Absolute partial and total electron ionization cross sections for CCl/sub 4/ from threshold up to 180 eV

Journal Article · Sat Dec 01 04:00:00 EST 1984 · Plasma Chem. Plasma Process.; (United States)

DOI:https://doi.org/10.1007/BF00568978· OSTI ID:5343273

Leiter, K; Mark, E; Mark, T D; Stephan, K

Electron impact ionization of carbon tetrachloride was studied as a function of electron energy from threshold up to 180eV. A double-focusing mass spectrometer system in combination with an improved electron impact on source was used, alleviating the problems of ion extraction from the source and the transmission of the extracted ions through the mass spetrometer system. Absolute partial ionization cross sections for the occurrence of CCl/sub 3//sup +/, CCl/sub 2//sup +/, CCl/sup +/, Cl/sub 2//sup +/, Cl/sup +/, CCl/sub 3//sup 2 +/, and CCl/sub 2//sup 2 +/ have been determined. In addition, the total ionization cross-section function of CCl/sub 4/ is reported and compared with theoretical predictions based on a classical binary encounter approximation. Using nth root extrapolation the following ionization energies of the doubly ionized fragment ions have been derived: AE(CCl/sub 3//sup 2 +/)=30.4 + or - 0.3eV; and AE (CCl/sub 2//sup 2 +/)=31.8 + or - 0.3 eV. In accordance with theoretical predictions and previous results, no stable CCl/sub 4//sup +/ has been detected, however, metastable dissociation processes CCl/sub 4//sup +/..-->.. CCl/sub 3//sup +/ have been observed.

• Research Organization: L. Franzens Univ. Innsbruck
• OSTI ID: 5343273
• Journal Information: Plasma Chem. Plasma Process.; (United States), Journal Name: Plasma Chem. Plasma Process.; (United States) Vol. 4:4; ISSN PCPPD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
BEAM EXTRACTION
BEAMS
CALCULATION METHODS
CARBON IONS
CARBON TETRACHLORIDE
CHARGED PARTICLES
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE IONS
COLLISIONS
CROSS SECTIONS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
EXTRAPOLATION
HALOGENATED ALIPHATIC HYDROCARBONS
ION SOURCES
IONIZATION
IONIZATION POTENTIAL
IONS
MASS SPECTROMETERS
MEASURING INSTRUMENTS
MOLECULAR BEAMS
MOLECULAR IONS
MOLECULE COLLISIONS
NUMERICAL SOLUTION
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PLASMA DIAGNOSTICS
SPECTROMETERS