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Differential Cross Sections and Collision-Induced Rotational Alignment in Inelastic Scattering of NO(X) by Xe
Mark Brouard*1, Helen Chadwick1, Sean D. S. Gordon1, Cornelia G. Heid1, Balazs Hornung1, Bethan Nichols1, Jacek K?os2, Pablo G. Jambrina3, F. Javier Aoiz4
1.The Department of Chemistry, University of Oxford, The Chemistry Research Laboratory, 12 Mans-field Road, Oxford OX1 3TA, UK;2.Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA;3.Departamento de Química Física, Facultad de Ciencias Químicas, University of Salamanca, Sala-manca, Spain;4.Departamento de Química Física, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain
Abstract:
Fully ?-doublet resolved differential cross sections and collision-induced rotational alignment moments have been measured for the NO(X)-Xe collision system at a collision energy of 519 cm-1. The experiments combine initial quantum state selection, employing a hexapole inhomogeneous electric field, with quantum state resolved detection, using (1+1') resonantly enhanced multiphoton ionization and velocity map ion imaging. The differential cross sections and polarization dependent differential cross sections are shown to agree well with quantum mechanical scattering calculations performed on ab initio potential energy surfaces [J. K?os et al. J. Chem. Phys. 137, 014312 (2012)]. By comparison with quasi-classical trajectory calculations, quantum mechanical scattering calculations on a hard-shell potential, and kinematic apse model calculations, the effects of the attractive part of the potential on the measured differential cross sections and collision-induced rotational alignment moments are assessed.
Key words:  Chemical Physics, Reaction dynamics, Inelastic scattering
FundProject:
Supplymentary:   CJCP2002020SP.pdf
Xe对NO(X)微分截面和非弹性散射中的碰撞诱导旋转准直
Mark Brouard*1, Helen Chadwick1, Sean D. S. Gordon1, Cornelia G. Heid1, Balazs Hornung1, Bethan Nichols1, Jacek K?os2, Pablo G. Jambrina3, F. Javier Aoiz4
1.英国牛津大学化学系,牛津 OX13TA;2.美国马里兰大学化学与生物化学系,马里兰州 20742;3.西班牙萨拉曼卡大学化学科学学院物理化学系,萨拉曼卡;4.西班牙康普顿斯大学化学学院物理化学系,马德里 28040
摘要:
本文对NO(X)-Xe碰撞系统在碰撞能量为519 cm-1,测量了完全?-双峰分解的微分截面和碰撞引起的旋转准直力矩. 同时结合初始量子态选择,使用六极杆的非均质电场,借助量子态分辨的测量,利用(1+1')共振增强的多光子电离和速度离子成像. 结果显示,微分截面以及偏振相关的微分截面均显示与从头算势能面上进行的量子力学散射计算[J. K?os etal. J. Chem. Phys. 137, 014312 (2012)]一致. 通过与准经典轨迹、硬壳势能的量子力学散射以及运动近端模型的比较,评估了势能对所测微分截面和碰撞引起的旋转准直力矩的影响.
关键词:  化学物理,反应动力学,非弹性散射
DOI:10.1063/1674-0068/cjcp2002020
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