Electron-induced synthesis of ozone in a dioxygen matrix

S. Lacombe, F. Cemic, K. Jacobi, Mohamed Nejib Hedhili, Y. Le Coat, R. Azria, M. Tronc

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    54 Scopus citations

    Abstract

    Ozone (O3) was synthesized in the condensed phase induced by electron bombardment of multilayer films of molecular oxygen condensed at temperatures below 30 K on metal surfaces. O3 formation was demonstrated by the observation of the asymmetric stretching (ν3) and bending (ν2) normal modes of vibration in a high-resolution electron energy-loss spectroscopy experiment, and by characteristic changes in electron-stimulated desorption of O-. The threshold electron energy for the O3 formation is found at 3.5+/-0.2 eV. It corresponds to the formation of O(3P) associated with O-\(2P\) by dissociative electron attachment at condensed O2, followed by the third body reaction O+O2+O2→O3+O2. Above 5.1 eV bombarding energy, dissociative excitation of the O*2 (c1Σ-u, C3Δu, A3Σ+u, B3Σ-u) states is the main source of atomic oxygen O(3P) or O(1D) involved in the O3 synthesis.

    Original languageEnglish (US)
    Pages (from-to)1146-1149
    Number of pages4
    JournalPhysical Review Letters
    Volume79
    Issue number6
    DOIs
    StatePublished - Jan 1 1997

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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