Electron impact dissociation cross sections for C2F6

D. W. Flaherty, M. A. Kasper, J. E. Baio, D. B. Graves, H. F. Winters, C. Winstead, V. McKoy

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Absolute total dissociation cross sections for electron impact, σt,diss, from 8 to 700 eV are reported for C2F 6. A dense set of data was obtained in the technologically important 8-30 eV energy range relevant to modelling the type of plasmas used in both fundamental and applied scientific investigations. The threshold for dissociation was found to be 12.0 0.2 eV and appears to be associated with a Rydberg state. Estimated values for the total neutral dissociation cross section, σneut,diss, were obtained by subtracting the ionization cross sections (all ionizing events cause dissociation) from the total dissociation cross section. It is shown that a calibration error in a paper by one of us (HFW) caused a distortion of several previous investigations. When the data from the present work are used to recalibrate data from swarm experiments, agreement becomes quite reasonable. There is now a consistent set of data obtained from several investigators which describe the dissociation of C2F6. Neutral dissociation cross sections are obtained from electron-impact excitation calculations and found to be in reasonable agreement with measurements over most of the energy range.

Original languageEnglish (US)
Article number015
Pages (from-to)4393-4399
Number of pages7
JournalJournal of Physics D: Applied Physics
Issue number20
StatePublished - Oct 21 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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