SiH_4分子的单脉冲激光光声光谱

The Photoacoustic Spectrum of SiH_4 Molecules using Grating Tuned TEA CO_2 Laser

本工作测得了在 926.96cm^(-1)～108844.72cm^(-1)波段 SiH_4分子与CO_2激光谱线对应的光声光谱,确定了SiH_4分子的最佳吸收线位置,还用光声谱法测得了声音的传播速度及V-T驰豫时间,验证了在小的光强时光声信号与光强的线性关系.

The pulse photoacoustic spectrum of SiH4molcculcs has been obtained in the range from 926.96cm-1 to 1084.72cm-1 correspond to the lines of CO2 laser. The most optical absorption line position of SiH4 molecules is identified. The speed of sound travel and V-T relaxation time have also been measured by using photoacoustic method. The linear rcla-tionship between pholoacoustic signal and laser intensity under the condition of small in-tensity is demonstrated.