Abstract

A rise of temperature in a molecular system causes the higher energy levels to become more populated. For the case of CO2 absorption (or, in a lasing medium, gain) calculations based only on single line considerations are sometimes inappropriate as the contributions from some higher energy levels can be appreciable. This paper summarizes this effect for 10.4μ band of CO2. The calculations are compared with the experimental measurements of others.

© 1973 Optical Society of America

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