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首页> 外文期刊>Journal of Colloid and Interface Science >Multiple Light Scattering by Spherical Particle Systems and Its Dependence on Concentration: A T-Matrix Study
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Multiple Light Scattering by Spherical Particle Systems and Its Dependence on Concentration: A T-Matrix Study

机译:球形粒子系统的多次光散射及其与浓度的关系:T矩阵研究

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摘要

The T-matrix method has been used to calculate scattering cross-sections of two spherical particles close to each other. By comparing our results with those expected for infinite distance, we can determine the maximum distance required to produce interparticle light-scattering interactions. As a result, we can determine the degree of dilution needed in a particle suspension to remain within the single-scattering approximation. Cross sections have been calculated for a relative refractive index m = 1.2 and a range of particle sizes and separations. Since the approach in this paper assumes double scattering as the first mechanism for beginning multiple scattering, our results will be compared with those arising from the condition that the optical depth is less than unity, #tau#- < 1. It is shown that this condition, widely used in transfer theory, is more restrictive than ours except for the smallest particles, where double scattering becomes the main agent for multiple scattering.
机译:T矩阵方法已用于计算彼此靠近的两个球形粒子的散射截面。通过将我们的结果与无限距离的预期结果进行比较,我们可以确定产生粒子间光散射相互作用所需的最大距离。结果,我们可以确定保留在单散射近似值内的颗粒悬浮液所需的稀释度。已计算出相对折射率m = 1.2以及各种粒径和分离范围的横截面。由于本文中的方法将双重散射作为开始多重散射的第一种机制,因此我们的结果将与光学深度小于1的条件下得到的结果进行比较,#tau#-<1。转移理论中广泛使用的条件比我们的条件更具限制性,除了最小的粒子,其中双重散射成为多重散射的主要因素。

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