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
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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
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 20343
- DOI 10.1103/PhysRevA.82.010701
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301678
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