Document Type

Article

Publication Date

1994

Publication Title

Journal of Physics B: Atomic, Molecular and Optical Physics

Volume

27

Issue

14

First Page

L311

Last Page

L316

Abstract

Relativistic formulae for the energy level shifts due to electron self-energy corrections are derived within the external potential Bethe-Salpeter formalism. A rigorous treatment of QED corrections to the fine structure splittings of helium is carried out. Although some individual self-energy diagrams give contributions of order α 6mc 2, they are shown to sum to zero. In addition, the α 6mc 2 correction from vertex modifications in the presence of Coulomb photons does not contribute. Therefore, a rigorous treatment of all QED corrections of order α 6mc 2 to the fine structure splittings of helium now appears to be complete. © 1994 IOP Publishing Ltd.

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