A detailed energy transfer mechanism in pentafluorobenzene/argon mixtures

Abstract

Energy transfer, following IR laser excitation, was studied in mixtures of pentafluorobenzene (PFB) and argon employing a new method that uses Lorentz and Doppler broadening of the Hg multiplet lines near 254 nm to sense temporal translational energy changes. From such measurements, as a function of initial laser excitation energy, pressure and composition of the gas mixture, we derive specific collision efficiencies for the interchange of energy between vibrational, rotational and translational degrees of freedom in the mixture.