Some aspects of CO 2 laser induced fluorescence in SF 6−H 2 mixtures

Abstract

Measurements in SF 6−H 2 mixtures of HF ∗ fluorescence at 2.8 μm induced by pulsed CO 2 laser radiation are reported. The dependence of fluorescence intensity on laser fluence is found to be strongly affected by the laser beam geometry in the interaction region. Our results show that the technique of HF ∗ fluorescence intensity detection can be a sensitive and reliable single-shot measure of multiple-photon dissociation of SF 6 in a collisionless regime on condition that the laser fluence is uniform along the interaction region which is monitored.