Factors affecting diffraction broadening analysis

摘要

The combined truncation-background level error, inherent in diffraction line profile analysis, has been calculated for several bell-shaped functions usually used in the refinement of diffraction pattern. The functions have been truncated at points where they fall to 1/100 of their maximum. It has been shown that, in line with qualitative facts known in literature, the error more affects the functions which are usually used to describe the crystallite size parameter than the ones used to describe the strain parameter. The steps and precautions, which are necessary in order to minimize the error, have been proposed through a simple example. The values of the size and strain parameters, obtained from integral breadths derived by the Stokes deconvolution, have been compared with those which have followed from the Warren treatment of broadening.