Figure 7. Spectral functions for the CO2–Ar (a) and CO2–Xe (b) systems: experimental (dots) and calculated data (curves). Experimental data for the infrared region are taken from Ref. . The insert in Fig. 7(a) shows details of the spectral function in the microwave region with the experimental data obtained for the following wavenumbers: 0.8 , 2.3 , 4.6 and 15.1 cm-1 .