Observation of four-electron Auger processes

A. Müller, A. Borovik, T. Buhr, J. Hellhund, K. Holste, A. L D Kilcoyne, S. Klumpp, M. Martins, S. Ricz, J. Viefhaus, S. Schippers

Research output: Contribution to journalArticle

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Abstract

Multiple ionization of ions subsequent to absorption of a single photon has been studied employing a photon-ion merged-beam setup at the PETRA III synchrotron radiation facility of DESY in Hamburg. Absolute cross sections for single, double and triple ionization of C+ ions were measured with emphasis on specific well defined terms of K-shell excited C+. In particular, the terms C+ (1s2s22p2 2D,2P) were excited from the ground level of C+. Subsequent autoionization processes resulted in the production of C2+, C3+ and C4+ ions. The associated decay mechanisms are single-Auger, double-Auger and triple-Auger decay. The observation of C4+ products arising from C+(1s2s22p2 2D,2P) unambiguously confirmed the existence of triple-Auger decay, i.e., a process in which 4 electrons interact with one another such that one fills the K-shell vacancy and the others are simultaneously ejected. The experiment yields branching ratios for the Auger decay channels as well as individual decay rates for autoionization and radiative stabilization of the C+(1s2s22p2 2D,2P) terms.

Original languageEnglish
Article number012033
JournalJournal of Physics: Conference Series
Volume635
Issue number1
DOIs
Publication statusPublished - Sep 7 2015

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autoionization
decay
electrons
ionization
ions
photon beams
decay rates
synchrotron radiation
stabilization
ion beams
cross sections
photons
products

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Müller, A., Borovik, A., Buhr, T., Hellhund, J., Holste, K., Kilcoyne, A. L. D., ... Schippers, S. (2015). Observation of four-electron Auger processes. Journal of Physics: Conference Series, 635(1), [012033]. https://doi.org/10.1088/1742-6596/635/1/012033

Observation of four-electron Auger processes. / Müller, A.; Borovik, A.; Buhr, T.; Hellhund, J.; Holste, K.; Kilcoyne, A. L D; Klumpp, S.; Martins, M.; Ricz, S.; Viefhaus, J.; Schippers, S.

In: Journal of Physics: Conference Series, Vol. 635, No. 1, 012033, 07.09.2015.

Research output: Contribution to journalArticle

Müller, A, Borovik, A, Buhr, T, Hellhund, J, Holste, K, Kilcoyne, ALD, Klumpp, S, Martins, M, Ricz, S, Viefhaus, J & Schippers, S 2015, 'Observation of four-electron Auger processes', Journal of Physics: Conference Series, vol. 635, no. 1, 012033. https://doi.org/10.1088/1742-6596/635/1/012033
Müller A, Borovik A, Buhr T, Hellhund J, Holste K, Kilcoyne ALD et al. Observation of four-electron Auger processes. Journal of Physics: Conference Series. 2015 Sep 7;635(1). 012033. https://doi.org/10.1088/1742-6596/635/1/012033
Müller, A. ; Borovik, A. ; Buhr, T. ; Hellhund, J. ; Holste, K. ; Kilcoyne, A. L D ; Klumpp, S. ; Martins, M. ; Ricz, S. ; Viefhaus, J. ; Schippers, S. / Observation of four-electron Auger processes. In: Journal of Physics: Conference Series. 2015 ; Vol. 635, No. 1.
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