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Two-loop QED corrections in few-electron ions

V. A. Yerokhin·P. Indelicato·V. M. Shabaev
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Abstract

Results of a calculation valid to all orders in the nuclear-strength parameter Zαare presented for the two-loop Lamb shift, notably for the two-loop self-energy correction, for the ground and first excited states of ions with the nuclear charge numbers Z=60-100. A detailed comparison of the all-order calculation with earlier investigations based on an expansion in the parameter Zαis given. The calculation removes the largest theoretical uncertainty for the 2p_j-2s transition energies in heavy Li-like ions and is important for interpretation of experimental data.

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V. A. Yerokhin, P. Indelicato, V. M. Shabaev. 2006-11-27. Two-loop QED corrections in few-electron ions. https://doi.org/10.1139/p07-022

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