Journal article

Absolute cross sections for dissociative electron attachment to HCN and DCN

  • May, Olivier Department of Chemistry, University of Fribourg, Switzerland
  • Kubala, D. Department of Chemistry, University of Fribourg, Switzerland
  • Allan, Michael Department of Chemistry, University of Fribourg, Switzerland
    26.07.2010
Published in:
  • Physical Review A. - 2010, vol. 82, p. 010701
English Absolute partial cross sections for the formation of CN⁻ in dissociative electron attachment to HCN and DCN have been measured using a time-of-flight ion spectrometer combined with a trochoidal electron monochromator to be 940pm² for CN⁻/HCN and 340pm² for CN⁻/DCN at peaks of the bands due to the ²Π-shape resonance. The dissociative electron attachment bands were then recorded under higher resolution, 60 meV, with a trochoidal monochromator plus quadrupole mass filter combination and found to have a nearly vertical onset at the threshold energy and to peak at 1.85 eV. Broad structure was observed on the bands, assigned to formation of vibrationally excited CN⁻, from which the branching ratios could be determined to be 1,0.49, and 0.22 for the formation of CN⁻ in the v=0,1, and 2 states, respectively. The results are compared to the recent multidimensional ab initio calculations of Chourou and Orel [Phys. Rev. A 80, 032709 (2009)].
Faculty
Faculté des sciences et de médecine
Department
Département de Chimie
Language
  • English
Classification
Chemistry
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301678
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