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当原子或分子之间经历反应碰撞后,产物分子的转动角动量矢量相对于初始相对速度矢量具有较明显的取向。达一信息可从测量反应生成的激发态产物分子的化学发光偏振度P得到。Zare等首先研究了反应Ba(~1S)+N_2O产物的化学发光偏振;近期Jalink等利用六极电场将反应物分子取向,研究了反应Ba(~1S)+N_2O的化学发光偏振与不同碰撞方位的关系。本文研究了化学发光偏振度随Ba(~1S)束速度(即反应物相对平动能)的变化,根据产物转动角动量分布对反应物相对平动能的依赖关系得到了Ba(~1S)+N_2O反应的反应机理及势能面的新图象。
When an atom or molecule undergoes a reaction and collision, the momentum vector of the product molecule has a more obvious orientation relative to the initial relative velocity vector. A signal can be obtained from measuring the degree of polarization P of the chemiluminescence of excited-state product molecules generated by the reaction. Zare et al. First studied the chemiluminescence polarizations of Ba (~ 1S) + N 2 O reaction products. Recently, Jalink et al. Used a six-polar electric field to orient the reactants and studied the relationship between the chemiluminescence polarization of Ba (~ 1S) Relationship. In this paper, the change of the degree of polarization of Ba (~ 1S) with respect to the Ba (-1S) beam velocity (ie, the relative translational energy) of the chemiluminescence was studied. The dependence of the relative kinetic energy of the reactant on the angular momentum distribution of the product was obtained. Reaction mechanism of reaction and new image of potential energy surface.