Abstract:Relaxation to photophysical steady state during infrared absorption was measured at four different wavenumbers, distributed over the C-F stretching band so as to vary the average rotational energy of the absorbing molecules between 2.4 and 7.8 kJ/mol. Pressure of CHC12F ranged from 1.5-47 Torr. Mean vibrational energy ranged from 3.37 to 20 kJ/mol. The relaxation mechanism is collisional and, as in the case of CHC1F2, consists of parallel R-R' and resonant V-V exchange. The rate constants are practically indep… Show more
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