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, and Paul Indelicato
Phys. Rev. Lett. 109, 043005 – Published 27 July 2012

Abstract

The 1s2sS131s2S01 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.

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  • Received 31 May 2011

DOI:https://doi.org/10.1103/PhysRevLett.109.043005

© 2012 American Physical Society

Authors & Affiliations

Pedro Amaro1,2, Sophie Schlesser1,*, Mauro Guerra2, Eric-Olivier Le Bigot1, Jean-Michel Isac1, Pascal Travers1, José Paulo Santos2, Csilla I. Szabo1, Alexandre Gumberidze1,3,4, and Paul Indelicato1,†

  • 1Laboratoire Kastler Brossel, Ecole Normale Supérieure, CNRS, Université Pierre et Marie Curie-Paris 6, Case 74, 4 Place Jussieu, F-75005 Paris, France
  • 2Centro de Física Atómica, CFA, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
  • 3ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
  • 4Frankfurt Institute for Advanced Studies FIAS, D-60438 Frankfurt am Main, Germany

  • *Present address: KVI, Theory Group, University of Groningen, 9747 AA Groningen, The Netherlands.
  • paul.indelicato@lkb.ens.fr

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Issue

Vol. 109, Iss. 4 — 27 July 2012

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