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New insight into the Auger decay process in O-2: The coincidence perspective

  • Tiberiu Arion
  • Ralph Puettner
  • Cosmin Lupulescu
  • Ruslan Ovsyannikov
  • Marko Foerstel
  • Gunnar Öhrwall
  • Andreas Lindblad
  • Kiyoshi Ueda
  • Svante Svensson
  • Alex M. Bradshaw
  • Wolfgang Eberhardt
  • Uwe Hergenhahn
Publiceringsår: 2012
Språk: Engelska
Sidor: 234-243
Publikation/Tidskrift/Serie: Journal of Electron Spectroscopy and Related Phenomena
Volym: 185
Nummer: 8-9
Dokumenttyp: Artikel i tidskrift
Förlag: Elsevier


Photoelectron-Auger electron coincidence spectroscopy is a powerful tool for the investigation of Auger decay processes with different core-ionized intermediate states. In this paper we describe an investigation into the Auger decay of the O-2 molecule, with the purpose of bringing new insight into the dynamics of the core hole decay mechanism. Using a novel experimental approach to measuring such coincidence spectra we report the highest resolution Auger spectrum of O-2 recorded hitherto. In our approach, we have combined the advantages of these coincidence spectra with the high resolution and excellent signal-to-noise ratios of non-coincident Auger spectra and a state-of-the-art fit analysis. In this way we have derived information about the potential energy curves of the final states W-3 Delta(u), B-3 Pi(g), and B' (3)Sigma(-)(u) and concluded that the corresponding Auger transitions are formed to a large part by strongly overlapping vibrational progressions. The present findings are compared to earlier results reported in the literature confirming some theoretical predictions. (C) 2012 Elsevier B.V. All rights reserved.


  • Natural Sciences
  • Physical Sciences
  • High resolution coincidence spectroscopy
  • Auger decay
  • Oxygen
  • Franck-Condon analysis


  • ISSN: 0368-2048

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