Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.35: Poster

Dienstag, 8. März 2005, 16:30–18:30, Poster TU D

Energy Dispersive Small Angle X-Ray Scattering — •Tushar Sant, Wolfram Leitenberger, Tobias Panzner, and Ullrich Pietsch — Institute of Physics, University of Potsdam, Am Neuen Palais 10, D-14469 Potsdam, Germany.

Small Angle X-ray Scattering is well known technique for characterizing polymers, colloids and biological samples. The characterization is usually done with angular-dispersive set-ups. We are developing the energy dispersive SAXS set-up with the incident synchrotron beam in the range 4<E<30KeV at BESSY bending magnet beamline. We recorded the whole diffracted energy spectrum at a fixed angular position of the detector. The feasibility of energy dispersive technique was already proved by our group in the fields like Grazing incidence diffraction and X-ray reflectivity. We used a silicon drifted diode detector with energy resolution of about 250 eV. We investigated the similarity between angular dispersive and energy dispersive techniques on several samples. The main advantage of such a set up is that the whole spectrum appears simultaneously and it can be used for the analysis of the sample on a time scale of minutes. On the other hand, this also requires the exact knowledge of the background and energy dependent absorption properties of the system, which is also discussed.