Published November 1, 1985
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Journal Article
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Studies of electron–polyatomic-molecule collisions: Applications to e-CH4
Abstract
We report the first application of the Schwinger multichannel formulation to low-energy electron collisions with a nonlinear polyatomic target. Integral and differential cross sections are obtained for e-CH4 collisions from 3 to 20 eV at the static-plus-exchange interaction level. In these studies the exchange potential is directly evaluated and not approximated by local models. An interesting feature of the small-angle differential cross section is ascribed to polarization effects and not reproduced at the static-plus-exchange level. Our differential cross sections are found to be in reasonable agreement with existing measurements at 7.5 eV and higher energies.
Additional Information
©1985 The American Physical Society. Received 8 April 1985. One of us (M.A.P.L.) acknowledges financial support from the Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, Brazil. This material is based upon research supported by the National Science Foundation under Grant No. PHY-82-13992. The research of W.M.H. is supported by the National Aeronautics and Space Administration under NASA-Ames Cooperative Agreement No. NCC 2-147.Files
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