Na_2(A^1∑_u^+,v=8～b^3∏_(0u),v=14)-Na体系转动传能的碰撞量子干涉效应(英文)

Collisional quantum interference effect on rotational energy transfer in Na_2(A^1∑_u^+,v=8～b^3∏_(0u),v=14)-Na system

沙国河及其工作组于1995年发表了COA1∏(v=0)～e3∑-(v=1)与He,Ne及其它碰撞伴的碰撞过程中转动传能的碰撞量子干涉现象,并得到了积分干涉角,陈等从理论和实验上发现了Na2(A1∑u+,v=8～b3∏0u,v=14)体系与Na(3s)碰撞的碰撞量子干涉现象,孙等计算了其积分干涉角,但是对微分干涉角没有过多的计算.本文作为对原子-双原子体系碰撞诱导转动传能的进一步理论研究,在含时一级波恩近似的基础上考虑各向异性相互作用势和长程相互作用势,计算了单叁混合态的Na2(A1∑u+,v=8～b3∏0u,v=14)体系与Na碰撞的微分干涉角,并得到了微分干涉角与碰撞参数的关系,此理论模型对理解和进行分子束实验是非常重要的.

Sha and co-workers reported the evidence for Collisional quantum interference（CQI） on rotational energy transfer in the CO A^1∏（v=0）～e^3∑^-（v=1） system in collision with He,Ne and other partners in 1995 and had measured the integral interference angles.Chen et al.observed the COI in Na2（A^1∑u^＋,v=8～b^3∏0u,v=14） system in collision with Na（3s） experimentally and theoretically,Sun et al measured the integral interference angles.But the differential interference angles are not measured much.In this paper,as a further theoretical study of the collision-induced quantum interference on rotational energy transfer in an atom-diatom system,based on the first-Born approximation of time-dependent perturbation theory,taking into account the anisotropic Lennard-Jones interaction potential and the long-range interaction potential,the differential interference angles for singlet-triplet mixed states of Na2（A^1∑u^＋,v=8～b^3∏0u,v=14） system in collision with Na were calculated theoretically.The relationships of differential interference angle versus impact parameter including collision parameter,velocity,are obtained.This theoretical model is important to understand or perform the experiment in the molecular beam.