Rotational product state distribution and alignment of associatively desorbing cuprous fluoride molecules
Rotational product state distribution and alignment of associatively desorbing cuprous fluoride molecules
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缔合解吸氟化亚铜分子的旋转产物态分布和排列
DOI：
10.1021/j100174a061
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
J. Wanner
中科院分区：
文献类型：
--
作者：
U. Naeher;A. Bracker;X. R. Chen;P. Jakob;J. Wanner
我们报告了 CuF 分子与 F2 分子束反应时从铜表面缔合解吸的旋转产物态分析。在相干饱和条件下记录了 X, 2+(d"= 0) 流形的激光诱导荧光光谱。旋转分布是非玻尔兹曼的，并且在 890 至 985 K 之间的表面温度下显示出调节因子为 0.8 的“旋转冷却效应”。初步偏振测量表明解吸分子的 J 轴优先平行排列 到表面法线。 CuF 缔合解吸中直升机运动的盛行与其他人的理论预测一致。
We report a rotational productstate analysis of CuF molecules associatively desorbing from copper surfaces in reaction with an F2 molecular beam. Laser-induced fluorescence spectra of the X, 2+(d"= 0) manifold were recorded under conditions of coherent saturation. The rotationaldistribution was non-Boltzmann and showed a “rotational cooling effect” with an accommodation factor of 0.8 for surface temperatures between 890 and 985 K. Preliminary polarizationmeasurements showed that the J axes of the desorbing molecules are preferentially aligned parallel to the surface normal. The prevalence of helicopter motion for the associative desorption of CuF agrees with theoretical predictions of others.