掺杂对随机取向团簇粒子辐射特性的影响  

Influence of Impurity on Radiative Properties of Randomly Oriented Cluster Agglomerates

作　　者：类成新[1] 冯东太[1] 吴振森[2] 

机构地区：[1]山东理工大学理学院,山东淄博255049 [2]西安电子科技大学理学院,西安710071

出　　处：《光子学报》2011年第7期1055-1060,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(No.60771038)资助

摘　　要：利用Bruggeman有效介质理论得到了占有不同体积份额杂质的团簇粒子的等效复折射率.采用离散偶极子近似方法对包含有不同化学成分的随机取向团簇粒子的散射相函数、消光、吸收、散射效率因子、单次散射反照率以及不对称因子等辐射特性参量进行了数值计算,深入探讨了掺杂量对随机取向团簇粒子辐射特性的影响.研究表明,掺杂对随机取向团簇粒子的辐射特性产生显著的影响,并且此影响随着粒子尺度参量的变化而变化.这一工作对研究多种化学成分组成的混合气溶胶的辐射及气候效应具有重要科学价值.The influence of impurity on the radiative properties of randomly oriented cluster agglomerates was mainly analyzed.The equivalent complex refractive index of aerosols containing different volume fractions of amorphous carbon was obtained by Bruggeman effective medium theory.The radiative characteristic quantities were calculated based on the discrete dipole approximation method,such as the phase function,extinction,absorption and scattering efficiency factor,single-scattering albedo and asymmetrical parameter of randomly oriented cluster agglomerates.The influence of the impurity on the radiative properties of randomly oriented cluster agglomerates was mainly discussed.The results indicate that the influence of the impurity on the radiative properties of randomly oriented cluster agglomerates is obvious,and it varies with the size parameters of the randomly distributed cluster agglomerates.This work is important for the study of radiative characteristics of aerosols with a mixture of various chemical compositions and their climatic effects.

关 键 词：团簇粒子 辐射特性 Bruggeman有效介质理论 离散偶极子近似方法 

分 类 号：P422.3[天文地球—大气科学及气象学]