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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift


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.


  • 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
Enheter & grupper

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Naturvetenskap
  • Fysik


Sidor (från-till)234-243
TidskriftJournal of Electron Spectroscopy and Related Phenomena
StatusPublished - 2012
Peer review utfördJa