Abstract
We have developed high-precision dispersion-absorption methods for studies on collision induced absorption in the metal-vapor-foreign-gas mixtures. The set-up consists of a heat pipe oven, a Mach-Zehnder interferometer, and a spectrometer equipped with a multi-channel detector. High-speed multi-channel detection of the interferometric dispersion spectrum near the resonance line of the metal atom allows us to determine the metal-atom number-density integrated over the line-of-sight with high-precision (1%). Combining this dispersion tech nique with the double-beam absorption method, we have measured reduced absorption co efficients for the collision-induced absorption associated with the 5s21S0-5s4d1D2 transition of Sr in the Sr-He and Sr-Ar systems. Detailed procedures of the experiment and the data analysis are described.
