Ar(~3P_(0,2))+NH_3初生态产物NH_2(A^2A_1)的内态分布  

The State Distribution of NH_2(A^2A_1) Produced in the Collision of Ar(~3P_(0,2)) +NH_3

作　　者：邹胜利[1] 董峰[1] 王黎明[1] 李学初[1] 崔执凤[2] 

机构地区：[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 [2]安徽师范大学物理系,芜湖241000

出　　处：《Chinese Journal of Chemical Physics》2000年第1期1-5,共5页化学物理学报（英文）

基　　金：国家攀登计划;自然科学基金!29873051

摘　　要：首次报告了在分子束条件下，研究Ａｒ（３Ｐ(０，２)）＋ＮＨ３碰撞解离反应。利用单光子计数方法进行测量，获得了部分转动分辨的初生态产物ＮＨ２（Ａ２Ａ１）-（Ｘ２Ｂ１）发射谱，并详细地进行了标识。发现主要为（０，Ｖ２，０）－（０，０，０）跃迁（Ｖ２≤５，Ｋａ≤６，Ｊ’≤１０）。通过对部分分辨较好的光谱范围进行了模拟，得到反应生成的ＮＨ２（Ａ２Ａ１，Ｖ２’＝２，ｋ’ａ＝１）态绕ｂ／ｃ轴的转动温度为１０５０Ｋ，高于母体分子ＮＨ３的转动温度３００Ｋ．由亚稳态碰撞传能电子交换机理认为这是由于碰撞对手Ａｒ和母体ＮＨ３分离时反冲作用的结果。碰撞传能解离机理和光解过程不同，后者仅观察到ａ轴的转动激发。Study on the state distribution of nascent product NH_2(A^2A_1) in the reaction of Ar(~3P_(0,2))+NH_3 under beam condition has been reported firstly herein. The emission spectra of NH_2(A-X) were assigned in detail. Most of the emission bands are attributed to (0, v2', 0) -(0, 0, 0) transition with v2' ≤5, k'a ≤6, J' ≤10. Rotational temperature around b/c axis of level (0, 2, 0, K'a =1) is 1050K, Which is higher than that of the parent NH_3. It should be attributed to the recoil effect of collisive partner when Ar separates from NH_3

关 键 词：碰撞解离 产物态分布 NH2自由基 氨气 氩气 

分 类 号：O643.12[理学—物理化学]