Distorted angular distribution of the 2p photoelectrons in argon

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Two consecutive hemispherical electron energy analyzers have been used to measure the argon angular distribution of 2p photoelectron lines over two quadrants of the dipole plane. A significant anomaly in the intensity of the photolines is observed at several electron emission angles, suggesting asymmetry with respect to the electric field vector of synchrotron light. As a possible cause for the observed behavior, we consider an external field affecting the photoelectrons, and show that it is capable of breaking the left-right asymmetry of the angular distribution, giving rise qualitatively to the observed behavior.


  • S. Heinasmaki
  • Samuli Urpelainen
  • M. Huttula
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Sciences
  • Natural Sciences
Original languageEnglish
Article number065302
JournalPhysica Scripta
Issue number6
Publication statusPublished - 2013
Publication categoryResearch