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Cross sections for rotational excitation of CH4 by 3–20-eV electrons

Brescansin, Luiz M. and Lima, Marco A. P. and McKoy, Vincent (1989) Cross sections for rotational excitation of CH4 by 3–20-eV electrons. Physical Review A, 40 (10). pp. 5577-5582. ISSN 0556-2791.

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We report calculated differential, integral, and momentum-transfer cross sections for rotational excitation of CH4 by electron impact in the 3–20-eV energy range. These cross sections were derived from fixed-nuclei scattering amplitudes obtained using the Schwinger multichannel method. Our results represent the first rotational excitation cross sections obtained for a polyatomic molecule using entirely ab initio procedures. The cross sections agree well with those of earlier model-potential calculations. A comparison of these calculated cross sections with available experimental data is in general encouraging, but some discrepancies remain.

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Additional Information:©1989 The American Physical Society Received 19 April 1989 L.M.B. acknowledges support from the Instituto de Estudos Avançados, Centro Técnico Aeroespacial, São José dos Campos, São Paulo, Brasil. M.A.P.L. acknowledges support from the Universidade Estadual de Campinas, Campinas, São Paulo, Brasil. L.M.B. and M.A.P.L. also acknowledge financial support from Brazilian agency Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). The work at the California Institute of Technology is supported by the National Science Foundation under Grant No. PHY-8604242 and the Innovative Science and Technology Program of the Strategic Defense Initiative Organization under U.S. Army Research Office Contract No. DAAL 03-86-K-0140.
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Deposited On:12 Dec 2006
Last Modified:26 Dec 2012 09:22

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