Analysis

Out-of-plane cuts

For the analysis of several scattering patterns it would be annoying and time consuming to simulate full 2D-patterns by assuming different models. By analyzing so called out-of-plane cuts along qy, it is possible to analyze the interference function S(qy) directly. After extrating the scattering curve I(qy) at a constant qz where the scattering has its maximum (normally at the Yoneda peak of the substrate), one can feed the information in a general SAXS-analysis software. In my examples I used the free software Scatter, written by S. Förster (University of Bayreuth).

For the form factor F instead, one has to taken the full DWBA into account to get the precise radius R(y) of the scatterer along the surface! But in a first approach it is possible to use the cylindrical form factor for the caculation, as its intensity oszillation along qy is independent from qz and αi. The result of the radius out of the out-of-plane cut is already a good starting point for full analysis within the DWBA - herefore, specialized software like IsGISAXS is the right choice.