Intensities and Self-Broadening Coefficients of Weak Water Vapor Lines in the 720-nm Region Determined by Intracavity Laser Absorption Spectroscopy

✍ Scribed by K. Singh; J.J. Obrien

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 480 KB
• Volume: 167
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1220

✦ Synopsis

The time-resolved quasi-cw form of intracavity laser spectroscopy is used for the quantitative determination of absolute intensities and self-broadening coefficients of weak vibration-rotation lines of water that absorb in the region of the (720-\mathrm{nm}) band. The studies have been conducted using a (0.68-\mathrm{m})-long intracavity absorption cell, and the data are analyzed both by directly fitting the absorption lineshape and by the curve of growth method. Values determined for some of the stronger lines are compared with the ones obtained in previous studies where multipass absorption cells and alternative instrumental techniques were employed. The comparisons show that the accuracy of the intracavity laser spectroscopy technique is comparable to that obtained by the use of other techniques. In addition, intensities and pressure-broadening parameters of several previously unanalyzed transitions are reported. G) 1994 Academic Press, Inc.