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本文简略地概述了在交叉分子束实验中研究Ba+N_2O反应所获得的结果。通过用光学多通道分析器观察这个反应的化学发光空间角分布及测定辐射态的寿命,通过在单次碰撞条件下测定出这个反应的带头明显可辨的化学发光光谱以及从Ba的~3D态原子与N_2O反应得到化学发光光子产率的增加等实验结果,说明了这个反应的化学发光来源于BaO的A~1∑~+和A′~1Ⅱ态的辐射。本文还采用反应通过生成离子对Ba+N_2O~-中间物再引发反应的假设,较为合理地解释了Ba(~3D)+N_2O反应的机理,并根据此模型用相空间统计理论计算了上述反应各电子态产物的分支比,得到与实验定性地吻合的结果。
This article gives a brief overview of the results obtained from the Ba + N_2O reaction in a crossed molecular beam experiment. By observing the angular distribution of the chemiluminescence of this reaction and measuring the lifetime of the radiation state with an optical multi-channel analyzer, the chemiluminescence spectrum of this reaction which is obviously discernible under a single collision and the ~ The experimental results of the increase of the photoluminescence yield of the chemiluminescence reaction between the atom and N_2O indicate that the chemiluminescence of this reaction is from the radiation of A ~ 1Σ ~ + and A ’~ 1Ⅱ of BaO. In this paper, we also use the assumption of re-initiation of Ba + N_2O ~ - intermediate by ion generation, and explain the mechanism of Ba (~ 3D) + N_2O reaction reasonably. Based on this model, the phase space statistics theory is used to calculate the above reaction The branching ratio of each electronic state product was qualitatively consistent with the experimental results.