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Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K\(\alpha\) Transition Energies in Helium-like Uranium
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...
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Published in: | arXiv.org 2024-07 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | 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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ISSN: | 2331-8422 |