Cross section for the production of N2 + (X2Σg +) ions by electron impact on N2

N. Abramzon, R. B. Siegel, K. Becker

Research output: Contribution to journalArticlepeer-review


A combination of electron scattering and laser-induced fluorescence (LIF) techniques has been employed in the direct experimental determination of the N2+ (X2Σg+) ionizati on cross section as a function of electron energy from threshold to 200 eV. Electron impact on N2 produces N2+ ground-state ions that are detected by pumping the X 2Σg+ → B 2Σu+ + (0,0) vibrational transition at 391 nm with a tunable dye laser and detecting the subsequent LIF of the B 2Σu+ → X 2Σg+ (0,1) vibrational transition at 428 nm. LlF spectra obtained at different electron energies yield the relative N2+(X) cross section which is put on an absolute scale by normalization to the absolute cross section value of Doering and Yang [J. Geophys. Res. 102 (1996) 9683] obtained from electron-electron coincidence(e,2e) experiments at 100 eV.

Original languageEnglish (US)
Pages (from-to)147-153
Number of pages7
JournalInternational Journal of Mass Spectrometry
Issue number3
StatePublished - 1999


  • Cross sections
  • Electron-impact ionization
  • Laser-induced fluorescence

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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