[OPTICAL REVIEW Vol. 14, No. 6 (2007) 368-372]
© 2007 The Optical Society of Japan

Band Model for Modified Lorentz Lines

Mikihiko HIRONO, Akira TANEMURA1, and Yusuke HONDA1

Faculty of Engineering, Niigata University, Niigata 950-2181, Japan
1Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan

(Received March 30, 2007; Accepted October 15, 2007)

A random model for band absorption is applied to modified Lorentz lines. Simplified expressions of the averaged equivalent width are derived for the exponential and Malkmus distributions of the line intensities. It is shown that line-mixing effects are significant when the product of the coupling coefficient and absorber concentration is large. This model is applied to the 5.3 μm band of NO.

Key words: line mixing, band model, line shape, infrared absorption, atmospheric radiation