Calculation of the Linewidth of N₂O

Abstract

The linewidths for the 2224 cm⁻¹ N₂O band are calculated using Anderson’s theory. The mean value of the half-width is found to be 0.085 cm⁻¹ atm⁻¹ for self-broadened N₂O and 0.072 cm⁻¹ atm⁻¹ for N₂-broadened one at 300°K, respectively, by comparing the calculated widths with the measured ones. Values of the spectral absorptance computed using the quasi-random band model and a half-width of 0.072 cm⁻¹ atm⁻¹ at 300°K are in good agreement with the measurements of absorptance. The value of the self-broadening coefficient is also compared with the experiment.