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Electron scattering from H2O: Elastic scattering

Khakoo, M. A. and Silva, H. and Muse, J. and Lopes, M. C. A. and Winstead, C. and McKoy, V. (2008) Electron scattering from H2O: Elastic scattering. Physical Review A, 78 (5). Art. No. 052710. ISSN 1050-2947. doi:10.1103/PhysRevA.78.052710.

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Differential cross sections for elastic electron scattering from gaseous water are reported. The measurements are obtained using the relative flow method with He as the standard gas and a thin collimating aperture source of gas instead of a conventional needle source. Differential cross sections were measured at incident energies of 1, 2, 4, 6, 8, 10, 15, 20, 30, 50, and 100 eV for scattering angles ranging from 5° to 130° and integrated over angles to obtain integral cross sections. Corresponding calculations of the differential cross section are carried out using the Schwinger multichannel method, employing extensive basis sets and considering polarization and dipole-scattering effects. Whereas excellent qualitative agreement with past measurements of differential cross sections is observed, our measurements are found to be consistently in significant quantitative disagreement with these measurements. The present calculations, on the other hand, generally agree in magnitude with previous results.

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Additional Information:© 2008 The American Physical Society. (Received 18 September 2008; published 19 November 2008) This work was sponsored by the U.S. National Science Foundation through Grants No. PHY-0653452 and No. PHY-0653396 and by the Brazilian Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq) under a collaborative program. We acknowledge important discussions with Dr. Yukikazu Itikawa (Institute of Space and Aeronautical Science, Japan) and Dr. Fu-Ming Tao (California State University, Fullerton, USA). We thank Dr. M.H.F. Bettega (Universidade Federal do Paraná, Brazil) for sending us tabulated elastic scattering DCSs of Refs. (30,31). Work by C.W. and V.M. was also supported by the Chemical Sciences, Biosciences, and Geosciences Division, Office of Basic Energy Science, 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. and H.S. acknowledge support from CNPq, from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), and from Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG).
Errata:Erratum: Electron scattering from H2O: Elastic scattering [Phys. Rev. A 78, 052710 (2008)] M. A. Khakoo, H. Silva, J. Muse, M. C. A. Lopes, C. Winstead, and V. McKoy Phys. Rev. A 87, 049902 – Published 5 April 2013
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Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)UNSPECIFIED
Subject Keywords:helium; molecule-electron collisions; polarization; water
Issue or Number:5
Record Number:CaltechAUTHORS:KHApra08c
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12415
Deposited By: Archive Administrator
Deposited On:25 Nov 2008 01:00
Last Modified:08 Nov 2021 22:28

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