双原子分子-原子体系中的量子干涉效应

Quantum Interference Effect in Diatomic Molecule-Atom System

介绍了碰撞导致电子跃迁的模型，并解释了COA^｜｜（v=0）～e^3∑^-（v=1）系统与He原子碰撞的实验。提出了计算微分干涉角的方法，作为对原子-分子体系中碰撞诱导转动传能中量子干涉效应的进一步理论研究，建立了动力学模型。运用含时微扰的一级波恩近似理论，利用各向异性相互作用势和直线轨迹近似，计算了单三重混合态COA^1｜｜（v=0）～e^3∑^-（v=1）系统与He原子碰撞的微分干涉角，得到了分子束实验中微分干涉角随转动量子数变化的关系：随着转动量子数J值的增加，微分干涉角不断增加，并对其进行了仔细分析。

The model induced by collision in electron transition was introduced. The experiments on the system COA^1 ｜｜ （ v = 0）-- e^3∑^- （ v = 1 ） in collision with He were interpreted. A method of calculating the differential interference angle theoretically was presented. As a further theoretical study of the collision - induced quantum interference on rotational energy transfer in an atommolecule system, a dynamic model was described. Based on the first order Born approximation of the time dependent perturbation theory, taking into account the anisotropic interaction potential and the ＂straight - line＂ trajectory approximation, the differential interference angle on the system COA^1 ｜｜ （ v = 0）- e^3∑^- （ v = 1 ） in collision with He was calculated. The relationships between quantum interference effect and rotational quantum number of collision induced on rotational energy transfer in molecule beam experiment were obtained. The differential interference angles increased with the increasing of rotational quantum number J, and the reason was analyzed.