HCl诱导CO碰撞传能中的微分干涉相位角

Differential interference angle in energy transfer of CO induced by HCl

CO(A_1Π,v=0-e^3Σ-,v=1)-HCl体系中的碰撞诱导量子干涉效应已经在静态池中被观测到,且测量到的干涉相位角分别是101°(J=12)和110°(J=13),此结果实际上是对各种可能碰撞参数和碰撞能量的加权平均.为探知被积分效应掩盖的动力学信息,分析微分干涉相位角对于碰撞参数(b)和碰撞相对速度(v)的依赖关系.结果表明,对物理上有意义的b和v,CO-HCl体系的微分干涉相位角分布在93°～116°范围,都是大于90°的钝角,说明不存在正干涉和负干涉相互抵消的问题,平均效应不严重.

That collision induced quantum interference effects was demonstrated in gas cell experiments within CO （ A^1∏, v = 0 - e^3 ∑^ - , v = 1 ） -HCl system. The interference phase angles were measured to be 1 01 ＋ 3 ° and 110 ＋ 5 ° for CO rotation quantum number J = 12 and J = 13, respectively, where the interference angle represents some ＂average＂ effect for collisions with different impact parameter b and collision velocity v. In order to understand the dynamics information covered by the average effects, the relationship of differential interference phase angle θ^DST on b and v was analyzed. The results indicate that within reasonable scope of b and v,θ^DST is in the range of 93°- 116° for the system CO-HCl. The fact that θ^DST is always greater than 90° shows that there is no cancellation between positive and negative interferences and the ＂levelling effect＂ is not serious.