Absolute Intensities of the 721 and 742 cm—1 Bands of CO2

The absolute intensities of the ${01}^1{\text{0→10}}^{0}0$ and ${02}^2{\text{0→11}}^{1}0$ bands of CO₂ at 721 and 742 cm^—1, respectively, have been determined with a curve‐of‐growth method utilizing the Elsasser periodic line pattern and a slit function calculation. The resulting intensities were $S_{{01}^1{\text{0→10}}^0{0}^{{329}^{°}\mathrm{K}}}\text{=7.5\hspace{0.17em}}{\mathrm{cm}}^{\text{−2}}$ atmos^—1 and $S_{{02}^2{\text{0→11}}^1{0}^{{329}^{°}\mathrm{K}}}\text{=0.22\hspace{0.17em}}{\mathrm{cm}}^{\text{−2}}$ atmos^—1. In addition the intensity of the ${03}^1{\text{0→12}}^{0}0$ band at 740 cm^—1 was estimated to be $S_{{03}^1{\text{0→12}}^0{0}^{{329}^{°}\mathrm{K}}}\text{=0.032\hspace{0.17em}}{\mathrm{cm}}^{\text{−2}}$ atmos^—1.