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

Journal Article · Fri Sep 15 04:00:00 EDT 1978 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.436935· OSTI ID:6714562

Maerk, T D; Hille, E

Electron impact ionization of carbon dioxide has been studied as a function of electron energy up to 180 eV with a double focussing mass spectrometer. Absolute partial ionization cross section functions have been measured for the processes CO/sub 2/+e..-->..CO/sub 2//sup +/+2e and CO/sub 2/+e..-->..CO/sub 2//sup + +/+3e by normalization against the Ar/sup +/ ionization cross section. Using nth root extrapolation, the following minimum ionization potentials have been derived from the low energy cross section function: CO/sub 2//sup +/(X /sup 2/Pi/sub g/) =13.79 +- 0.05 eV and I.P.(CO/sub 2//sup + +/) =37.2 +- 0.5 eV. For the doubly ionized parent molecule, a square law dependence of the cross section has been found from threshold up to some 10 eV above onset. All results obtained are compared with previous determinations where available.

• Research Organization: Institut fuer Atomphysik der Universitaet Innsbruck, A 6020 Innsbruck, Austria
• OSTI ID: 6714562
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 69:6; 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 DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EV RANGE 100-1000
IONIZATION
IONIZATION POTENTIAL
MOLECULE COLLISIONS
OXIDES
OXYGEN COMPOUNDS