Formation and vibrational relaxation of OH (X 2Πi,v) by O2 and CO2
Formation and vibrational relaxation of OH (X 2Πi,v) by O2 and CO2
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O2 和 CO2 形成 OH (X 2πi,v) 并进行振动弛豫
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
W. Blumberg
中科院分区：
文献类型：
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作者：
J. Dodd;S. Lipson;W. Blumberg
测量并分析了时间分辨 OH(X 2Πi,v=1–9) 群体，以确定与形成机制和振动弛豫相关的参数。 OH(v) 在电子辐照的 Ar/H2/O3 混合物中形成，其中添加了 O2 或 CO2 作为弛豫剂。使用时间分辨傅立叶光谱观察 OH(v→v−1,v−2) 发射。然后拟合光谱来确定时间依赖性群体。使用单量子弛豫模型分析群体数据，但也考虑了多量子弛豫的可能影响。该模型包括在电子束终止后通过 H+O3→OH(v)+O2 生成 OH(v)，这对结果有显着影响。得到以下弛豫率常数：kv=1–6(O2)=1.3±0.4, 2.7±0.8, 5.2±1.5, 8.8±3.0, 17±7, 30±15 (10−13 cm3s−1) 和 kv=1–4(CO2)=1.8±0.5, 4.8±1.5, 14±5,分别为 28±10 (10−13 cm3s−1)。需要两个不同的指数衰减率来表征推断的 H 的时间依赖性......
Time‐resolved OH(X 2Πi,v=1–9) populations have been measured and analyzed to determine parameters relating to formation mechanisms and vibrational relaxation. OH(v) was formed in electron‐irradiated Ar/H2/O3 mixtures containing added O2 or CO2 as relaxer species. OH(v→v−1,v−2) emission was observed using time‐resolved Fourier spectroscopy. Spectra were then fit to determine time‐dependent populations. Population data were analyzed using a single‐quantum relaxation model, but the possible effects of multiquantum relaxation were also considered. The model includes provision for OH(v) production via H+O3→OH(v)+O2 after e‐beam termination, which has been found to have a significant effect on the results. The following relaxation rate constants are obtained: kv=1–6(O2)=1.3±0.4, 2.7±0.8, 5.2±1.5, 8.8±3.0, 17±7, 30±15 (10−13 cm3s−1) and kv=1–4(CO2)=1.8±0.5, 4.8±1.5, 14±5, 28±10 (10−13 cm3s−1), respectively. Two different exponential decay rates are necessary to characterize the time dependence of the inferred H ...