Abstract
The self-energy (SE) correction is evaluated for a single valence $\mathrm{ns}$ electron of heavy and superheavy atoms with n up to 8 and the nuclear charge Z up to 119. The recently developed approach based on the commutator expansion is employed. Various Dirac-Slater one-electron local potentials with extended nuclei are used. The Lamb shifts were calculated by adding the average values of the Uehling potential to the SE contributions. The results confirm the earlier estimates for the quantum electrodynamical effects on the valence energies of heavy and superheavy atoms.
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