Fluorescence Analyses of Oxygen Molecules Excited by an AF Excimer Laser

The laser-induced fluorescence method has offered a powerful diagnostic tool for the measurements of transonic and supersonic flows. The present paper uses a tunable line-narrowed AF excimer laser that lases with the 193.5nm ultra-violet wavelength. This laser is injected into the static gas cell with variable pressure. The gases used are argon for the Rayleigh scattering and oxygen for the Raman scattering and induced fluorescence measurements. The Rayleigh scattering intensity is measured as a function of the cell pressure, and also the spectroscopic characteristics are obtained for the Raman and fluorescence from the oxygen molecules.