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MECHANISTIC STUDIES OF THE PHOTODISSOCIATION OF PHYSISORBED O-2/GRAPHITE

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 nearly 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 drive by photoelectrons generated in the substrate. An enchancement ...

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Publication status:
Published

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Publisher copy:
10.1088/0953-8984/6/10/014

Authors


BENNETT, R More by this author
BENNETT, S More by this author
MACDONALD, M More by this author
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Journal:
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume:
6
Issue:
10
Pages:
1955-1964
Publication date:
1994-03-07
DOI:
EISSN:
1361-648X
ISSN:
0953-8984
URN:
uuid:09bdc33b-8ad9-4f88-930f-b35093e1a6e9
Source identifiers:
44446
Local pid:
pubs:44446
Language:
English

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