Woodin, R. L. and Foster, M. S. and Beauchamp, J. L. (1980) Ion cyclotron resonance studies of radiative and dissociative electron attachment processes at low pressures. Journal of Chemical Physics, 72 (7). pp. 4223-4227. ISSN 0021-9606 http://resolver.caltech.edu/CaltechAUTHORS:WOOjcp80
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Ion cyclotron resonance spectroscopy is used to measure nondissociative electron attachment rate constants for C6F6 (perfluorobenzene), C7F8 (perfluorotoluene), c-C4F8 (perfluorocyclobutane), and C7F14 (perfluoromethylcyclohexane) at low pressure (<10−6 Torr). Infrared emission is assumed to stabilize excited species leading to long-lived molecular negative ions. Combining the present data with negative ion lifetimes measured at low pressures by time-of-flight methods and electron attachment rates measured at high pressures in swarm experiments allows estimates of radiative lifetimes to be made. These all fall in the range from 0.4 to 1.5 msec, which are typical of infrared radiative lifetimes. Data are also presented for dissociative electron attachment to CCl4, where the rate limiting step is shown to be thermalization of the electron energy distribution. A number of different buffer gases are examined and the ion cyclotron resonance results extrapolate to yield the attachment rate measured in high pressure swarm experiments.
|Additional Information:||Copyright © 1980 American Institute of Physics. Received 3 July 1979; accepted 14 August 1979. This work was supported in part by the United States Department of Energy and the President's Fund of the California Institute of Technology. Arthur Amos Noyes Laboratory of Chemical Physics, Contribution No. 5939.|
|Subject Keywords:||ELECTRON ATTACHMENT, IONIZATON, DISSOCIATION, LOW PRESSURE, ION CYCLOTRON RESONANCE SPECTROSCOPY, FLUORINATED AROMATIC HYDROCARBONS, ANIONS, CHEMICAL REACTION KINETICS|
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|Deposited On:||29 Oct 2008 03:38|
|Last Modified:||26 Dec 2012 10:28|
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