Lc. Chang et al., RECOMBINATION REACTIONS OF ATOMIC CHLORINE IN COMPRESSED GASES .1. CHEMILUMINESCENCE SPECTRA OF CHLORINE MOLECULES WITH ARGON PRESSURE UP TO 170 BAR, Journal of physical chemistry, 100(32), 1996, pp. 13548-13553
The gas-phase chemiluminescence spectra of chlorine atom recombination
reactions in argon with pressures up to 170 bar were recorded by the
laser photolysis/chemiluminescence detection scheme. With the spectros
copic data available in the literature and the monochromator functions
determined experimentally and by assuming that the pressure line broa
denings and frequency shifts follow the conventional Lorentzian form,
for the first time the chemiluminescence spectra were quantitatively d
ecomposed into the emissions of the B (3) Pi(0(u)(+)) --> X (1) Sigma(
g)(+) and A (3) Pi(1(u)) --> X (1) Sigma(g)(+) transitions. The relati
ve luminescence weights of these two emission electronic states, the v
ibrational temperatures, the pressure line broadenings, and frequency
shifts were obtained. Their implications on the mechanisms of the chlo
rine atom recombination reactions and the interaction strength between
the chlorine molecule and argon atom were discussed.