Molecular single photon double K-shell ionization

F. Penent, M. Nakano, M. Tashiro, T. P. Grozdanov, M. Žitnik, S. Carniato, P. Selles, L. Andric, P. Lablanquie, J. Palaudoux, E. Shigemasa, H. Iwayama, Y. Hikosaka, K. Soejima, I. H. Suzuki, N. Kouchi, K. Ito

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We have studied single photon double K-shell ionization of small molecules (N2, CO, C2H2n (n = 1-3), . . .) and the Auger decay of the resulting double core hole (DCH) molecular ions thanks to multi-electron coincidence spectroscopy using a magnetic bottle time-of-.ight spectrometer. The relative cross-sections for single-site (K-2) and two-site (K-1K-1) double K-shell ionization with respect to single K-shell (K-1) ionization have been measured that gives important information on the mechanisms of single photon double ionization. The spectroscopy of two-site (K-1K-1) DCH states in the C2H2n (n = 1-3) series shows important chemical shifts due to a strong dependence on the C-C bond length. In addition, the complete cascade Auger decay following single site (K-2) ionization has been obtained.

Original languageEnglish
Pages (from-to)38-42
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Publication statusPublished - 2014 Oct


  • Auger spectroscopy
  • Chemical shift
  • Coincidence electron spectroscopy
  • Double K-shell ionization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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