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Updated: Aug 24, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Electron-electron interaction in strong electromagnetic fields: the two-electron contribution to the ground-state
A Gumberidze1, Th Stöhlker, D Banaś
1Gesellschaft für Schwerionenforschung, 64291 Darmstadt, Germany and Institut für Kernphysik, University of Frankfurt, 60486 Frankfurt, Germany.
Abstract:
Radiative recombination transitions into the ground state of cooled bare and hydrogenlike uranium ions were measured at the storage ring ESR. By comparing the corresponding x-ray centroid energies, this technique allows for a direct measurement of the electron-electron contribution to the ionization potential in the heaviest He-like ions. For the two-electron contribution to the ionization potential of He-like uranium we obtain a value of 2248+/-9 eV. This represents the most accurate determination of two-electron effects in the domain of high-Z He-like ions, and the accuracy reaches already the size of the specific two-electron radiative QED corrections.
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