Medium perturbations of atomic extravalence excitations
| Autor: | Itzhak Messing, Joshua Jortner, Baruch Raz |
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| Rok vydání: | 1977 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 66:2239-2251 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.434284 |
| Popis: | In this paper we present the results of an experimental study of the lowest 1S0→3P1 extravalence electronic excitation of atomic xenon in dense supercritical and subcritical fluid argon over the density range 0.1–1.4 g⋅cm−3, spanning the temperature region 80–300°K. Solvent perturbations were characterized in terms of the spectral shift, the linewidth and the first and the second moments of the absorption band. These energetic parameters exhibit a weak temperature sensitivity and a strong density dependence. The experimental data were analyzed in terms of the semiclassical theory of line broadening extended to account for guest–host and host–host correlations and incorporating realistic pair potentials in the ground and in the excited electronic states. The semiclassical theory results in manageable expressions for the first and for the second moments of the absorption band which are expressed in terms of a difference guest–host interaction potential together with the solute–solvent and the solvent–solven... |
| Databáze: | OpenAIRE |
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