SELF-ENERGY CORRECTIONS TO THE GROUND-STATE ENERGY LITHIUM-LIKE IONS, Journal of physics. B, Atomic molecular and optical physics, 31(17), 1998, pp. 691-697
We present a calculation of the two-electron self-energy corrections t
o the ground state energy of Li-like ions in the range Z = 20-100. The
calculation is performed both for point and extended nuclei to all or
ders in alpha Z.