Abstract

High-resolution measurements made on the 200–000 telluric band of N2O at 3.9 μ yielded integrated absorption coefficients for individual band lines. When these measurements are combined with laboratory-calibration spectral measurements, 2.0 ± 0.3 mm path N.T.P. is obtained for the amount of N2O present in a standard earth’s air mass.

© 1962 Optical Society of America

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References

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  1. J. W. Birkeland and J. H. Shaw, J. Opt. Soc. Am. 49, 637 (1959).
    [Crossref]
  2. D. H. Rank, D. P. Eastman, W. B. Birtley, G. Skorinko, and T. A. Wiggins, J. Opt. Soc. Am. 50, 821 (1960).
    [Crossref]
  3. W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 850 (1956).
    [Crossref]

1960 (1)

1959 (1)

1956 (1)

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 850 (1956).
[Crossref]

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Figures (1)

Fig. 1
Fig. 1

A portion of the null-gap region of the 200–000 band of N2O at 3.9μ (A) is a trace of the telluric spectrum. (B) is a calibration spectrum recorded in the laboratory by using 1.5 cm Hg of N2O broadened with 35 cm Hg of air in an absorption tube 25 cm in length. (C) is an unbroadened laboratory trace.

Equations (1)

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K = K e / K T = e [ ( J 2 ) ( J 2 + 1 ) J 1 ( J 1 + 1 ) ] ( 1 / T e 1 / T ) ( h c B / K ) .