New insight into the Auger decay process in O2: The coincidence perspective

Tiberiu Arion, Ralph Püttner, Cosmin Lupulescu, Ruslan Ovsyannikov, Marko Förstel, Gunnar Öhrwall, Andreas Lindblad, Kiyoshi Ueda, Svante Svensson, Alex M. Bradshaw, Wolfgang Eberhardt, Uwe Hergenhahn

研究成果: Article査読

7 被引用数 (Scopus)

抄録

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 O2 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 O2 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 3Δu, B 3Πg, and B′ 3Σ 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.

本文言語English
ページ(範囲)234-243
ページ数10
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
185
8-9
DOI
出版ステータスPublished - 2012 9

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

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