C_2H_4分子红外吸收特性的光声探测

Photoacoustic Measurement of the IR Absorption Properties of C_2H_4Molecule

用ＴＥＡＣＯ２激光做激发源，用光声法检测了９．２～１０．８μｍ波长范围内Ｃ２Ｈ４分子的红外吸收特性，获得了Ｃ２Ｈ４分子的单脉冲激光光声谱，它与Ｃ２Ｈ４分子的红外吸收谱及光热谱符合的较好；并用光声法测得了样品气体中的声速及Ｃ２Ｈ４分子的Ｖ－Ｔ驰豫时间。

The IR absorption properties of C2H4 molecule irradiated by pulsed TEACO2laser were studied with photoacoustic technique. The pulse photoacoustic spectrum of C2H4molecule was obtained corresponding to the lines of CO2 laser. It corresponded with the IRabsorption spectrum of C2H4 molecule. The speed, in which sound travels in the sample gas and V-T relaxation time of C2H4 molecule were also measured with the photoacoustic technique.