Luminescence during oxygen adsorption on thorium oxide
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Faraday Discussions of the Chemical Society
- Vol. 58, 205-214
- https://doi.org/10.1039/dc9745800205
Abstract
Some novel features concerning the light emitted during oxygen adsorption on thorium oxide surfaces are presented and discussed. The variation of light intensity with time reveals the existence, after the initial peak, of a secondary maximum depending on the conditions of the previous surface treatment with hydrogen. Carbon monoxide added to the oxygen causes this secondary maximum to vanish. Finally, the spectrum of emitted light consists, in the visible region, of a broad structureless band, between about 500 and 800 nm. These findings are interpreted as due to the possible occurrence of two radiative transitions between adsorbed species: O2ads+ e–→ O2ads –, Oads+ e–→ Oads –.Keywords
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