8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

P1.14Fri 911:10-14:00The single particle dynamics of liquid iodine in theSachs-Teller regimeMaria Grazia Izzo, 1 Alessandro Cunsolo, 2 Filippo Bencivenga, 2 Silvia Di Fonzo, 3Roberto Verbeni, 4 and Ramon Gimenez De Lorenzo 51 Chalmers University of Technology, SE-412 96, SE-41296, Göteborg, Sweden2 Brookhaven National Laboratory, National Synchrotron Light Source II, New York,United States of America3 Sincrotrone Trieste, Basovizza, Trieste, Italy4 European Synchrotron Radiation Facility, Grenoble Cedex, France5 Universitat dell’Aquila, L’Aquila, ItalyWe employed deep inelastic x-ray scattering (DIXS) to achieve the first measurements of the spectrallineshape of a diatomic homonuclear fluid (liquid iodine) in the Sachs-Teller (ST) regime [1].When probed at extremely short times and lengthscales, in fact, the dynamic behavior of diatomichomonuclear fluids experiences several partial Impulse Approximation (IA) regimes, dependingon how the probed energy range, E, compares to the translational energy of molecules, E t , tothe rotational (hν R ) and vibrational (hν v ) quanta: i) a translational IA (E t