skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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/.

Authors:
; ; ;
Publication Date:
Research Org.:
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
OSTI Identifier:
6271170
Resource Type:
Journal Article
Journal Name:
Phys. Rev. A; (United States)
Additional Journal Information:
Journal Volume: 39:9
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Orient, O J, Chutjian, A, Crompton, R W, and Cheung, B. Comparison of experimental and calculated attachment rate constants for CFCl/sub 3/ and CCl/sub 4/ in the temperature range 294--500 K. United States: N. p., 1989. Web. doi:10.1103/PhysRevA.39.4494.
Orient, O J, Chutjian, A, Crompton, R W, & Cheung, B. Comparison of experimental and calculated attachment rate constants for CFCl/sub 3/ and CCl/sub 4/ in the temperature range 294--500 K. United States. https://doi.org/10.1103/PhysRevA.39.4494
Orient, O J, Chutjian, A, Crompton, R W, and Cheung, B. 1989. "Comparison of experimental and calculated attachment rate constants for CFCl/sub 3/ and CCl/sub 4/ in the temperature range 294--500 K". United States. https://doi.org/10.1103/PhysRevA.39.4494.
@article{osti_6271170,
title = {Comparison of experimental and calculated attachment rate constants for CFCl/sub 3/ and CCl/sub 4/ in the temperature range 294--500 K},
author = {Orient, O J and Chutjian, A and Crompton, R W and Cheung, B},
abstractNote = {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/.},
doi = {10.1103/PhysRevA.39.4494},
url = {https://www.osti.gov/biblio/6271170}, journal = {Phys. Rev. A; (United States)},
number = ,
volume = 39:9,
place = {United States},
year = {Mon May 01 00:00:00 EDT 1989},
month = {Mon May 01 00:00:00 EDT 1989}
}