化学学报 ›› 1998, Vol. 56 ›› Issue (10): 956-959. 上一篇    下一篇

研究论文

K+I~2→K^++I~2^-离子对生成反应态-态几率与 选态截面的量子散射理论研 究

冯大诚;蔡政亭;邓从豪   

  1. 山东大学理论化学研究室.济南(250100)
  • 发布日期:1998-10-15

Quantum scattering studies on the state-to-state probabilities and selected-state cross sections for ion-pair formation process: K+I~2→ K^++I~2^-

Feng Dacheng;Cai Zhengting;Deng Conghao   

  1. Shandong Univ, Theoret Chem Lab.Jinan(250100)
  • Published:1998-10-15

本文用Miller的-矩阵变分法在Aten-Lanting-Los两态势能面上计算了K+I~2→K^++I~2^-电离反应的态-态几率和选态反应截面,结果表明了低电离阈能、几率的振荡行为及振动增强效应;电离截面随碰撞能及I~2振动量子数的变化规律与实验预测相吻合;讨论了反应机理。

关键词: 离子对生成, 离子对, 电离, 反应动力学, 变分法, 矩阵, 量子散射, 截面, 反应机理, 国家教委高等学校博士学科点专项科研基金

The state-to-state probabilities and selected-state cross sections of ion-pair formation process K+I~2→K^++I~2^- on Aten-Lanting-Los two-state potential energy surface have been calculated using Miller's S-matrix variational approach. The results show that this ionization reaction has low threshold energy, oscillatory probabilities and enhanced-vibrational effect; ionization cross sections as a function of collision energy and the vibrational quantum number of molecule I~2 are in agreement with experimental observations as well. Ionization mechanism has been discussed.

Key words: ION PAIRS, IONIZATION, REACTION KINETICS, VARIATIONAL METHOD, MATRICES, CROSS PROFILE, REACTION MECHANISM

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