Cross-sections for rotational excitations of C3H4 isomers by electron impact

  • A. R. Lopes
  • M. H.F. Bettega
  • M.T. do N. Varella
  • M. A.P. LimaEmail author
Atomic and Molecular Collisions


We report elastic (rotationally summed) and rotationally resolved cross-sections for scattering of low-energy electrons by the C3H4 isomers allene, propyne, and cyclopropene, which belong to the D2d, C3v, and C2v groups, respectively. We employed the Schwinger multichannel method with pseudopotentials at the static-exchange approximation, combined with the adiabatic-nuclei-rotation (ANR) approximation to calculate the rotational excitation cross-sections for energies ranging from 5 to 30 eV. Our rotational resolved cross-sections show the isomer effect more strongly related to scattering potentials of different molecular geometries and to transition selection rules than to differences in mass distribution which account for the energy spacing in the rotational spectra of the molecules.


Mass Distribution Electron Impact Cyclopropene Quantum Computing Selection Rule 
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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • A. R. Lopes
    • 1
  • M. H.F. Bettega
    • 2
  • M.T. do N. Varella
    • 1
  • M. A.P. Lima
    • 1
    Email author
  1. 1.Instituto de Física “Gleb Wataghin”, Universidade Estadual de CampinasCampinasBrazil
  2. 2.Departamento de FísicaUniversidade Federal do ParanáCuritibaBrazil

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