NU-1[--]NU-3 CORIOLIS-ASSISTED INTERMODE TRANSFERS IN O3-M GAS-MIXTURES (M = O2 AND N2) IN THE TEMPERATURE-RANGE 200-300-K FROM IR DOUBLE-RESONANCE MEASUREMENTS

The nu-1<->nu-3 Coriolis-assisted intermode transfers in O3-M gas mixtures (M=O2 and N2) have been investigated in the temperature range 200-300 K by means of a time-resolved double-resonance technique using two CO2 lasers. The rate coefficients k1-3O3 and k1-3M for the processes involving O3-O3 and O3-M collisions respectively have been deduced from the rate constants measured as a function of the molar fraction Z of O3 in the gas mixtures. Their temperature dependences were found to be well fitted in the investigated temperature range by a function of the form k1-3 (T)=k1-3 (300)x(300/T)n.