Comparison of experimental and calculated attachment rate constants for CFCl/sub 3/ and CCl/sub 4/ in the temperature range 294--500 K

Journal Article · Mon May 01 00:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.4494· OSTI ID:6271170

Orient, O J; Chutjian, A; Crompton, R W; Cheung, B

Electron-attachment cross sections and rate constants have been measured and calculated for the dissociative attachment processes e+CFCl/sub 3/..-->..Cl/sup -/+CFCl/sub 2/ and e+CCl/sub 4/..-->..Cl/sup -/+CCl/sub 3/. Good agreement over the electron-energy range 1--200 meV is found in energy dependence between present calculated cross sections and experimental (krypton photoionization) cross sections at 300 K. The same calculation, with suitable adjustment of thermal populations, was used to calculate electron-attachment rate constants k(epsilon-c-bar) in the range 50--600 K. Experimental rate constants for CFCl/sub 3/ and CCl/sub 4/ were measured at temperatures of 294, 404, and 496 K (CFCl/sub 3/) and 294, 400, and 500 K (CCl/sub 4/) using the Cavalleri electron-density sampling method. Good agreement is found between present measurements and calculations, poor agreement with flowing-afterglow Langmuir-probe (FALP) data in CFCl/sub 3/ at the higher temperatures, and reasonable agreement with FALP data for CCl/sub 4/.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
• OSTI ID: 6271170
• Journal Information: Phys. Rev. A; (United States), Vol. 39:9
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON TETRACHLORIDE
ELECTRON-MOLECULE COLLISIONS
CHLORINATED ALIPHATIC HYDROCARBONS
FLUORINATED ALIPHATIC HYDROCARBONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DISSOCIATION
ELECTRON ATTACHMENT
EXPERIMENTAL DATA
HIGH TEMPERATURE
MEDIUM TEMPERATURE
MILLI EV RANGE
THEORETICAL DATA
COLLISIONS
DATA
ELECTRON COLLISIONS
ENERGY RANGE
EV RANGE
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
MOLECULE COLLISIONS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena