高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (7): 2279.doi: 10.7503/cjcu20210198

• 研究论文 • 上一篇    下一篇

碰撞能对K(2S)+HF(X1Σ+)→KF(X1Σ+)+H(2S)反应的影响

陈海亮1,张志红2,吕文彩1,3   

  1. 1.青岛大学物理科学学院, 青岛 266000
    2.鲁东大学物理与光电工程学院, 烟台 264025
    3.吉林大学理论化学研究所, 长春 130000
  • 收稿日期:2021-03-24 出版日期:2021-07-10 发布日期:2021-06-18
  • 基金资助:
    国家自然科学基金(21773132)

Effect of Collision Energy on the Stereodynamics of the Reaction K(2S)+HF(X1Σ+)→KF(X1Σ+)+H(2S)

CHEN Hailiang1, ZHANG Zhihong2, LYU Wencai1,3()   

  1. 1.College of Physics,Qingdao University,Qingdao 266071,China
    2.School of Physics and Optoelectronics Engineering,Ludong University,Yantai 264025,China
    3.Institute of Theoretical Chemistry,Jilin University,Changchun 130021,China
  • Received:2021-03-24 Online:2021-07-10 Published:2021-06-18
  • Contact: LYU Wencai E-mail:wencailu@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21773132)

摘要:

基于Sayós等构建的基态势能面, 运用准经典轨线方法对原子-分子反应K(2S)+HF(X1+)→KF(X1+)+ H(2S)的立体动力学性质进行了研究. 计算了该反应的极化微分反应截面、 两矢量k?j'相关分布函数P(θr)、 三矢量k?k'?j'相关分布函数P(?r)和空间分布函数P(θr,?r). 结果表明, 产物KF的转动角动量j′不仅在垂直于反应物相对速度矢量k的方向上有强烈的取向效应, 而且还定向于y轴的负方向, 转动角动量j′敏感地依赖于碰撞能.

关键词: 立体动力学, 准经典轨线方法, 矢量相关, 碰撞能效应

Abstract:

The stereodynamics of the atom-molecule reaction K(2S) +HF(X1+)→KF(X1+) +H(2S) was studied using quasi-classical trajectory method based on the potential energy surface constructed by Sayós et al. Four generalized polarization-dependent differential cross-sections[(2π)(dσ00/dωt), (2π)· (dσ20/dωt), (2π)(dσ22+/dωt), (2π)(dσ21-/dωt)], the distributions functionPθr)], the dihedral angle distribution function[P?r)] and the polar distriloution function[Pθr?r)]are studied in detail. The results show that the rotational angular momentum j′of the product KF is not only strongly aligned along the direction perpendicular to k, but also oriented along the negative direction of the y axis. The orientation of j′depends very sensitively on the collision energy.

Key words: Stereodynamics, Quasi-classical trajectory, Vector correlation, Collision energy effect

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