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Journal Article

Electron-Induced Synthesis of Ozone in a Dioxygen Matrix

MPS-Authors
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Lacombe,  S.
Fritz Haber Institute, Max Planck Society;

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Cemic,  F.
Fritz Haber Institute, Max Planck Society;

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Jacobi,  Karl
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevLett.79.1146.pdf
(Publisher version), 101KB

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Citation

Lacombe, S., Cemic, F., Jacobi, K., Hedhili, M. N., Le Coat, Y., Azria, R., et al. (1997). Electron-Induced Synthesis of Ozone in a Dioxygen Matrix. Physical Review Letters, 79(6), 1146-1149. doi:10.1103/PhysRevLett.79.1146.


Cite as: https://hdl.handle.net/21.11116/0000-0008-A1BC-E
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 (v3) and bending (v2) 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 O̊̇̑2̑
(c1Σu
-,C3Δu,A3Σu+
,B3Σu-) states is the main source of atomic oxygen O(3P) or O(1D) involved in the O3 synthesis.