Optimization of data end points and taper width in extended absorption fine-structure analysis

The dependence of deduced interatomic spacing and inner potential on the lower and upper limits of integration, k₁ and k₂, as well as the taper width D, was studied for extended absorption fine structure using sinusoidal model data. The optimal values are achieved when 2(k₁+k₂)R or 2(k₂-k₁-D)R equals an odd half-integral multiple of π (rather than when 2k₁R and 2k₂R are integral multiples of π), where R is the spacing. Analytic approximations are used to elucidate numerical computations. Optimization of D is also discussed.