Vector correlations in the 355 nm photolysis of thermal NO2
Vector correlations in the 355 nm photolysis of thermal NO2
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DOI：
10.1039/a907955f
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发表时间：
2000-01-01
影响因子：
3.3
通讯作者：
Summerdeld, D
中科院分区：
文献类型：
--
作者：
Baker, RP;Costen, ML;Summerdeld, D
NO2 跃迁矩 mu、碎片速度 nu 和 NO 旋转角动量 J 之间的相关性已针对四个 NO(upsilon = 0, J) 状态进行了研究，这些状态跨越了 298 K 下 NO2 样品在 355 nm 处光解形成的最密集的旋转能级。与较低温度下的相关性相比，涉及 mu 的相关性明显降低，特别是平移各向异性因子 beta 减少约 1 倍。 2. 与速度无关的 beta = 0.7 值描述了在这些条件下形成的快速 O(P-3) 原子，并且可用于分析通过“photoloc”技术研究其与 H2S 反应时测得的多普勒分布。在 upsilon = 0 中测得的旋转分布显示出与相空间理论的一些偏差，特别是在高 J 时。
Correlations between the NO2 transition moment mu, the fragment velocities nu and the NO rotational angular momentum J have been made for four NO(upsilon = 0, J) states which span the most populated rotational levels formed by photolysis at 355 nm of a sample of NO2 at 298 K. Correlations involving mu are seen to be decreased in comparison with those at lower temperatures, and in particular the translational anisotropy factor beta is reduced by a factor of ca. 2. A speed independent value of beta = 0.7 is shown to describe the fast O(P-3) atoms formed under these conditions and can be used in the analysis of the Doppler profiles measured in studies of their reactions with H2S by means of the "photoloc'' technique. Measured rotational distributions in upsilon = 0 show some deviations from phase space theory, particularly at high J.