SMALL-ANGLE X-RAY SCATTERING ANALYSIS OF PARTICLE SIZE DISTRIBUTION OF ULTRAFINE POWDER(Ⅲ)

Dividing Distribution Function (DDF) method is one of the methods by which the particle size distribution of ultrafine powder can be evaluated from its small-angle X-ray scattering data. In this paper, the stability of the solution obtained from DDF method has been studied through optimizing the coefficient matrix, introducing a damping factor and a least square treatment. All the calculations were accomplished with a computer. It was shown that the average deviation of the size distribution obtained is not greater than the error of the scattering intensity measured as long as the corresponding requirements are met.