ELECTRON-DENSITY IN THE INTERIOR OF NUCLEI WITH ALLOWANCE FOR QED EFFECTS IN THE MANY-ELECTRON THEORY OF ATOMS

In the atoms of heavy elements, the Lamb shift of orbital energies-pre dominantly of the Is-orbital energy-leads to the redistribution of the electron density, primarily of the electron density in nuclei. An eff ective one-electron potential is used to simulate QED effects. With th e aid of perturbation theory implemented within the mean-field method, the changes in the average electron density and in the electron densi ty at the nuclear surface are estimated at 30-35%. Changes in observab les are found to be comparatively small. The proposed approach reprodu ces the experimental optical spectrum of Pt67+ to within 0.02%.