Real time XRD rocking curve data indicates a very interesting Nano structure in as-grown LiF crystal using the (113)- reflection ACT (asymmetric crystal topography).
What Nanostructural features would create the reciprocal space images observed in this data set?
Reciprocal space parameters including Bragg Peak Position (lattice dilatation), FWHM and "Integrated Breadth Squared" (Beta2, β2) have been mapped topographically for each detector pixel (27.5µm). Relative Lattice Dilatation Map: Bragg Peak position values are normalize w.r.t. the theoretical Bragg angle of 78.7301o (2θB) using the 0D rocking curve for the entire ROI (region of interest) shown in bright green in the real time topographic data attached below.
Relative Defect Density Map: β2, Integrated Breadth Squared Map was normalized assuming the minimum defect density at minimum β2 to be UNITY. Once we obtain a TEM sample from a desired area on the sample surface, it may then be possible to calibrate the β2 precisely w.r.t. the defect density observed by TEM.
Illustrated are a series of Bragg profiles at various locations on the sample surface showing the significant changes below the FWHM in each compared with the LEPTOS generated "INSTRUMENT PROFILE" .
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