电子与复杂分子散射的可加性规则研究  

The theory of Additivity Rule about electrons scattering on complex molecules

作　　者：商继敏[1] 王如梅[1] 贾永[1] 孙金锋[2] 

机构地区：[1]郑州轻工业学院技术物理系,郑州450000 [2]河南师范大学物理与信息工程学院,新乡453002

出　　处：《原子与分子物理学报》2004年第4期667-670,共4页Journal of Atomic and Molecular Physics

摘　　要：独立原于模型IAM(Independent Atomic Model)和可加性规则AR(Additivity Rule)是一个很好的适用于电子与分子中高能正碰撞的有效方法。但是现用的AR对于电子与分子散射的截面计算明显高估了实际值。本文通过从分子的外部特征出发,考虑到屏蔽效应与分子本身的特征和入射电子能量的关系,在GAR和EGAR模型的基础上提出新的EGAR模型,在新的EGAR模型中分子的特点得以体现,可使可加性规则更合理地运用于中高能区的电子-分子散射。The independent atomic model (IAM) together with partial waves and the additivity rule have been used to study the electron molecule scattering at intermediate and high energies. But IAM neglects the multiple scattering and assumes that the consistent atoms in molecule were free and the interactions were not important. so the LAM and the additivity rule's results on some complex molecules show large discrepancies than simple and small molecules at the same incident energies. In this paper, we research the additivity rule from the outer nature of the molecules. Considering the shielding effect in molecules from the relations to molecular properties and the energy of incident electrons, We present a new energy geometry additivity rule model. It yields better agreement in the intermediate and high-energy region.

关 键 词：可加性规则 EGAE模型 屏蔽效应 

分 类 号：O561.5[理学—原子与分子物理]