ESTIMATION OF ROTATIONAL LINE WIDTHS OF CARBON DIOXIDE BANDS

Anderson's theory on the non-adiabatic collision broadening of the infrared spectral lines has been applied to CO2-CO2 and CO2-N2 collisions. The intermolecular attractive force assumed in this study is that due to either CO2 quadrupole-CO2 quadrupole interaction or CO2 quadrupole-N2 quadrupole interaction. The self-and N2-broadened line widths are calculated on four important bands in the 15μ and 4·3 μ band regions, assuming several different values for the CO2 and N2 quadrupole moments and taking into account the Maxwell-Boltzmann distribution law of the colliding velocity. The results are then used for the determination of plausible values of CO2 and N2 quadrupole moments by comparing with available experimental results. © 1969.