Pritchard, H. P. and Lima, M. A. P. and McKoy, V. (1989) Studies of elastic e-NH3 collisions. Physical Review A, 39 (5). pp. 2392-2396. ISSN 0556-2791 http://resolver.caltech.edu/CaltechAUTHORS:PRIpra89
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We report differential and momentum-transfer cross sections for elastic scattering of electrons by NH3 for collision energies from 2.5 to 20 eV. These cross sections were obtained in the fixed-nuclei static-exchange approximation using the Schwinger variational principle. Although fixed-nuclei cross sections for electron–polar-molecule collisions are inherently divergent at small angles, such results can provide useful estimates of the differential cross sections at intermediate and larger angles. The agreement at intermediate and larger scattering angles between the calculated and relative experimental cross sections, which are available at 8.5 and 15 eV, is good. The differential cross sections also show evidence of a weak d-wave enhancement around 8 eV. A significant feature seen in these cross sections, particularly at 15 and 20 eV, is their substantial backward peaking beyond 120°.
|Additional Information:||©1989 The American Physical Society Received 17 October 1988 The research was supported by the National Science Foundation under Grant No. PHY-8604242, the Innovative Science and Technology Program of the Strategic Defense Initiative Organization under Contract No. DAAL03-86-K-0140 of the U.S. Army Research Office, and the NASA-Ames Cooperative Agreement NCC2-319. We acknowledge use of the computer resources of the NASA-Ames Research Center. M.A.P.L. also acknowledges support from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazil.|
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|Deposited On:||17 Dec 2006|
|Last Modified:||26 Dec 2012 09:24|
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