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  A step toward probing higher-order Feynman diagrams in few-electron highly charged ions.

Kubicek, K., Mokler, P. H., Ullrich, J., & Lopez-Urrutia, J. R. C. (2013). A step toward probing higher-order Feynman diagrams in few-electron highly charged ions. Physica Scripta, T156: 014005.

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Kubicek, K.1, Autor           
Mokler, P. H., Autor
Ullrich , J., Autor
Lopez-Urrutia, J. R. C., Autor
Affiliations:
1Research Group of Structural Dynamics of (Bio)chemical Systems, MPI for biophysical chemistry, Max Planck Society, ou_578564              

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 Zusammenfassung: The Lamb shift in medium-heavy H-like and He-like ions has been determined with unprecedented accuracy with a novel x-ray spectroscopy technique. Absolute wavelength measurements of emission lines from trapped highly charged Ar ions thereby achieved uncertainties down to the range of 1.6-2.4 ppm. For the H-like ion Ar17+, the ground state Lamb shift is determined with a 0.4% accuracy, thus excellently confirming quantum electrodynamics (QED) calculations and therefore the hitherto implied suitability of lines from these ionic species as absolute and accurate standards in the x-ray region. Second-order QED terms, i.e. two-electron terms, are also probed for the He-like species Ar16+. Deviations from QED predictions that have recently been claimed are excluded with high significance by the present results.

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Sprache(n): eng - English
 Datum: 2013-09
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1088/0031-8949/2013/T156/014005
 Art des Abschluß: -

Veranstaltung

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Titel: 16th International Conference on the Physics of Highly Charged Ions (HCI)
Veranstaltungsort: Heidelberg/Germany
Start-/Enddatum: 2012-09-02 - 2012-09-07

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Titel: Physica Scripta
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: T156 Artikelnummer: 014005 Start- / Endseite: - Identifikator: -