The gas-phase reactions M + O2(X 3Σâg), M + O2(a 1Îg) and M + O(3P) have been studied with chemielectron spectroscopy, where M represents one of the lanthanide metals, cerium or lanthanum. Assignment of the observed bands has been assisted by mass analysis of the ions produced and by approximate kinetic modelling calculations. For the M + O2(X 3Σâg) and M + O2(a 1Îg) associative ionization reactions, most of the excess energy appears as electron kinetic energy, whereas for the M + O(3P) reactions a larger fraction of the reaction energy is retained in the positive ion.
我们利用
化学电子能谱对气相反应 M + O2(X 3δg)、M + O2(a 1δg)和 M + O(3P)进行了研究,其中 M 代表
镧系元素
铈或
镧。通过对产生的离子进行质量分析和近似动力学模型计算,对观察到的波段进行了归类。对于 M + O2(X 3δâg)和 M + O2(a 1δg)的缔合电离反应,大部分过剩能量以电子动能的形式出现,而对于 M + O(3P)反应,较大部分的反应能量保留在正离子中。