The effect of vibrationally excited levels on the pressure saturation of the collisional quenching of the B-3(1) state of SO2

Abstract

The pressure saturation effect on the phosphorescence decay rates of the B-3(1) State of SO2 has been reinvestigated by the laser induced phosphorescence method in pure SO2. We have attempted to fit the pressure dependence of the phosphorescence decay rates using the radiationless transition model by introducing different coupling constants for each vibrational level of the B-3(1) state. The experimental decay rates can be fitted well, when the coupling constants for the (0,0,0), (0,1,0) and (0,2,0) levels of the B-3(1) State are 7.2X10(-4), 2.2X10(-3) and 5.9X10(-3) cm(-1), respectively.