Cross section for single and double ionization of carbon monoxide by electron impact from threshold up to 180 eV

Journal Article · Wed Nov 15 04:00:00 EST 1978 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.436411· OSTI ID:6878438

Hille, E; Maerk, T D

Electron impact ionization of carbon monoxide has been studied as a function of electron energy up to 180 eV with a double focusing mass spectrometer Varian MAT CH5. Absolute partial ionization cross section functions have been obtained for the processes CO +e..-->..CO/sup +/+2e and CO+e..-->..CO/sup + +/+3e by normalization against the Ar/sup +/ cross section with help of the method of molecular effusive flow. In the case of CO/sup + +/ the results suggest, in accordance with previous authors, that this ion exists in a metastable state with a mean half-life in the range of 6--15 ..mu..s. Using nth root extrapolation, the following minimum ionization potentials have been derived from the low energy cross section function: CO/sup +/(X /sup 2/..sigma../sup +/) = (14.07 +- 0.05) eV and CO/sup + +/= (41.8 +- 0.5) eV. All experimental results presented are compared with previous determinations where available.

• Research Organization: Institut fuer Atomphysik der Universitaet Innsbruck, A 6020 Innsbruck, Osterreich
• OSTI ID: 6878438
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 69:10; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

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