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O- ESD from O2 monolayers physisorbed on graphite: a surface mediated mechanism

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

We report on electron-stimulated desorption (ESD) of O- ions from δ phase O2 physisorbed on graphite. A production of energetic O- ions is observed with an onset at about 13 eV. The measured onset of the yield of O+ ions is however found at about 20 eV. O- ions yields obtained at different ion kinetic energies and kinetic energy (KE) measurements lead us to postulate a substrate mediated ESD mechanism following direct electronic excitation of physisorbed O2.

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Authors and Affiliations

  1. Laboratoire des Collisions Atomiques et Moléculaires, Université de Paris-Sud, Bâtiment 351, F-91405, Orsay, France

    K. B. K. Tang, R. Azria & Y. Le Coat

  2. Cavendish Laboratory, University of Cambridge, Cambridge, CB3 2TT, UK

    K. B. K. Tang, R. Azria, Y. Le Coat, M. Tronc & R. E. Palmer

  3. Nanoscale Physics Research Laboratory, School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

    K. B. K. Tang & R. E. Palmer

  4. Laboratoire de Chimie Physique, Université Pierre et Marie Curie, 11 rue Pierre et Marie Curie, F-75231, Paris Cedex 05, France

    M. Tronc

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  1. K. B. K. Tang
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  2. R. Azria
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  3. Y. Le Coat
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  4. M. Tronc
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Unité de Recherche associée au CNRS, URA 0281

Unité de Recherche associée au CNRS, URA 0176

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Tang, K.B.K., Azria, R., Le Coat, Y. et al. O- ESD from O2 monolayers physisorbed on graphite: a surface mediated mechanism. Z Phys D - Atoms, Molecules and Clusters 38, 41–44 (1996). https://doi.org/10.1007/s004600050061

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  • DOI: https://doi.org/10.1007/s004600050061

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