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
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
-
-
Classification
-
Chemistry
-
License
-
License undefined
-
Identifiers
-
-
Persistent URL
-
https://folia.unifr.ch/unifr/documents/301678
Statistics
Document views: 53
File downloads: