物理化学学报 >> 1995, Vol. 11 >> Issue (02): 123-130.doi: 10.3866/PKU.WHXB19950206

研究论文 上一篇    下一篇

CH3NO2与HE(23S)、Ne(3P0.2)的解离激发反应

于化忠, 王利明, 李学初, 顾月姝, 孙琦, 印永嘉   

  1. 中国科学院大连化学物理研究所分子反应动力学国家重点实验室|大连 116023
  • 收稿日期:1993-12-25 修回日期:1994-04-05 发布日期:1995-02-15
  • 通讯作者: 李学初

Dissociative Excitation of CH3NO2 by Collisions with HE(23S) and Ne(3P0.2)

Yu Hua-Zhong, Wang Li-Ming, Li Xue-Chu, Gu Yue-Shu, Sun Qi, Yin Yong-Jia   

  1. State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chem.Phys.CAS Dalian 116023
  • Received:1993-12-25 Revised:1994-04-05 Published:1995-02-15
  • Contact: Li Xue-Chu

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摘要：

利用分子束和化学发光技术，在单次碰撞条件下，首次研究了亚稳态原子He（23S）、Ne（3P0．2）与CH3NO2的解离激发反应，探测到反应的激发态产物（CH（A）、CH（B）、CH（C）的化学发光，在He（23S）／CH3NO2反应中同时探测到H（Balmer）的发射．利用He（23S）＋N2→N2＋（B）＋He＋e－作参考反应，测定了反应He（23S）／CH3NO2产生的CH的A－X，B－X，C－X以及H原子的发射速率常数．利用化学发光光谱的计算机模拟，求得了激发态产物CH（A）的初生态振动布居和转动温度．结合相空间理论对解离过程CH（A）的形成通道进行了讨论，认为CH（A）的形成是经由中间体CH3*的二体解离过程．

关键词: 解离激发, 发射速率, 振转布居

Abstract:

Dissociative excitation of CH3NO2 by collision with He(23S) and Ne(3Po.2)has been studied respectively by observing CH(A2△→ X2п,B2∑→ X2п) andC2∑ → X2п and H (Balmer) (only in the He(23S)/CH3NO2 reaction) emissions in the beam apparatus under single collision. The emission rate constants of A - X, B – X and C - X of CH and H produced from the He(23S)/CH3NO2 reaction were determined by using the reference reaction method. The nascent vibrational distributions and rotational temperatures of CH(A) were determined through computer simulation assumming a Boltzmann rotational distribution. The dissociative process and the formation mechanism of CH(A) were studied, and a two-body dissociative process through an intermediate CH3* for CH（A）was suggested.

Key words: Dissociative excitation, Emission rate, Rovibrational population