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A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Feb 2013 Spain, Australia Publisher:AIP PublishingJournal:The Journal of Chemical Physics, volume 138 (issn: 0021-9606, eissn: 1089-7690,

Authors: Stephen Buckman; Sakamoto Yoshio; Masamitsu Hoshino; H. Tanaka; Francisco J. Blanco; H. Murai; T. Mitsumura; +6 Authors

doi: 10.1063/1.4788666

pmid: 23406114

handle: 10261/79387 , 2328/26632 , 1885/38462

A comprehensive and comparative study of elastic electron scattering from OCS and CS2 in the energy region from 1.2 to 200 eV

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Abstract

We report absolute differential cross sections (DCSs) for elastic electron scattering from OCS (carbonyl sulphide) and CS2 (carbon disulphide) in the impact energy range of 1.2–200 eV and for scattering angles from 10° to 150°. Above 10 eV, the angular distributions are found to agree quite well with our present calculations using two semi-phenomenological theoretical approaches. One employs the independent-atom model with the screening-corrected additivity rule (IAM-SCAR), while the other uses the continuum-multiple-scattering method in conjunction with a parameter-free exchange-polarization approximation. Since OCS is a polar molecule, further dipole-induced rotational excitation cross sections have been calculated in the framework of the first Born approximation and incoherently added to the IAM-SCAR results. In comparison with the calculated DCS for the S atom, atomic-like behavior for the angular distributions in both the OCS and CS2 scattering systems is observed. Integrated elastic cross sections are obtained by extrapolating the experimental measurements, with the aid of the theoretical calculations, for those scattering angles below 10° and above 150°. These values are then compared with the available total cross sections.

Countries

Spain, Australia

Related Organizations

Spanish National Research Council
Spain
Australian National University
Australia
Sophia University
Japan
Flinders University
Australia
Flinders University
Australia

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Keywords

Carbon compounds, Rotation, Elastic electron scattering, Experimental measurements, First Born approximation, Physics, Impact energy, Keywords: Absolute differential cross sections, Electron impact excitation, Energy regions, 541, Comparative studies, Polar molecules, Additivity rules, Carbonyl sulphides, Integrated elastic

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