Transient structures of crystals and liquids: an x-ray diffraction and EXAFS study

Ivan V. Tomov; Jie Chen; Hua Zhang; Peter M. Rentzepis

doi:10.1117/12.583260

17 March 2005 Transient structures of crystals and liquids: an x-ray diffraction and EXAFS study

Ivan V. Tomov, Jie Chen, Hua Zhang, Peter M. Rentzepis

Proceedings Volume 5580, 26th International Congress on High-Speed Photography and Photonics; (2005) https://doi.org/10.1117/12.583260
Event: 26th International Congress on High-Speed Photography and Photonics, 2004, Alexandria, Virginia, United States

Abstract

CBr₄ in solution was excited with 266nm picosecond pulses and the spectra and kinetics of the excited states, intermediate and final products were recorded. A long lived CBr₄ dissociation transient characterized by a broad absorption band with a maximum at 480 nm was found to be a solvent stabilized ion pair, (CBr,⁺ // Br^-)_solv. EXAFS experiments reveal the structure of CBr₄ and the final dissociation products in solution. Time resolved EXAFS studies are performed to detect and determine the structure of the dissociation intermediates as a function of time, with a resolution of a few picoseconds and 0.02 A. Transient lattice structures have been observed in metalic nano-crystals after been heated with pulsed laser excitation. The distortion of the lattice of Au (111) 150 nm thick film as a function of time after excitation has been measured.

Citation Download Citation

Ivan V. Tomov, Jie Chen, Hua Zhang, and Peter M. Rentzepis "Transient structures of crystals and liquids: an x-ray diffraction and EXAFS study", Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); https://doi.org/10.1117/12.583260

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