Absolute measurement of the relativistic magnetic dipole transition energy in heliumlike argon

Pedro Amaro, Sophie Schlesser, Mauro Guerra, Eric Olivier Le Bigot, Jean Michel Isac, Pascal Travers, José Paulo Santos, Csilla I. Szabo, Alexandre Gumberidze, Paul Indelicato

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Abstract

The 1s2sS13→1s2S01 relativistic magnetic dipole transition in heliumlike argon, emitted by the plasma of an electron-cyclotron resonance ion source, has been measured using a double-flat crystal x-ray spectrometer. Such a spectrometer, used for the first time on a highly charged ion transition, provides absolute (reference-free) measurements in the x-ray domain. We find a transition energy of 3104.1605(77) eV (2.5 ppm accuracy). This value is the most accurate, reference-free measurement done for such a transition and is in good agreement with recent QED predictions.

Original languageEnglish
Article number043005
JournalPhysical Review Letters
Volume109
Issue number4
DOIs
Publication statusPublished - 27 Jul 2012

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    Amaro, P., Schlesser, S., Guerra, M., Le Bigot, E. O., Isac, J. M., Travers, P., Santos, J. P., Szabo, C. I., Gumberidze, A., & Indelicato, P. (2012). Absolute measurement of the relativistic magnetic dipole transition energy in heliumlike argon. Physical Review Letters, 109(4), [043005]. https://doi.org/10.1103/PhysRevLett.109.043005