Abstract

Whether two neighboring infrared absorption lines, both in the square-root region of the curve of growth, are nearly free of mutual intrusion or so overlapped as to nearly coincide over a broad range of experimental conditions and line parameters is formulated. We also are able to estimate the unsullied equivalent width of the collision-broadened line pair at these limits. This should greatly extend the number of isolated infrared vibration–rotation band members that may be measured and tested for the validity of assigned line parameters and tested for the assumed Lorentz shape. The experimentally reported strong water lines at ν0 = 1429.96 cm−1, 1447.98 cm−1, and 1464.93 cm−1 in the 6.3-μ band are confirmed to be independent of their strong neighbors.

© 1972 Optical Society of America

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