CH3NO2与HE(23S)、Ne(3P0.2)的解离激发反应

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．

Dissociative Excitation of CH_3NO_2 by Collisions with He(2~3S) and Ne(~3P_(0.2))

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.