Phys. Rev. A 64, 022502 (2001) [9 pages]Determination of the two-loop Lamb shift in lithiumlike bismuthReceived 1 March 2001; revised 14 March 2001; published 9 July 2001 The energy levels of lithiumlike bismuth are shown to be accurately described in a representation-independent manner when all diagrams involving one and two photons, with the exception of the two-loop Lamb shift, are evaluated. Comparison with the experimental value of the 2p3/2-2s1/2 splitting then shows that, assuming three-photon effects are negligible, the contribution of the two-loop Lamb shift is 0.175(39) eV. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.64.022502
DOI:
10.1103/PhysRevA.64.022502
PACS:
31.30.Jv, 31.10.+z, 31.25.Eb
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