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Collisions of low-energy electrons with CO_2

Lee, Chuo-Han and Winstead, Carl and McKoy, Vincent (1999) Collisions of low-energy electrons with CO_2. Journal of Chemical Physics, 111 (11). pp. 5056-5066. ISSN 0021-9606. doi:10.1063/1.479761.

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We report cross sections for collisions of low-energy electrons with carbon dioxide obtained by the Schwinger multichannel variational method.Elastic cross sections are obtained in the static-exchange-plus-polarization approximation. We pay particular attention to the position of the ^2Π_u resonance and to the strong enhancement in the integral cross section near zero energy, both prominent features whose accurate treatment requires an accounting for polarization effects. To include such effects in the resonant symmetry, we use an objective and physically motivated criterion to construct a set of configurations that accurately accounts for polarization while avoiding overcorrelation. In addition, we study the origin of the nonisotropic behavior of the elastic differential cross section at very low energies and conclude that it is caused by significant contributions from vibrationally excited CO_2. Cross sections from threshold to 50 eV for excitation of the ^3Σ^+_u, ^1Δ_u, ^3Δ_u, ^3Σ^−_u, and ^1Σ^−_u states that arise from the (^1π_g → ^2π_u) transition are presented for the first time.

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Alternate Title:Collisions of low-energy electrons with CO2
Additional Information:© 1999 American Institute of Physics. (Received 8 December 1998; accepted 8 June 1999) This work was done on the Intel Touchstone Delta and the Intel Paragon systems operated by the Center for Advanced Computing Research (CACR) at Caltech, which is funded in part by the National Science Foundation, and on the CRAY T3D and the CRAY J916 of the Jet Propulsion Laboratory/California Institute of Technology Supercomputing Project. Financial support from the Air Force Office of Scientific Research (AFOSR) is gratefully acknowledged.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20151027-154131093
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Official Citation:Collisions of low-energy electrons with CO2 Chuo-Han Lee, Carl Winstead and Vincent McKoy J. Chem. Phys. 111, 5056 (1999);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61613
Deposited By: George Porter
Deposited On:27 Oct 2015 23:07
Last Modified:10 Nov 2021 22:51

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