Abstract

The vacuum wavelengths of 27 lines of Hg<sup>198</sup> and 6 lines of Kr<sup>86</sup>have been measured relative to the international standard of length, the Kr<sup>86</sup> line at 6057.80211 Å, by photographic Fabry-Perot interferometry. These measurements were made with Hg<sup>198</sup> electrodeless lamps containing argon at pressures of ¼, 3, and 10 mm Hg and a Kr<sup>86</sup> hot-cathode lamp operated according to the conditions prescribed by the International Conference on Weights and Measures in 1960. Energy-level values have been derived from the wavelengths of each of the Hg<sup>198</sup> sources, and on the basis of these values, the energy level and wavelength shifts per unit pressure of argon have been calculated. The suitability of the Hg<sup>198</sup> electrodeless lamp as a source of wavelength standards for interferometric measurement of length and wavelength is discussed.

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  1. Comité Intern. des Poids et Mesures, Procès-Verbaux des Séances, 2° série (1960) (to be published).
  2. K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 507 (1962).
  3. E. Engelhard and J. Terrien, Rev. opt. 39, 11 (1960).
  4. C. F. Bruce and R. M. Hill, Australian J. Phys. 14, 64 (1961).
  5. Comité Intern; des Poids et Mesures, Procès-Verbaux des Séances, 2° série (1961) (to be published).
  6. William F. Meggers and F. Oliver Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
  7. William F. Meggers and Karl G. Kessler, J. Opt. Soc. Am. 40, 737 (1950).
  8. Keivin Burns and Kenneth B. Adams, J. Opt. Soc. Am. 42, 56 (1952).
  9. E. Engelhard, Comité Intern. des Poids et Mesures, Procès-Verbaux des Séances, 2° série, tome 26-B (1958).
  10. J. Terrien, Compt. rend. 246, 2362 (1958).
  11. K. M. Baird and D. S. Smith, Can. J. Phys. 37, 832 (1959).
  12. V. Kaufman, unpublished thesis, Purdue University (1959).
  13. J. Terrien, Trans. IAU (1961) (to be published)
  14. R. L. Barger anti K. G. Kessler, J. Opt. Soc. Am. 51, 827 (1961).
  15. M. L. Kuder, J. Research Natl. Bur. Standards 65C, 1 (1961).
  16. K. W. Meissner, J. Opt. Soc. Am. 31, 405 (1941).
  17. R. L. Barger and K. G. Kessler, J. Opt. Soc. Am. 50, 651 (1960).
  18. The last digit, when written as a subindex, indicates that the error in the figure may be as great as 5, but there is high confidence it is no greater than 10.
  19. W. G. Schweitzer, J. Opt. Soc. Am. 51, 1466 (1961).
  20. K. G. Kessler and W. G. Schweitzer, J. Opt. Soc. Am. 49, 199 (1959).
  21. Trans. IAU (1961, to be published).
  22. D. H. Rank, J. M. Bennett, and H. E. Bennett, J. Opt. Soc. Am. 46, 477 (1956).
  23. C. J. Humphreys and E. Paul, Jr. NOLC Rept. 464 (April–June 1959).
  24. S. Emara, J. Research Natl. Bur. Standards 65A, 473 (1961).

Adams, Kenneth B.

Keivin Burns and Kenneth B. Adams, J. Opt. Soc. Am. 42, 56 (1952).

Baird, K. M.

K. M. Baird and D. S. Smith, Can. J. Phys. 37, 832 (1959).

K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 507 (1962).

Barger, R. L.

R. L. Barger anti K. G. Kessler, J. Opt. Soc. Am. 51, 827 (1961).

R. L. Barger and K. G. Kessler, J. Opt. Soc. Am. 50, 651 (1960).

Bennett, H. E.

D. H. Rank, J. M. Bennett, and H. E. Bennett, J. Opt. Soc. Am. 46, 477 (1956).

Bennett, J. M.

D. H. Rank, J. M. Bennett, and H. E. Bennett, J. Opt. Soc. Am. 46, 477 (1956).

Bruce, C. F.

C. F. Bruce and R. M. Hill, Australian J. Phys. 14, 64 (1961).

Burns, Keivin

Keivin Burns and Kenneth B. Adams, J. Opt. Soc. Am. 42, 56 (1952).

Emara, S.

S. Emara, J. Research Natl. Bur. Standards 65A, 473 (1961).

Engelhard, E.

E. Engelhard and J. Terrien, Rev. opt. 39, 11 (1960).

E. Engelhard, Comité Intern. des Poids et Mesures, Procès-Verbaux des Séances, 2° série, tome 26-B (1958).

Hill, R. M.

C. F. Bruce and R. M. Hill, Australian J. Phys. 14, 64 (1961).

Humphreys, C. J.

C. J. Humphreys and E. Paul, Jr. NOLC Rept. 464 (April–June 1959).

Kaufman, V.

V. Kaufman, unpublished thesis, Purdue University (1959).

Kessler, K. G.

R. L. Barger and K. G. Kessler, J. Opt. Soc. Am. 50, 651 (1960).

K. G. Kessler and W. G. Schweitzer, J. Opt. Soc. Am. 49, 199 (1959).

R. L. Barger anti K. G. Kessler, J. Opt. Soc. Am. 51, 827 (1961).

Kessler, Karl G.

William F. Meggers and Karl G. Kessler, J. Opt. Soc. Am. 40, 737 (1950).

Kuder, M. L.

M. L. Kuder, J. Research Natl. Bur. Standards 65C, 1 (1961).

Meggers, William F.

William F. Meggers and Karl G. Kessler, J. Opt. Soc. Am. 40, 737 (1950).

William F. Meggers and F. Oliver Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).

Meissner, K. W.

K. W. Meissner, J. Opt. Soc. Am. 31, 405 (1941).

Paul, Jr., E.

C. J. Humphreys and E. Paul, Jr. NOLC Rept. 464 (April–June 1959).

Rank, D. H.

D. H. Rank, J. M. Bennett, and H. E. Bennett, J. Opt. Soc. Am. 46, 477 (1956).

Schweitzer, W. G.

K. G. Kessler and W. G. Schweitzer, J. Opt. Soc. Am. 49, 199 (1959).

W. G. Schweitzer, J. Opt. Soc. Am. 51, 1466 (1961).

Smith, D. S.

K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 507 (1962).

K. M. Baird and D. S. Smith, Can. J. Phys. 37, 832 (1959).

Terrien, J.

J. Terrien, Trans. IAU (1961) (to be published)

J. Terrien, Compt. rend. 246, 2362 (1958).

E. Engelhard and J. Terrien, Rev. opt. 39, 11 (1960).

Westfall, F. Oliver

William F. Meggers and F. Oliver Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).

Other (24)

Comité Intern. des Poids et Mesures, Procès-Verbaux des Séances, 2° série (1960) (to be published).

K. M. Baird and D. S. Smith, J. Opt. Soc. Am. 52, 507 (1962).

E. Engelhard and J. Terrien, Rev. opt. 39, 11 (1960).

C. F. Bruce and R. M. Hill, Australian J. Phys. 14, 64 (1961).

Comité Intern; des Poids et Mesures, Procès-Verbaux des Séances, 2° série (1961) (to be published).

William F. Meggers and F. Oliver Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).

William F. Meggers and Karl G. Kessler, J. Opt. Soc. Am. 40, 737 (1950).

Keivin Burns and Kenneth B. Adams, J. Opt. Soc. Am. 42, 56 (1952).

E. Engelhard, Comité Intern. des Poids et Mesures, Procès-Verbaux des Séances, 2° série, tome 26-B (1958).

J. Terrien, Compt. rend. 246, 2362 (1958).

K. M. Baird and D. S. Smith, Can. J. Phys. 37, 832 (1959).

V. Kaufman, unpublished thesis, Purdue University (1959).

J. Terrien, Trans. IAU (1961) (to be published)

R. L. Barger anti K. G. Kessler, J. Opt. Soc. Am. 51, 827 (1961).

M. L. Kuder, J. Research Natl. Bur. Standards 65C, 1 (1961).

K. W. Meissner, J. Opt. Soc. Am. 31, 405 (1941).

R. L. Barger and K. G. Kessler, J. Opt. Soc. Am. 50, 651 (1960).

The last digit, when written as a subindex, indicates that the error in the figure may be as great as 5, but there is high confidence it is no greater than 10.

W. G. Schweitzer, J. Opt. Soc. Am. 51, 1466 (1961).

K. G. Kessler and W. G. Schweitzer, J. Opt. Soc. Am. 49, 199 (1959).

Trans. IAU (1961, to be published).

D. H. Rank, J. M. Bennett, and H. E. Bennett, J. Opt. Soc. Am. 46, 477 (1956).

C. J. Humphreys and E. Paul, Jr. NOLC Rept. 464 (April–June 1959).

S. Emara, J. Research Natl. Bur. Standards 65A, 473 (1961).

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