Observation of a four-electron auger process in near- K -edge photoionization of singly charged carbon ions

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

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Abstract

Single, double, and triple ionization of C1+ ions by single photons is investigated in the energy range of 286-326 eV, i.e., in the range from the lowest-energy K-vacancy resonances to well beyond the K-shell ionization threshold. Clear signatures of C1+(1s2s22p2D2,P2) resonances are found in the triple-ionization channel. The only possible mechanism producing C4+(1s2) via these resonances is direct triple-Auger decay, i.e., a four-electron process with simultaneous emission of three electrons.

Original languageEnglish
Article number013002
JournalPhysical review letters
Volume114
Issue number1
DOIs
Publication statusPublished - Jul 7 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Müller, A., Borovik, A., Buhr, T., Hellhund, J., Holste, K., Kilcoyne, A. L. D., Klumpp, S., Martins, M., Ricz, S., Viefhaus, J., & Schippers, S. (2015). Observation of a four-electron auger process in near- K -edge photoionization of singly charged carbon ions. Physical review letters, 114(1), [013002]. https://doi.org/10.1103/PhysRevLett.114.013002