DEACTIVATION OF BENDING MODE OF CO2 BY HYDROGEN AND DEUTERIUM

The rate of deactivation of bending mode of CO2 by hydrogen and by deuterium is calculated using long-range forces. It is shown that orthohydrogen is an order of magnitude more effective than parahydrogen at room temperature, the deactivation being affected by J=1→J=3 rotational transition of the ground vibrational level. The agreement with the available data is good up to ∼500°K. The calculation for deactivation by deuterium due to rotational transition J=4→J=6 yields results which are in reasonable agreement with the results of Cottrell and Day.