TIT# A method for the combination of USAXS and SAXS patterns of fibers
AUT# Stribeck, N.; N”chel, U.
SOU# J. Appl. Cryst. (2008), ~, accepted
LOC# xv110
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ABS# A method for collimation correction and combination of
     anisotropic scattering patterns recorded in tandem experiments is
     proposed. It includes both an advanced two-dimensional (2D)
     extrapolation procedure for the center of the pattern, and
     (compared to the ``blind deconvolution'' method) a more justified
     procedure for desmearing from an unknown broad primary beam
     profile. This semi-blind deconvolution rests on the availability
     of unsmeared data in a region of the smeared image.
     Materials exhibiting both ultra-small-angle X-ray scattering
     (USAXS) and small-angle X-ray scattering (SAXS) must be studied
     in both angular bands (tandem experiment), in order to collect
     the complete discrete scattering for nanostructure analysis.
     Merging of the patterns requires desmearing of at least the SAXS
     pattern from its point-spread function, i.e. the primary beam
     profile. The distorting effect of single-band experiments on the
     reconstructed nanostructure of polymer materials is demonstrated.