Isomer effect in the total electron impact ionization cross section of cyclopropane and propene (C3H6)

H. Deutsch, K. Becker, R. K. Janev, M. Probst, T. D. Märk

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The Deutsch-Maerk (DM) formalism was used to calculate absolute total electron impact ionization cross sections for the two C3H6 isomers cyclopropane (-H2C-CH2-CH2-) and propene (H2C double bond CH-CH3). The agreement between the calculated cross sections and the experimentally determined cross sections (Nishimura H and Tawara H 1994 J. Phys. B: At. Mol. Opt. Phys. 27 2063) is excellent in terms of the absolute magnitude for impact energies below 100 eV and satisfactory for higher impact energies. However, the DM calculation does not reproduce the slight isomer effect that was found in the experimental data: i.e. the measured ionization cross section for propene was found to be larger by a few per cent than the cross section for cyclopropane.

Original languageEnglish (US)
Pages (from-to)L865-L872
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number24
StatePublished - Dec 28 2000


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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