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- W2005251334 abstract "We have investigated the vacuum ultra-violet photodissociation of molecular O2 physisorbed on graphite using synchrotron radiation with photon energies in the range 13-35 eV. The yield of desorbed O+ ions shows a threshold at approximately 19.5 eV and resonances at 24.5 eV and 28.5 eV, contrasting strongly with the gas phase photodissociation cross section. The principal mechanism of O+ production appears to be dipolar dissociation driven by photoelectrons generated in the substrate. An enhancement in the detection efficiency of low-energy ions, compared with previous measurements, has identified an additional dissociation mechanism leading to the desorption of O- ions. Specifically, the results support a channel for low-energy O- desorption, attributed to the dissociative attachment of photoelectrons, again generated in the graphite substrate, to the physisorbed O2 molecules." @default.
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- W2005251334 date "1994-03-07" @default.
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- W2005251334 title "Mechanistic studies of the photodissociation of physisorbed O<sub>2</sub>/graphite" @default.
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- W2005251334 doi "https://doi.org/10.1088/0953-8984/6/10/014" @default.
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