Interaction of low-energy electrons with dimethyl sulfide and dimethyl disulfide

J. S. dos Santos, F. Kossoski, and M. T. do N. Varella
Phys. Rev. A 90, 052713 – Published 14 November 2014

Abstract

We report elastic integral cross sections for low-energy electron scattering by gas-phase dimethyl sulfide and dimethyl disulfide, obtained with the Schwinger multichannel method with pseudopotentials. Our symmetry-resolved cross sections for dimethyl sulfide reveal that the single broad structure at 3.25eV observed in the electron transmission spectrum (assigned as a σCS* shape resonance) would actually arise from two superimposed anion states in the B2 and A1 symmetry components of the C2v point group. We also obtained two low-lying shape resonances for dimethyl disulfide, in good agreement with the available electron transmission data. In view of the recently reported measurements on dissociative electron attachment to dimethyl disulfide [C. Matias, A. Mauracher, P. Scheier, P. Limão-Vieira, and S. Denifl, Chem. Phys. Lett. 605-606, 71 (2014)], we also calculated cross sections for stretched S–S bond lengths, which indicate a fast stabilization consistent with the experimental data.

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  • Received 18 September 2014

DOI:https://doi.org/10.1103/PhysRevA.90.052713

©2014 American Physical Society

Authors & Affiliations

J. S. dos Santos1, F. Kossoski2, and M. T. do N. Varella2

  • 1Universidade Federal do ABC, Centro de Ciências Naturais e Humanas, CEP 09210-170 Santo André, São Paulo, Brazil
  • 2Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05314-970 São Paulo, São Paulo, Brazil

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Vol. 90, Iss. 5 — November 2014

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