激发态
亚稳态
离解(化学)
动能
原子物理学
化学
激发
氩
分枝分数
分子
光解
人口
分子束
支化(高分子化学)
光化学
物理
物理化学
人口学
有机化学
量子力学
社会学
作者
Jean-Philippe Leblond,F. Collier,F. Hoffbeck,P. Cottin
摘要
Dissociation of the H2O molecule by collisions with metastable argon (3P2) was shown a few years ago to lead to the excitation of the first vibrational levels of A 2Σ+ excited state of OH. The present work consists of a detailed kinetic study of an e-beam excited Ar–H2O mixture to evaluate the potential interest of that reaction scheme for laser applications. In this study, we have mainly shown that OH* (A 2Σ+) is populated by an Ar++H2O pathway too and we give an estimate for the OH* (A 2Σ+) and OH (X 2Π) formation branching ratios. We have also estimated that Ar*2+H2O is a minor OH* pathway. These results and measurements of main reaction rates permitted us to give a kinetic model where the predicted time dependence of population are in good agreement with the experimental result. The feasibility of a radical laser based on the collisional dissociation scheme of molecules is discussed.
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