Computations of temperature dependences for line shape parameters in the 30012 ← 00001 and 30013 ← 00001 bands of pure CO 2

Abstract

In this study, we have calculated the broadening and first order line mixing parameters for over 100 transitions in the 30012 ← 00001 and 30013 ← 00001 bands of carbon dioxide. The calculations were performed over the 193–323 K temperature range for pure CO 2 and lean mixtures of CO 2 and air. The elements of the relaxation matrices were calculated at the appropriate physical conditions using the Exponential Power Gap (EPG) and Energy Corrected Sudden (ECS) scaling laws. We have compared our calculated low pressure line mixing parameters and the broadening coefficients with experimental results from two previous studies in our group available at 217, 234, 258 and 296 K. At all temperatures, the calculated broadening coefficients were also compared with those available in the HITRAN database.