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30 August 2005 Ultrafast x-ray studies of structural dynamics at SLAC
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The melting dynamics of laser excited InSb have been studied with femtosecond x-ray diffraction. These measurements demonstrate that the initial stage of crystal disordering results from inertial motion on a laser softened potential energy surface. These inertial dynamics dominate for the first half picosecond following laser excitation, indicating that inter-atomic forces minimally influence atomic excursions from the equilibrium lattice positions, even for motions in excess of an Å. This also indicates that the atoms disorder initially without losing memory of their lattice reference.
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K. J. Gaffney, A. M. Lindenberg, J. Larsson, K. Sokolowski-Tinten, C. Blome, O. Synnergren, J. Sheppard, D. A. Reis, and J. B. Hastings "Ultrafast x-ray studies of structural dynamics at SLAC", Proc. SPIE 5917, Fourth Generation X-Ray Sources and Optics III, 59170D (30 August 2005);

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