CN(X^2Π)分子系统碰撞诱导转动传能实验的理论解释(英文)

Theoretical interpretation of the experiment on collision-induced rotational energy transfer in CN(X^2Π) system

在以前的研究中,已经对Λ分裂引起的CN(X2Π)与惰性气体碰撞诱导转动传能中的量子干涉效应进行了研究.在此基础之上,本文讨论了在洪德情况(a)2Π电子态下,微分干涉角.在含时一级波恩近似下,考虑各向异性相互作用势,以及影响干涉角的各个因素(实验温度、碰撞伴、转动量子数等),定量计算了原子-双原子分子系统的微分干涉角.研究了影响微分干涉角的各个因素,讨论了微分干涉角随碰撞伴及速度的变化趋势.

In our previous experimental studies, quantum interference on collision-induced rotational energy transfer of CN（X^2Π） with inert gases, which originates from the difference between the two -related collision potential energy surfaces, is reported. For the electronic state in the Hund’s case （a）, degree of the differential interference is discussed in this paper. Based on the time dependent first order Born approximation, taking into accounts the anisotropic Lennard-Jones interaction potentials, the factors （experimental temperature, partner and rotational quantum number） that the interference angle depends on are obtained. The differential interference angle of [case（a）]atom-diatomic molecules system, which measures the degree of coherence, is calculated quantitatively. Several factors that the differential interference angle depends on are investigated. The changing tendencies of the differential interference angle with the impact parameter and relative velocity are discussed.