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Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$\alpha$ Transition Energies in Helium-like Uranium

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arxiv 2407.04166 v2 pith:37WRNELX submitted 2024-07-04 physics.atom-ph

classification physics.atom-ph
keywords helium-likealphaenergiesuraniumaccurateagreementallowedbound-state
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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$^{90+}$) 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$\alpha$ transitions in U$^{90+}$. 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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. One-loop electron self-energy with accelerated partial-wave expansion in Coulomb gauge

    physics.atom-ph 2024-11 conditional novelty 6.0 of 10

    Coulomb-gauge accelerated partial-wave methods now compute one-loop electron self-energies for hydrogen-like ions from Z=1 to Z=100, including high excited states.

  2. A Bayesian Approach for Strong Field QED Tests with He-like Ions

    physics.atom-ph 2025-01 conditional novelty 5.0 of 10

    A Bayesian reanalysis of helium-like ion transition data finds no significant deviation from QED, reducing earlier frequentist claims to a roughly 2.7 sigma residual.

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