| Autor: |
Anton Plech, Rodolphe Vuilleumier, Savo Bratos, F. Mirloup, Michael Wulff |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Chemical Physics. 304:245-251 |
| ISSN: |
0301-0104 |
| DOI: |
10.1016/j.chemphys.2004.06.065 |
| Popis: |
A recent theory of time-resolved X-ray diffraction is used to show how atomic motions in chemical reactions can be monitored. Only quasi-static reactions which evolve slowly as compared to the time scale of laser excitation are considered. The general expression for the X-ray signal is expressed in terms of temporally varying pair distribution functions, and a procedure is described to extract them from time resolved X-ray experiments. The density changes induced by laser heating are also included into the theory, and their signature is discussed. New experimental results concerning the I 2 /CCl 4 solution are reported. The recombination of the laser-dissociated iodine is monitored at pico- and nanosecond time scales. The CCl 4 molecules take part of the reaction; the solvent thus appears as a reaction partner rather then an inert medium hosting it. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect