Mv. Tonkov et al., MEASUREMENTS AND EMPIRICAL MODELING OF PURE CO2 ABSORPTION IN THE 2.3-MU-M REGION AT ROOM-TEMPERATURE - FAR WINGS, ALLOWED AND COLLISION-INDUCED BANDS, Applied optics, 35(24), 1996, pp. 4863-4870
Measurements of pure CO2 absorption in the 2.3-mu m region are present
ed. The 3800-4700-cm(-1) range has been investigated at room temperatu
re for pressures in the 10-50-atm range by using long optical paths. P
henomena that contribute to absorption are listed and analyzed, includ
ing the contribution of far line wings as well as those of the central
region of both allowed and collision-induced absorption bands. The pr
esence of simultaneous transitions is also discussed. Simple and pract
ical approaches are proposed for the modeling of absorption, which inc
lude a line-shape correction factor chi that extends to approximately
600 cm(-1) from line centers.