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Electron impact dissociation of H2O: emission cross sections for OH*, OH+*, H*, and H2O+* fragments

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

The optical emission spectrum in the near ultraviolet and visible following electron impact on H2O was studied in a crossed-beam and a static gas-target experiment. Emissions of H*, OH*, OH+*, and H2O+* fragments were detected and absolute emission cross sections for the different fragments were determined. A nonthermal rotational population was observed for the diatomic fragments which gives insight into the dissociation process. Further conclusions on the dissociation mechanism are possible based on appearance potentials and the shape of the emission cross sections as a function of impact energy.

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Author notes

  1. U. Müller

    Present address: Fakultät für Physik, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Strasse 3, W-7800, Freiburg, FRG

Authors and Affiliations

  1. Universität des Saarlandes, FB Experimentalphysik, W-6600, Saarbrücken, Federal Republic of Germany

    U. Müller, Th. Bubel & G. Schulz

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  2. Th. Bubel
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Müller, U., Bubel, T. & Schulz, G. Electron impact dissociation of H2O: emission cross sections for OH*, OH+*, H*, and H2O+* fragments. Z Phys D - Atoms, Molecules and Clusters 25, 167–174 (1993). https://doi.org/10.1007/BF01450171

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  • DOI: https://doi.org/10.1007/BF01450171

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