Репозитарій ОНУ імені І.І.Мечникова

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Study of the Disperse Composition of Suspensions and Sputtered Substances by means of Small-Angle Light Scattering
(Одеський національний університет імені І. І. Мечникова, 2021) Bekshaiev, Oleksandr Yа.; Kontush, Serhii M.; Popov, Andrey Yu.; Rybak, S. S.; Бекшаєв, Олександр Янович; Контуш, Сергій Михайлович; Попов, Андрій Юрійович; Рибак, С. С.
Spatial distribution of the light scattered by a disperse system of particles depends on their sizes, shapes, positions, etc., which can be used for experimental determination of the parameters mentioned. For stochastic systems with the particles’ sizes exceeding the radiation wavelength, most of the scattered radiation concentrates near the incident beam axis. In this small-angle approximation, the scattering pattern is especially simple and regular, which enables to develop efficient procedures for the disperse system investigation. We describe the algorithm for determination of the mean particle radius in the system with lognormal distribution of the particle sizes and negligible multiple scattering. The algorithm’s performance is demonstrated on the practical example of the “fog” generated by a gasoline injector. The ways are discussed for further algorithm generalization and its extension to a non-parametric analysis of disperse systems with a priori unknown form of the particle sizes’ distribution.