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这台装置由三大部分组成:真空系统、束源和检测仪器。气束源室、准直室、炉室、反应室和质谱室采用差级抽气。除质谱室用了一台离子泵外,各室均用油扩散泵抽气。束源之一是超音速喷射气束,另一个是加热电炉,其最高加热温度为1600℃,可产生各种金属原子束。当两束工作时,反应室的压强可维持在10~(-6)托左右。设计中考虑到了下列检测手段:①用于检测产物质量数、束强度和速度分布的四极滤质器;②用于化学发光反应产物分析的分光光谱仪;③用于产生激光诱导荧光的可调谐染料激光器;④用于观测反应产物化学发光角分布的照相机或 OMA(光学多通道分析器)。因此,这台装置可以用于下列实验研究。(a)化学发光反应产物的态分布;(b)用激光诱导荧光技术检测“暗”反应产物的态分布;(c)反应物的初始能态对反应的影响;(d)激光光解离。
This device consists of three major components: vacuum system, beam source and detection equipment. The gas source chamber, the collimation chamber, the furnace chamber, the reaction chamber and the mass spectrometer chamber use differential pumping. In addition to an ion pump in the mass spectrometer chamber, each chamber was purged with an oil diffusion pump. One of the beam sources is a supersonic jet gas beam, and the other is a heated electric furnace with a maximum heating temperature of 1600 ° C, which produces a variety of metal atomic beams. When two beams work, the reaction chamber pressure can be maintained at about 10 ~ (-6) Torr. The following means of detection are considered in the design: ① Quadrupole mass filter for detection of product mass, beam intensity and velocity distribution; ② Spectrophotometer for analysis of chemiluminescence reaction products; ③ Tunable for generating laser-induced fluorescence Dye laser; ④ camera or OMA (optical multi-channel analyzer) for observing the chemiluminescence angle distribution of the reaction product. Therefore, this device can be used for the following experimental study. (a) the state distribution of the chemiluminescent reaction product; (b) the detection of the state of the “dark” reaction product by laser induced fluorescence; (c) the effect of the initial energy state of the reactant on the reaction; (d) .