Abstract
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 language | English (US) |
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Pages (from-to) | 147-153 |
Number of pages | 7 |
Journal | International Journal of Mass Spectrometry |
Volume | 188 |
Issue number | 3 |
DOIs | |
State | Published - 1999 |
Keywords
- Cross sections
- Electron-impact ionization
- Laser-induced fluorescence
ASJC Scopus subject areas
- Instrumentation
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry