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Studies of electron-molecule collisions - Applications to e-H2OElastic differential and momentum transfer cross sections for the elastic scattering of electrons by H2O are reported for collision energies from 2 to 20 eV. These fixed-nuclei static-exchange cross sections were obtained using the Schwinger variational approach. In these studies the exchange potential is directly evaluated and not approximated by local models. The calculated differential cross sections, obtained with a basis set expansion of the scattering wave function, agree well with available experimental data at intermediate and larger angles. As used here, the results cannot adequately describe the divergent cross sections at small angles. An interesting feature of the calculated cross sections, particularly at 15 and 20 eV, is their significant backward peaking. This peaking occurs in the experimentally inaccessible region beyond a scattering angle of 120 deg. The implication of this feature for the determination of momentum transfer cross sections is described.
Document ID
19870022828
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Brescansin, L. M.
(California Inst. of Tech. Pasadena, CA, United States)
Lima, M. A. P.
(California Inst. of Tech. Pasadena, CA, United States)
Gibson, T. L.
(California Inst. of Tech. Pasadena, CA, United States)
Mckoy, V.
(California Institute of Technology Pasadena, United States)
Huo, W. M.
(Notre Dame, University IN, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1986
Publication Information
Publication: Journal of Chemical Physics
Volume: 85
ISSN: 0021-9606
Subject Category
Atomic And Molecular Physics
Accession Number
87A10102
Funding Number(s)
CONTRACT_GRANT: NCC2-319
CONTRACT_GRANT: NSF PHY-82-12992
CONTRACT_GRANT: NCC2-147
Distribution Limits
Public
Copyright
Other

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