束—气条件下He（2^3S）＋CH2Cl2碰撞传能反应的动力学研究  

The Kinetic Study of Energy Transfer Reaction He(2￣3S)+CH_2Cl_2 in a Beam-Gas Condition

作　　者：李全新[1] 陈从香[1] 马兴孝[1] 李学初[1] 沈关林[1] 

机构地区：[1]中国科技大学化学物理系,中国科学院大连化学物理研究所

出　　处：《Chinese Journal of Chemical Physics》1994年第6期487-493,共7页化学物理学报（英文）

摘　　要：本文在束－气条件下研究了亚稳态原子Ｈｅ（２＾３Ｓ）与ＣＨ２Ｃｌ２间的传能反应，测得了由该反应产生的ＣＨ（Ａ＾２△－Ｘ＾２П），ＣＨ（Ｂ＾２∑＾－Ｘ＾２П）ＣＨ（Ｃ＾２∑＾＋－Ｘ＾２П）和Ｈ原子（Ｂａｌｍｅｒ系）的化学发光光谱。通过对ＣＨ（Ａ，Ｂ）的光谱进行计算机模拟，推测出初手的ＣＨ（Ａ＾２△，ｖ＾１＝０－２）态振动分布为Ｎｏ：Ｎ１：Ｎ２＝１００：４０±５：１９±２，ＣＨ（Ａ＾２△。Abstract The reaction or CH_2Cl_2 by collission with He(2￣3S) has been studied in beam-gas conditions. The emissions of CH(A￣2△-x￣3Π, B￣2∑￣--x￣2Π, C￣2∑￣+-x￣2Π) and H￣* (Balmer line) were observed. The nascent vibrational distribution of CH(A) from He(2￣3S) / CH_2Cl_2 was determinedto be N_0: N_1: N_2 = 100: 40 ± 5: 19 ± 2. The rotational distribution were expressed by 3300 ±300(N' > 8), 2800 ± 500K, and 1900 ± 500K for v' = 0,1,2 of CH(A) and 3300 ± 400K for v' = 0 ofCH(B). The rotational temperature is lower (2000 ± 200K) at N' < 8 of CH(A,v' = 0). The doubleBoltzmann distribution of CH(A) is not due to collision rclaxation. The formation rate constants of CH(A.B,C), CCl(A) and H￣* from He(2￣3S)/ CH_2Cl_2 reaction were determined. Themechanism of above reaction were also disscused.

关 键 词：传能反应 氦 二氯甲烷 反应动力学 

分 类 号：O643.12[理学—物理化学] O613.11[理学—化学]