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Substitution effects in elastic electron collisions with CH3 X (X=F, Cl, Br, I) molecules

AuthorsKato, H.; Asahina, T.; Masui, H.; Hoshino, M.; Tanaka, H.; Cho, H.; Ingólfsson, O.; Blanco, F.; García, Gustavo ; Buckman, S.J.; Brunger, M.J.
KeywordsElectron scattering
Elasticity theory
Molecule scattering
Atom scattering
Issue Date2010
PublisherAmerican Institute of Physics
CitationJournal of Chemical Physics 132, 7 (2010)
AbstractWe report absolute elastic differential, integral, and momentum transfer cross sections for electron interactions with the series of molecules CH 3 X (X=F, Cl, Br, I). The incident electron energy range is 50-200 eV, while the scattered electron angular range for the differential measurements is 15°-150°. In all cases the absolute scale of the differential cross sections was set using the relative flow method with helium as the reference species. Substitution effects on these cross sections, as we progress along the halomethane series CH3 F, CH3 Cl, CH3 Br, and CH3 I, are investigated as a part of this study. In addition, atomic-like behavior in these scattering systems is also considered by comparing these halomethane elastic cross sections to results from other workers for the corresponding noble gases Ne, Ar, Kr, and Xe, respectively. Finally we report results for calculations of elastic differential and integral cross sections for electrons scattering from each of the CH3 X species, within an optical potential method and assuming a screened corrected independent atom representation. The level of agreement between these calculations and our measurements was found to be quite remarkable in each case. © 2010 American Institute of Physics.
Identifiersdoi: 10.1063/1.3319761
issn: 0021-9606
Appears in Collections:(CFMAC-IFF) Artículos
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