Mass spectrometric investigation of dissociative ionization of toxic gases by electrons at 20–1000 eV
✍ Scribed by B. Adamczyk; K. Bederski; L. Wójcik
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 195 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1076-5174
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✦ Synopsis
Measurements of the dissociative ionization cross-sections of CO, CO,, NO and N,O molecules for electrons from 20 up to lo00 eV were performed. Total collection of ions was achieved by using a specially constructed cycloidal mass spectrometer, an ion source without slit and a collector with large area. In that open ion source the effusion molecular beam formed by a capillary was crossed by the electron beam. Owing to such parameters of the mass spectrometer the mass discrimination effects were reduced. At the ionization of CO molecules, the ions CO+, C+, 0' and C 0 2 + were registered; at CO,, the ions COz+, CO', O', C+ and CO:'; at NO, the ions NO', N', 0' and NO2+; at N,O, the ions N,O+, NO', N , ' , O', ( N ' , N:+) and NZOz+. The relative values of the partial cross-sections were normalized to the absolute total ionization cross-sections obtained by Rapp and Englander-Golden.