Capture dissociation of H2+ in rare gases and small hydrocarbons

Jonathan, P. and Lee, A.R. and Brenton, A.G. and Beynon, J.H. (1987) Capture dissociation of H2+ in rare gases and small hydrocarbons. International Journal of Mass Spectrometry and Ion Processes, 79 (1). pp. 101-113. ISSN 0168-1176

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Translational energy spectroscopy of H+ and H− ions, produced by the two-collision capture-dissociation of 6 keV H2+ with rare gas (He, Ne, Ar, Kr) and small hydrocarbon [CH4, C2H6, C3H8, C2H4, C3H6, C4H8 (but-2-ene)] targets, is performed. The first collision involves single-electron capture by H2+ into some stable or metastable state H2*; the efficiency of this process is strongly dependent on the number of available target gas valence electrons. Proof of the formation of electronically excited H2* is presented. The second collision step involves dissociation of H2* to H+ and/or H− via either dissociative re-ionisation, dissociative capture, or ion pair formation. Measured translational energy release distributions and relative cross-sections for ionic fragment formation are consistent with the proposed capture-dissociation mechanisms.

Item Type: Journal Article
Journal or Publication Title: International Journal of Mass Spectrometry and Ion Processes
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/1600/1607
Departments: Faculty of Science and Technology > Mathematics and Statistics
ID Code: 133138
Deposited By: ep_importer_pure
Deposited On: 24 Apr 2019 08:35
Refereed?: Yes
Published?: Published
Last Modified: 30 Sep 2019 21:54

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