Quantitative Characterization of the Contrast Mechanisms of Ultra-Small Angle-X-Ray Scattering Imaging
F Zhang, Gabrielle G. Long, Lyle E. Levine, Jan Ilavsky, P R. Jemian
We offer a general treatment of X-ray imaging contrast for Ultra-Small Angle X-ray Scattering (USAXS) imaging that makes use of phase propagation and dynamic diffraction theory to account quantitatively for the intensity distribution in the detector plane. Simulated results from a model system of micro-sized spherical SiO2 particles embedded in a polypropylene matrix shows good agreement with experimental measurements. Simulations by means of a separate geometrical ray-tracing method also account for the features in the USAXS images and offer a complementary view of small angle X-ray scattering as a contrast mechanism. The ray-tracing analysis indicates the refraction, in the form of Porod scattering, and to a much lesser extent, X-ray reflection, account for USAS imaging contrast.
, Long, G.
, Levine, L.
, Ilavsky, J.
and Jemian, P.
Quantitative Characterization of the Contrast Mechanisms of Ultra-Small Angle-X-Ray Scattering Imaging, Journal of Applied Crystallography
(Accessed June 4, 2023)