Localized states in disordered mercury-xenon mixtures
- 1 February 1979
- journal article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 39 (2) , 99-109
- https://doi.org/10.1080/13642817908246341
Abstract
Optical absorption spectra in the energy range 2.0–5.5 eV have been obtained for thin films of Hg/Xe mixtures at 6 K in the concentration range X = 0.01–0.40 atomic fraction Hg. At low concentrations (X = 0.01–0.20) the films exhibit well-defined absorption peaks corresponding to trapped single Hg atoms and to Hg2 diatomic molecules. A gradual transition to continuous absorption extending to low energies, which is due to larger molecular clusters, is exhibited at higher (X ≥ 0.10) metal concentrations. Charge-transfer excitations of the clusters account for the low-energy absorption tails.Keywords
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