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Measurements of XeF (xenon fluoride) ground-state dissociation and vibrational equilibration. Technical report

The removal rates of the lower levels of the laser transitions affect the efficiency of the XeF excimer-laser performance. The authors deduced the removal rates of XeF(X,v) in argon, helium, and neon by measuring the populations of v = 0 and 1 vibrational levels formed by the photolysis of XeF/sub 2/. The time history of each vibrational population is monitored with a c-w tunable dye laser tuned to an absorption feature of the selected vibrational/rotational level. The studies show a rapid vibrational relaxation of v = 0 and v = 1 levels followed by a common decay rate of the two levels. Helium and neon were found to remove these levels with the same rate coefficient of (2.0 + or - 0.2) x 10/sup 4//(sec-Torr)/sup -1/ at room temperature. The rate coefficients for argon were faster by about 25%. The removal-rate coefficients increased with temperature in the range of 23 to 95 C.