We report on an experimental investigation of the low-energy stereodynamics of the energy transfer reactions Ne(³P₂) + X, producing Ne(¹S) + X⁺ and [Ne–X]⁺ (X = N₂ or CO). Collision energies in the range 0.2 K–700 K are obtained by using the merged beam technique. Two kinds of product ions are generated by Penning and associative ionization, respectively. The intermediate product [Ne–X]⁺ in vibrationally excited states can predissociate into bare ions (X⁺). The experimental ratio of the NeX⁺ and X⁺ product ion yields is similar for both molecules at high collision energies but diverge at collision energies below 100 K. This difference is explained by the first excited electronic state of the product ions, which is accessible in the case of CO but lies too high in energy in the case of N₂.

中文翻译：

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Ne（3P2）+ N2，CO反应中低能立体动力学的研究。

我们报告了关于能量转移反应Ne（³ P ₂）+ X，产生Ne（¹ S）+ X ⁺和[Ne–X] ⁺（X = N ₂或CO）的低能立体动力学的实验研究。通过使用合并束技术，可以获得0.2 K–700 K范围内的碰撞能量。潘宁和缔合电离分别产生两种产物离子。处于振动激发态的中间产物[Ne–X] ⁺可以预离解成裸离子（X ⁺）。NeX ⁺和X ⁺的实验比例两个分子在高碰撞能量下的产物离子产率相似，但在低于100 K的碰撞能量下发散。这种差异可以通过产物离子的第一个激发电子态来解释，这在CO的情况下是可访问的，但能量太高在N ₂的情况下。