Abstract

Quantitative measurements on the absorption coefficient of air have been made for about three hundred and fifty points between 380 and 1600A. Because of difficulties in maintaining a constant intensity with extreme ultraviolet light sources, it was necessary to use a many-line spark source rather than a continuous spectrum, with the result that much of the fine structure of the absorption bands has been lost. Photographic measurements with oiled plates show strong absorption between 1600A and 1300A, a quite transparent region between 1300A and 1000A, and a very highly absorbing group of bands at the shorter wave-lengths. Although these bands below 1000A are poorly resolved, a wealth of fine structure is evident.

© 1940 Optical Society of America

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References

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  1. T. Lyman, Spectroscopy of the Extreme Ultraviolet (Longmans, Green and Company, 1928).
  2. R. H. Messner, Zeits. f. Physik 85, 727 (1933).
    [Crossref]
  3. R. Ladenburg and C. C. Van Voorhis, Phys. Rev. 43, 315 (1933).
    [Crossref]
  4. E. G. Schneider, J. Chem. Phys. 5, 106 (1937).
    [Crossref]
  5. G. R. Harrison and P. A. Leighton, J. Opt. Soc. Am. 20, 313 (1930).
    [Crossref]
  6. W. C. Price and G. Collins, Phys. Rev. 48, 714 (1935).
    [Crossref]
  7. J. J. Hopfield, Phys. Rev. 36, 789(A) (1930).
  8. T. Lyman, Phys. Rev. 48, 149 (1935).
    [Crossref]

1937 (1)

E. G. Schneider, J. Chem. Phys. 5, 106 (1937).
[Crossref]

1935 (2)

W. C. Price and G. Collins, Phys. Rev. 48, 714 (1935).
[Crossref]

T. Lyman, Phys. Rev. 48, 149 (1935).
[Crossref]

1933 (2)

R. H. Messner, Zeits. f. Physik 85, 727 (1933).
[Crossref]

R. Ladenburg and C. C. Van Voorhis, Phys. Rev. 43, 315 (1933).
[Crossref]

1930 (2)

Collins, G.

W. C. Price and G. Collins, Phys. Rev. 48, 714 (1935).
[Crossref]

Harrison, G. R.

Hopfield, J. J.

J. J. Hopfield, Phys. Rev. 36, 789(A) (1930).

Ladenburg, R.

R. Ladenburg and C. C. Van Voorhis, Phys. Rev. 43, 315 (1933).
[Crossref]

Leighton, P. A.

Lyman, T.

T. Lyman, Phys. Rev. 48, 149 (1935).
[Crossref]

T. Lyman, Spectroscopy of the Extreme Ultraviolet (Longmans, Green and Company, 1928).

Messner, R. H.

R. H. Messner, Zeits. f. Physik 85, 727 (1933).
[Crossref]

Price, W. C.

W. C. Price and G. Collins, Phys. Rev. 48, 714 (1935).
[Crossref]

Schneider, E. G.

E. G. Schneider, J. Chem. Phys. 5, 106 (1937).
[Crossref]

Van Voorhis, C. C.

R. Ladenburg and C. C. Van Voorhis, Phys. Rev. 43, 315 (1933).
[Crossref]

J. Chem. Phys. (1)

E. G. Schneider, J. Chem. Phys. 5, 106 (1937).
[Crossref]

J. Opt. Soc. Am. (1)

Phys. Rev. (4)

W. C. Price and G. Collins, Phys. Rev. 48, 714 (1935).
[Crossref]

J. J. Hopfield, Phys. Rev. 36, 789(A) (1930).

T. Lyman, Phys. Rev. 48, 149 (1935).
[Crossref]

R. Ladenburg and C. C. Van Voorhis, Phys. Rev. 43, 315 (1933).
[Crossref]

Zeits. f. Physik (1)

R. H. Messner, Zeits. f. Physik 85, 727 (1933).
[Crossref]

Other (1)

T. Lyman, Spectroscopy of the Extreme Ultraviolet (Longmans, Green and Company, 1928).

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Figures (1)

Fig. 1
Fig. 1

Spectra taken through 200 cm of air at indicated pressures. Pressure about 10−5 mm for comparison exposures.

Tables (1)

Tables Icon

Table I The absorption coefficient per centimeter of air at 0°C and 760 mm pressure. Wave-lengths in angstroms.