Measured and calculated absolute total cross-sections for the single ionization of CFx and NFx by electron impact

H. Deutsch, T. D. Märk, V. Tarnovsky, K. Becker, C. Cornelissen, L. Cespiva, V. Bonacic-Koutecky

Research output: Contribution to journalArticlepeer-review


Various additivity rules and the Deutsch-Märk (DM) formalism have been used to calculate total absolute electron-impact cross-sections for single ionization of the CFx (x = 1-3) free radicals, the NFx (x = 1,2) free radicals and the NF3 molecule. A comparison is made with experimentally determined total single ionization cross-sections which have been obtained from recently measured absolute partial ionization cross-sections for the parent and dissociative ionization of these species. The overall best agreement between the measured and the calculated cross-sections in terms of the absolute values, the shapes and the cross-section ordering was obtained using a recently proposed "new" additivity rule. Common trends and tendencies in the ionization cross-sections within each class of targets, CFx and NFx, and between the two target families CFx and NFx are highlighted and a comparison will be made with the previously measured and calculated ionization cross-sections for the SiFx (x = 1-3) free radicals.

Original languageEnglish (US)
Pages (from-to)77-91
Number of pages15
JournalInternational Journal of Mass Spectrometry and Ion Processes
Issue numberC
StatePublished - Oct 6 1994


  • Cross-sections
  • Electron impact ionization
  • Free radicals

ASJC Scopus subject areas

  • Spectroscopy

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