Abstract
A calculation valid to all orders in the nuclear-strength parameter is presented for the two-loop Lamb shift, notably for the two-loop self-energy correction, to the transition energies in heavy Li-like ions. The calculation removes the largest theoretical uncertainty for these transitions and yields the first experimental identification of two-loop QED effects in the region of the strong binding field.
- Received 23 June 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.253004
©2006 American Physical Society