Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$\alpha$ Transition Energies in Helium-like Uranium
Atomic Physics
2025-04-18 v2
Abstract
Using novel metallic magnetic calorimeter detectors at the CRYRING@ESR, we recorded X-ray spectra of stored and electron cooled helium-like uranium (U) with an unmatched spectral resolution of close to 90 eV. This allowed for an accurate determination of the energies of all four components of the K transitions in U. We find good agreement with state-of-the-art bound-state QED calculations for the strong-field regime. Our results do not support any systematic deviation between experiment and theory in helium-like systems, the presence of which was subject of intense debates in recent years.
Keywords
Cite
@article{arxiv.2407.04166,
title = {Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$\alpha$ Transition Energies in Helium-like Uranium},
author = {Philip Pfäfflein and Günter Weber and Steffen Allgeier and Zoran Andelkovic and Sonja Bernitt and Andrey I. Bondarev and Alexander Borovik and Louis Duval and Andreas Fleischmann and Oliver Forstner and Marvin Friedrich and Jan Glorius and Alexandre Gumberidze and Christoph Hahn and Daniel Hengstler and Marc Oliver Herdrich and Frank Herfurth and Pierre-Michel Hillenbrand and Anton Kalinin and Markus Kiffer and Felix Martin Kröger and Maximilian Kubullek and Patricia Kuntz and Michael Lestinsky and Yuri A. Litvinov and Bastian Löher and Esther Babette Menz and Tobias Over and Nikolaos Petridis and Stefan Ringleb and Ragandeep Singh Sighu and Uwe Spillmann and Sergiy Trotsenko and Andrzej Warczak and Binghui Zhu and Christian Enss and Thomas Stöhlker},
journal= {arXiv preprint arXiv:2407.04166},
year = {2025}
}