LASER-EXCITED VIBRATIONAL FLUORESCENCE OF HCl AND THE $HCl-CO_{2}$ LASER

Work supported by the National Science Foundation. $^{1}$ J.R. Airey, J. Quantum Electronics 3, 208, (1967).Author Institution: Department of Chemistry, University of CaliforniaThe light produced by a pulsed Hel laser$^{1}$ has been used to excite the molecular vibration of HCl. The vibrational energy transfer rates in $HCl-CO_{2}$, HCl-HI and other gaseous mixtures were measured. Since the vibrational energy is transferred rapidly from HCl to $CO_{2}$, laser action of $CO_{2}$ is obtained by mixing $CO_{2}$ into the pulsed HCl laser system. By using $CO_{2}$ laser quanta as an indicator, we have effectively titrated the number of HCl vibrational quanta produced in the chemical reaction $Cl\cdot+HI\rightarrow HCl+I\cdot$