Ar(3P0,2)+NH3初生态产物NH2(A2A1)的内态分布

摘要

Study on the state distribution of nascent product NH2(A2A1)in the reaction of Ar(3P0,2)+NH3 under beam condition has been reported firstly herein.The emissionrn spectra of NH2(A-X) were assigned in detail.Most of the emission bands are attributed to(0,ν2'，0)-(0,0,0)transition with ν2'rn5,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 NH3.It should be attributed to the recoil effect of collisive partner when Ar separates from NH3.%首次报告了在分子束条件下，研究Ar(3P0,2)+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[HTSS]（0,vrn2'，0)→（0,0,0）跃迁（v'≤5,K'a≤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,v'=2,k'arn=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，后者仅观察到轴的转动激发。