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Electron-impact dissociation and ionization ofCN+ions

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Belic, D. S. Urbain, Xavier [UCL] Cherkani-Hassani, H. Defrance, Pierre [UCL]

Absolute cross sections are reported for electron-impact ionization and dissociation of CN+ ions. Simple ionization to CN2+ ions and formation of singly charged C+ and N+ and doubly charged C2+ and N2+ fragments have been investigated. The animated electron-ion crossed-beam method has been applied in the energy range from the respective reaction threshold sup to2.5keV.The maximum of the simple ionization cross section is found to be (5.37±0.14)×10−18 cm2 at115eV.The maximum total cross sections for N+ and C+ fragment production are found to be (22.2±2.7)×10−17 and(18.9±1.2)×10−17 cm2 at85eV,respectively.Byperformingcareful magnetic field scans of the collected ions, contributions of dissociative excitation and dissociative ionization to the C+ and N+ fragment production are determined separately. The cross sections for asymmetric dissociative ionization to C2+ and N2+ are found to be more than one order of magnitude smaller. The kinetic energy release distributions are determined for all dissociation processes at selected electron energies. These distributions, together with the energy thresholds, provide additional information about the ground and excited states of the molecular ion.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2017
Language Anglais
Journal information "Physical Review A" - Vol. 95, no.5, p. 052702-1 - 052702-11 (2017)
Peer reviewed yes
issn 2469-9926
e-issn 2469-9934
Publication status Publié
Affiliation UCL - SST/IMCN/NAPS - Nanoscopic Physics
Links
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Bibliographic reference Belic, D. S. ; Urbain, Xavier ; Cherkani-Hassani, H. ; Defrance, Pierre. Electron-impact dissociation and ionization ofCN+ions. In: Physical Review A, Vol. 95, no.5, p. 052702-1 - 052702-11 (2017)
Permanent URL http://hdl.handle.net/2078.1/185200