Ionization yield and absorption spectra reveal superexcited Rydberg state relaxation processes in H2O and D2O
| Autor: | J. H. Fillion, Sydney Leach, Hans-Werner Jochims, S. Baouche, François Dulieu, J. L. Lemaire |
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| Rok vydání: | 2003 |
| Předmět: |
Physics
Absorption spectroscopy Absorption cross section Condensed Matter Physics Atomic and Molecular Physics and Optics symbols.namesake Autoionization Excited state Ionization Physics::Atomic and Molecular Clusters Rydberg formula symbols Relaxation (physics) Physics::Atomic Physics Atomic physics Rydberg state |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 36:2767-2776 |
| ISSN: | 1361-6455 0953-4075 |
| Popis: | The absorption cross section and the ionization quantum yield of H2O have been measured using a synchrotron radiation source between 9 and 22 eV. Comparison between the two curves highlights competition between relaxation processes for Rydberg states converging to the first A 2A 1 and to the second 2B 2 excited states of H2O+. Comparison with D2O absorption and ionization yields, derived from Katayama et al (1973 J. Chem. Phys. 59 4309), reveals specific energy-dependent deuteration effects on competitive predissociation and autoionization relaxation channels. Direct ionization was found to be only slightly affected by deuteration. |
| Databáze: | OpenAIRE |
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