2008/03/31 by V. A. Yerokhin, P. Indelicato, В. М. Шабаев +1 · 2 citations
Engineering · Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Combinatorics #Fermion #Loop (graph theory) #Mathematical physics #Order (exchange) #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Physics #Quantum electrodynamics #Quantum mechanics #Remainder #physics.atom-ph
paper · pdf · doi:10.1103/physreva.77.062510
published as Phys. Rev. A 77, 062510 (2008) · Analysis of the finite nuclear size effect is extended in the revised version. 12 pages, 5 figures, 4 tables
arxiv created 2008/04/23 · openalex publication_date 2008/06/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report a calculation of all two-loop quantum electrodynamics corrections with closed fermion loops for the n=1 and n=2 states of H-like ions and for a wide range of the nuclear charge numbers Z=1--100. The calculation is performed to all orders in the binding-strength parameter Z\ensuremathα, with the exception that in a few cases the free-loop approximation is employed in the treatment of the fermion loops. Detailed comparison is made with previous Z\ensuremathα-expansion calculations and the higher-order remainder term to order \ensuremathα2(Z\ensuremathα)6 is identified.