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Proceedings Paper

Transient structures of crystals and liquids: an x-ray diffraction and EXAFS study
Author(s): Ivan V. Tomov; Jie Chen; Hua Zhang; Peter M. Rentzepis
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Paper 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.

Paper Details

Date Published: 17 March 2005
PDF: 15 pages
Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); doi: 10.1117/12.583260
Show Author Affiliations
Ivan V. Tomov, Univ. of California/Irvine (United States)
Jie Chen, Univ. of California/Irvine (United States)
Hua Zhang, Univ. of California/Irvine (United States)
Peter M. Rentzepis, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 5580:
26th International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; Stuart Kleinfelder; Donald R. Snyder; Brian J. Thompson, Editor(s)

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