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在光引发F_2/H_2链反应脉冲化学激光中,是用F_2/H_2/He/O_2体系,把F_2/He/O_2及 H_2/He二组气体快速互击混合流入激光管,用Xe灯引发,进行化学激光的研究。我们采用动态紫外吸收光谱法测定了在这一互击混合过程中F_2/H_2预反应的程度。测定了O_2的阻抑效应、稀释剂He的缓和作用、预混器壁温的影响、总压及F_2/H_2比变化对预反应的影响等,为进一步寻找抑制预反应的条件提供了依据。对实验中出现的“反常”现象作了简单的讨论。
In the F 2 / H 2 chain reaction pulsed chemical light, the F 2 / He / O 2 and H 2 / He gases are rapidly intermixed and injected into the laser tube by F 2 / H 2 / He / O 2 system, Conducting chemical laser research. We measured the extent of F_2 / H_2 pre-reaction during this intermixing mixing by dynamic UV absorption spectroscopy. The inhibitory effect of O_2, the mitigating effect of diluent He, the influence of premixer wall temperature, the total pressure and the effect of F_2 / H_2 ratio on the pre-reaction were investigated, which provided the basis for further searching for the preconditioning conditions. The phenomenon of “abnormal” appeared in the experiment was briefly discussed.