ABSOLUTE FLUORESCENCE YIELDS FROM ELECTRON-IRRADIATED GASES - XEBR

The techniques of pulse radiolysis and emission spectroscopy have been used to determine absolute total emission yields for the XeBr excipl ex. By application of known formation and quenching rate constants and mechanisms, individual fluorescence yields have been determined for t he unquenched three-body ionic recombination reaction, Xe-2(+) + Br- Xe --> XeBr + 2Xe, G(0)(+) = 3.40 +/- 0.18, and for the reaction of electronically excited xenon atoms with CF3Br, Xe + CF3Br --> XeBr* CF3, G(0) = 0.68 +/- 0.10. These experimental yields are compared to the predictions of current theoretical models, which allow calculatio n of the efficiency for each ion-pair recombination event and excited state reaction to give the fluorescent XeBr exciplex as 75% and 36%, respectively.