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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Imaging inelastic scattering of CO with argon: polarization dependent differential cross sections
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Imaging inelastic scattering of CO with argon: polarization dependent differential cross sections

机译：CO与氩气的成像非弹性散射：偏振依赖性差剖视图

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摘要

Rotationally inelastic scattering of carbon monoxide CO) with Argon at a collision energy of 700 cm(-1) has been investigated by measuring polarization dependent differential scattering cross sections PDDCSs) for rotationally excited CO molecules using a crossed molecular beam apparatus coupled with velocity-map ion imaging. A simple and robust 1 + 1' + 1 '') VUV Vacuum Ultra-Violet) REMPI Resonance Enhanced Multi Photon Ionization) scheme is used and images are obtained by setting the VUV light polarization direction parallel or perpendicular to the scattering plane. Clear differences between the images for the two polarizations are observed, indicating strong collision induced alignment of the rotational angular momentum of scattered CO. A direct image analysis procedure as described in our previously published paper A. G. Suits et al., J. Phys. Chem. A., 2015, 119, 5925), is employed to extract the fully quantum state resolved alignment-free differential cross sections DCSs) and the state-to-state angle-dependent alignment moments for each final rotational state. The experimental results are compared with advanced theory, in particular with the predictions of CC QM Close-Coupling Quantum Mechanical) and QCT Quasi-Classical Trajectory) calculations. The agreement between experiment and theory is generally found to be quite good throughout the entire scattering angle range for all the final states probed, showing the reliability of the experiment and use of the direct extraction method, as well as the accuracy of the potential surface over the studied collision energy range. A classical kinematic apse hard shell) model was found to be useful in interpreting the measured collision induced alignment moments.
机译：通过测量偏振依赖性差分散射横截面PDDCS的旋转激励的CO分子，通过耦合与速度图，通过测量旋转激发CO分子的抗碰撞能量的旋转绝体散射的旋转内部散射，以700cm（-1）为700cm（-1）的碰撞能量。离子成像。使用简单且坚固的1 + 1'+ 1''）VUV真空超紫色）REMPI谐振增强的多光子电离）方案，通过将平行或垂直于散射平面设定的VUV光偏振方向获得图像。观察到两个偏振的图像之间的清晰差异，表明散射CO的旋转角动量的强烈碰撞感应对准。如先前公布的纸张A. G. Suits等，J. Phys。化学。 A.，2015,119,5925）用于提取完全量子状态分辨对准的差分横截面DCS）和每个最终旋转状态的状态到状态取决词依赖性对准时刻。将实验结果与先进理论进行比较，特别是与CC QM近耦合量子机械的预测和QCT准古典轨迹）计算。实验与理论之间的协议通常被发现在整个整个最终状态的整个散射角度范围内都非常好，探讨了实验和使用直接提取方法的可靠性，以及潜在表面的准确性研究的碰撞能量范围。发现一个经典的运动透视硬壳）模型在解释测量的碰撞诱导的对准时刻是有用的。

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    Sun Zhong-Fa; Bishwakarma Chandan K.; Song Lei; van der Avoird Ad; van Hemert Marc C.; Suits Arthur G.; McBane George C.; Parker David H.;

  • 作者单位

    Radboud Univ Nijmegen Inst Mol &

    Mat Dept Mol &

    Laser Phys Heyendaalseweg 135 NL-6525 AJ Nijmegen Netherlands;

    Radboud Univ Nijmegen Inst Mol &

    Mat Dept Mol &

    Laser Phys Heyendaalseweg 135 NL-6525 AJ Nijmegen Netherlands;

    Radboud Univ Nijmegen Inst Mol &

    Mat Theoret Chem Heyendaalseweg 135 NL-6525 AJ Nijmegen Netherlands;

    Radboud Univ Nijmegen Inst Mol &

    Mat Theoret Chem Heyendaalseweg 135 NL-6525 AJ Nijmegen Netherlands;

    Leiden Univ Gorlaeus Labs Leiden Inst Chem Einsteinweg 55 NL-2333 CC Leiden Netherlands;

    Univ Missouri Dept Chem Columbia MO 65211 USA;

    Grand Valley State Univ Dept Chem Allendale MI 49401 USA;

    Radboud Univ Nijmegen Inst Mol &

    Mat Dept Mol &

    Laser Phys Heyendaalseweg 135 NL-6525 AJ Nijmegen Netherlands;

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