An Experimental Apparatus for Laser-induced Fluorescences of Molecules and Radicals under Free Jet Coolling

In this paper we indroduce our experimental apparatus which produces a supersonic jet. The LIF spectra of molecules and radicals are simplified compared with that in room temperature. This set provides us with an effectivs tool for studying molecules and radicals in detail. Radicals are generated by a D.C discharge system in the jet.