Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 10: INTERNAL SYMPOSIUM Scattering Experiments I
CPP 10.9: Vortrag
Dienstag, 27. März 2007, 12:15–12:30, H37
Mapping the local nanostructure inside a specimen by tomographic small-angle x-ray scattering — •Jan M. Feldkamp1, Christian G. Schroer1, Marion Kuhlmann2, Stephan V. Roth2, Rainer Gehrke2, Norbert Stribeck3, Armando Almendarez-Camarillo3, and Bruno Lengeler4 — 1Institute for Structural Physics, Dresden University, D-01062 Dresden, Germany — 2HASYLAB at DESY, Notkestr. 85, D-22607 Hamburg, Germany — 3Institute of Technical and Molecular Chemistry, Hamburg University, Bundesstrasse 45, D-20146 Hamburg, Germany — 4II. Physikalisches Institut, Aachen University, D-52056 Aachen, Germany
Small-angle x-ray scattering is combined with scanning microtomography to reconstruct the small-angle diffraction pattern in the direction of the tomographic rotation axis at each location on a virtual section through a specimen. These data yield information about the volume-resolved local nanoscale structure of the sample. With rotational symmetry present in the diffraction patterns, e.g., for isotropic or fiber-textured local nanostructure, the full reciprocal space information in the small-angle scattering regime can be reconstructed at each location inside the specimen. The resolution in real space is determined by the size of the x-ray beam. The experiments were performed with the microbeam option at HASYLAB beamline BW4.
Using this new method, we prove the existence of a skin-core structure in injection molded samples, which cannot be detected in classical tomography.