含核椭球粒子后向散射特性研究

Study on Light Backscattering by Spheroid with Inclusion

基于T矩阵方法,给出了随机取向、轴对称、含核椭球粒子的散射计算方法,散射体的核和外壳均可为非球形粒子,内层粒子和外层粒子可以为同心也可为不同心,整个粒子具有轴对称性。以含核椭球粒子为模型,计算了含有吸收性内核的水凝物气溶胶的散射特性,分析了核的大小、形状以及位置对后向散射的影响。计算结果表明,后向散射对内核的形状、大小、位置以及外壳的形状非常敏感。

A method is described for the calculation of light-scattering properties of randomly oriented, axially symmetric spheroid particles with inclusion, in the framework of the T-matrix theory. Both the core and the shell can be axially symmetric nonspherical particles, and the inner and outer layers can be concentric or eccentric. Based on the model of spheroid particle with inclusion, light scattering characteristics of water aerosols with an absorptive core are calculated. The effects of core size, shape and position on the light backscattering characteristics are analyzed. It is suggested that light scattering properties in the backscattering region are sensitive to the shape, size, position of the core and the shape of the shell.