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Elastic differential cross sections for C4F6 isomers in the 1.5-200 eV energy electron impact: Similarities with six fluorine containing molecules and evidence of F-atom like scattering

AutorHoshino, M.; Limão-Vieira, P.; Anzai, K.; Kato, H.; Cho, H.; Mogi, D.; Tanioka, T.; Ferreira Da Silva, F.; Almeida, D.; Blanco, F.; García, Gustavo ; Ingólfsson, O.; Tanaka, H.
Fecha de publicación22-sep-2014
EditorAmerican Institute of Physics
CitaciónJournal of Chemical Physics 141: 124302 (2014)
Resumen© 2014 AIP Publishing LLC. We report absolute elastic differential cross sections for electron interactions with the C4F6 isomers, hexafluoro-1,3-butadiene (1,3-C4F6), hexafluoro-2-butyne (2-C4F6), and hexafluorocyclobutene (c-C4F6). The incident electron energy range is 1.5-200 eV, and the scattered electron angular range for the differential measurements varies from 15° to 150°. In all cases the absolute scale of the differential cross section was set using the relative flow technique, with helium as the reference species. Atomic-like behaviour in these scattering systems is shown here for the first time, and is further investigated by comparing the elastic cross sections for the C4F6 isomers with other fluorinated molecules, such as SF6 and CnF6 (n = 2, 3, and 6). We note that for all the six-F containing molecules, the scattering process for electron energies above 30 eV is indistinguishable. Finally, we report results for calculations of elastic differential cross sections for electron scattering from each of these isomers, within an optical potential method and assuming a screened corrected independent atom representation. The level of agreement between these calculations and our measurements is found to be quite remarkable in all cases.
Descripción11 págs.; 4 figs.; 4 tabs.
Versión del editorhttp://dx.doi.org/10.1063/1.4895903
Identificadoresdoi: 10.1063/1.4895903
issn: 0021-9606
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