利用微波放电Cl2/He等离子体作为Cl源,对反应NCl(a¹Δ)/I(²P_3/2) → NCl(X³Σ) + I(²P_1/2) 进行了实验研究,得到了较大的I(²P_1/2)自发辐射荧光信号,检测到NCl(a¹Δ,b1Σ)自发辐射荧光光谱在存在少量I(2P_1/2)下发生的显著变化,其中NCl(a¹Δ)自发辐射荧光信号降低,同时由于I(2P_1/2)的作用,NCl(b¹Σ)自发辐射荧光信号大幅度增加.在考察各反应气体流量对I(2P_1/2)自发辐射荧光信号的影响时发现,在本次实验条件下,各种气体的最佳流量:He为1～4mmol/s,I2为0.01～0.03mmol/s, Cl2为1.0mmol/s左右,而HN3流量略大于Cl2流量时信号升高幅度开始变缓,约为Cl2流量的两倍时信号不再有显著的变化.

NCl(a¹Δ) /I(²P_3/2)System was studied by using microwave discharge Cl₂/He plasma as Cl atoms source. Strong I (²P_1/2) radiation at 1315 nm was obtained. The considerable changes of NCl(a¹Δ) and NC1 (b¹ summation ) radiation at 1077 nm and 665 nm respectively were observed when a little amount of I₂ was injected into the flow of Cl and HN₃,. namely NC1 (a¹Δ) radiation at 1077nm decreased rapidly while NCl(b¹ summation ) radiation at 665 nm increased rapidly due to the reactions NCl(a¹Δ) + I(²P_3/2)-> NCl(X³ summation ) + I(²P_1/2) and NCl(a¹Δ)+I(²P_1/2)-> NCl(b¹ summation ) +I(²P_3/2). The intensity dependence of I (²P_1/2) radiation at 1315 nm on He, Cl₂ HN₃ and I₂ flow rate was investigated. The results show that the optimum flow rate for gases of He, I₂ ,Cl₂ and HN₃ are 1-4, 0.01-0.03, 1 and l-2 mmol/s respectively.