Quenching and Vibrational Energy Transfer in the Fluorescence Spectrum of S2

摘要

The ultraviolet fluorescence of S2was excited by the strong Mg spark lines lgr;lgr;2928 and 2937A. A typical Wood resonance progression was observed with pure S2only in the vessel, but the addition of a few millimeters of any of the rare gases caused changes in the fluorescence due to quenching and to the transfer of vibrational and rotational energy. The yields per collision for quenching and for vibrational transfer are of the order of magnitude of unity, and both show the same dependence on the atomic weight of the rare gas added, with a minimum in the vicinity of Ar or Kr. Comparisons are made with the results obtained by other methods. Quenching occurs by the addition of two quanta of vibrational energy to the S2, followed by disruption due to predissociation.