Chemiluminescence is an important method of measuring parameter in optical cavity flow field for HF/DF chemical laser.In the process of increasing H2 flow rate,the changing of the chemiluminescence in visible range in the optical cavity flow field of discharge driven HF laser Was observed and mcoMed,and the spectrum of the chemiluminescence On the optic axis was measured.The component particle of the gas in the optical cavity Was analyzed theoretically,and the high order overtone spectral line of HF molecule Was computed.It Was found that the spectral line of the transition from 3 order vibration excited state to ground state was in infrared region.The measured spectrum of the chemiluminescence and the spectral line of the particle was compared,discovering that the yellow-green chemiluminescence was formed by the radiation of the excited F,He,H,N,HF and other panicle,which corrected the explanation in some classic]itcrature that the yellow-green chemiluminescence was formed by the 3,4,5 order overtone radiation of HF molecule.This further explains the color forming of the chemiluminescence on the optic axis.%化学发光方法是HF/DF化学激光器光腔流场参数的重要实验测量方法.观察并记录了在增大H2流量时,电激励HF激光光腔流场可见光荧光的变化现象,对光轴处可见光荧光进行了光谱测量.对激光器光腔内介质成分进行了理论分析,HF高阶泛频谱线计算结果显示第3振动激发态到基频的跃迁谱线处于红外区.通过对荧光实验测量光谱与光腔内介质谱线的比对,发现黄绿色的荧光是由F、He、H、N、HF等及其他激发态介质共同形成的,修正了经典文献中关于荧光是由HF分子的3、4、5高阶泛频辐射形成的观点,对光轴处荧光的颜色作出了解释.
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