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Science 25 August 1972:
Vol. 177. no. 4050, pp. 694 - 695
DOI: 10.1126/science.177.4050.694
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Articles

Tunable Infrared Laser Spectroscopy of Atmospheric Water Vapor

F. A. Blum 1, K. W. Nill 1, P. L. Kelley 1, A. R. Calawa 1, and T. C. Harman 1

1 Lincoln Laboratory, Massachusetts Institute of Technology, Lexington 02173

Absorption lines in the v, band of water vapor at 6.3 micrometers have been fully resolved by using a tunable semiconductor laser. Three attnospheric water vapor lines near 5.32 micrometers were studied in detail and found to have linle widths two to four times narrower than the width calculated by Benedict and Kaplan.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)