Single and double ionization of nitrogen dioxide by electron impact from threshold up to 180 eV

Journal Article · Tue Jul 01 04:00:00 EDT 1980 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.439874· OSTI ID:5364816

Stephan, K; Helm, H; Kim, Y B; Seykora, G; Ramler, J; Groessl, M; Maerk, E; Maerk, T D

Electron impact ionization of nitrogen dioxide has been studied as a function of electron energy up to 180 eV with a double focussing mass spectrometer Varian MAT CH5 and an improved Nier type electron impact ion source. We report the first observation of NO/sub 2//sup + +/ produced via electron impact. Relative partial ionization cross section functions have been obtained for the processes NO/sub 2/+e..-->..NO/sub 2//sup +/+2e and NO/sub 2/+e..-->..NO/sub 2//sup + +/+3e. An accurate measurement of the cross section ratio q (NO/sub 2//sup + +//NO/sub 2/) /q(NO/sub 2//sup +//NO/sub 2/) has been performed. In addition an estimate of the absolute partial cross sections has been made normalizing the measured relative cross section against the Ar/sup +/ cross section with the method of molecular effusive flow. Using the nth root extrapolation the following ionization potentials have been derived from the cross section functions near threshold: NO/sub 2//sup +/10,4=(plus-or-minus0,3) eV and NO/sub 2//sup + +/35,0=(plus-or-minus0,5) eV.

• Research Organization: Abteilung fuer Kernphysik und Gaselektronik, Institut fuer Experimentalphysik, Leopold Franzens Universitaet, A 6020 Innsbruck, Osterreich
• OSTI ID: 5364816
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:1; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CHALCOGENIDES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
IONIZATION
MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS