Absolute cross sections for dissociative electron attachment to HCN and DCN

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.010701· OSTI ID:21440439

May, O; Kubala, D; Allan, M ^[1]

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1. Department of Chemistry, University of Fribourg, Chemin du Musee 9, CH-1700 Fribourg (Switzerland)

Absolute partial cross sections for the formation of CN{sup -} 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 940pm{sup 2} for CN{sup -}/HCN and 340pm{sup 2} for CN{sup -}/DCN at peaks of the bands due to the {sup 2{Pi}}-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{sup -}, from which the branching ratios could be determined to be 1,0.49, and 0.22 for the formation of CN{sup -} 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)].

• OSTI ID: 21440439
• Journal Information: Physical Review. A, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevA.82.010701; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BRANCHING RATIO
CROSS SECTIONS
CYANIDES
DEUTERIUM COMPOUNDS
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRONIC STRUCTURE
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
EV RANGE
HYDROCYANIC ACID
RESONANCE
THRESHOLD ENERGY
TIME-OF-FLIGHT METHOD
VIBRATIONAL STATES
COLLISIONS
DIMENSIONLESS NUMBERS
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
FERMIONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INORGANIC COMPOUNDS
LEPTONS
MOLECULE COLLISIONS