Figure 1

Spectral characteristics of CO₂.

(a) CO₂ absorption spectrum at 1430–1452 nm. (b) Energy band diagram of the three main transition bands in the wavelength region of 1430–1452 nm: asymmetric vibrational transition 00001 → 00031 and the accompanying hot bands 01101 → 01131 and 10002 → 10032. (c) Schematic diagram of the vibration-rotation spectra of 00001 → 00031 transition band, with the P branch (vibrational transition accompanied by a decrease in the rotational quantum number −1) and R branch (vibrational transition accompanied by an increase in the rotational quantum number +1).