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Low-energy electron scattering from methanol and ethanol

Khakoo, M. A. and Blumer, J. and Keane, K. and Campbell, C. and Silva, H. and Lopes, M. C. A. and Winstead, C. and McKoy, V. and da Costa, R. F. and Ferreira, L. G. and Lima, M. A. P. and Bettaega, M. H. F. (2008) Low-energy electron scattering from methanol and ethanol. Physical Review A, 77 (4). Art. No. 042705. ISSN 1050-2947. doi:10.1103/PhysRevA.77.042705.

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Measured and calculated differential cross sections for elastic (rotationally unresolved) electron scattering from two primary alcohols, methanol (CH3OH) and ethanol (C2H5OH), are reported. The measurements are obtained using the relative flow method with helium as the standard gas and a thin aperture as the collimating target gas source. The relative flow method is applied without the restriction imposed by the relative flow pressure conditions on helium and the unknown gas. The experimental data were taken at incident electron energies of 1, 2, 5, 10, 15, 20, 30, 50, and 100 eV and for scattering angles of 5°–130°. There are no previous reports of experimental electron scattering differential cross sections for CH3OH and C2H5OH in the literature. The calculated differential cross sections are obtained using two different implementations of the Schwinger multichannel method, one that takes all electrons into account and is adapted for parallel computers, and another that uses pseudopotentials and considers only the valence electrons. Comparison between theory and experiment shows that theory is able to describe low-energy electron scattering from these polyatomic targets quite well.

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Additional Information:©2008 The American Physical Society. (Received 23 January 2008; published 9 April 2008) This work was funded by the National Science Foundation through Grant No. PHY 0653452, under a collaborative program with CNPq-Brazil. We acknowledge work on the moveable source control electronics by Dr. James Gregory Childers and Narciso Guzman. Work by V.M. and C.W. was also supported by the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy, and made use of the Jet Propulsion Laboratory’s Supercomputing and Visualization Facility. M.C.A.L., H.S., R.F. da C., L.G.F., M.A.P.L., and M.H.F.B. acknowledge support from Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq, Fundação de Amparo à Pesquisa do Estado de São Paulo FAPESP, Fundação Araucária Paraná State Agency, Finep under project CT-Infra, and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES. Some of the computer calculations in Brazil were performed at the CENAPAD-SP.
Subject Keywords:molecule-electron collisions; organic compounds
Issue or Number:4
Record Number:CaltechAUTHORS:KHApra08b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10090
Deposited By: Archive Administrator
Deposited On:11 Apr 2008
Last Modified:08 Nov 2021 21:05

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