https://doi.org/10.1140/epjd/e2005-00330-3
Cross-sections for rotational excitations of C3H4 isomers by electron impact
1
Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas, 13083-970 Campinas, SP, Brazil
2
Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-990 Curitiba, PR, Brazil
Corresponding author: a maplima@ifi.unicamp.br
Received:
21
September
2005
Revised:
31
October
2005
Published online:
13
December
2005
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.
PACS: 34.80.-i – Electron scattering / 34.80.Gs – Molecular excitation and ionization by electron impact / 34.80.Bm – Elastic scattering of electrons by atoms and molecules
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005