Abstract

New vacuum wavelengths for nine lines of He i in the near ultraviolet and visible regions are given. They were obtained by measurement relative to 5462.2707 A and 4359.5625 A of Hg198i with an evacuated Fabry-Perot interferometer. Liquid-nitrogen cooled helium lamps were used. Interference fringes were obtained for the helium line 5017 A with spacers up to 50 mm in length. The wavelength of this line, which was used as a reference wavelength in some previous work on the Rydberg constant, is found to be 5017.0772±0.0003 A (vac.) relative to the stated values for the two standards.

© 1960 Optical Society of America

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References

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  1. W. V. Houston, Phys. Rev. 30, 608 (1927).
    [CrossRef]
  2. P. W. Merrill, (1917); Astrophys. J. 46, 357 (1917).
  3. D. Y. Chu, Phys. Rev. 55, 175 (1939).
    [CrossRef]
  4. Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).
  5. E. R. Cohen, Phys. Rev. 88, 353 (1952).
    [CrossRef]
  6. F. H. Rolt and H. Barrell, Proc. Roy. Soc. (London) A122, 131 (1929).
  7. Trans. Intern. Astron. Union 9, 201 (1957).
  8. Trans. Intern. Astron. Union10, (to be published).
  9. Wavelengths taken from an unpublished list of preliminary vacuum measurements against the 6440.2491 Cd standard.
  10. W. F. Meggers and F. O. Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
    [CrossRef]
  11. K. Burns and K. B. Adams, J. Opt. Soc. Am. 43, 1020 (1953).
    [CrossRef]
  12. B. Edlén, J. Opt. Soc. Am. 43, 339 (1953).
    [CrossRef]
  13. A. Pérard, Rev. opt. 7, 1 (1928).
  14. G. W. Series and J. C. Field, Proceedings of Symposium on Interferometry, National Physical Laboratory, Teddington, England, June, 1959 (to be published).
  15. Houston and Chu, (in press).

1957 (1)

Trans. Intern. Astron. Union 9, 201 (1957).

1953 (2)

1952 (1)

E. R. Cohen, Phys. Rev. 88, 353 (1952).
[CrossRef]

1950 (1)

W. F. Meggers and F. O. Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
[CrossRef]

1940 (1)

Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).

1939 (1)

D. Y. Chu, Phys. Rev. 55, 175 (1939).
[CrossRef]

1929 (1)

F. H. Rolt and H. Barrell, Proc. Roy. Soc. (London) A122, 131 (1929).

1928 (1)

A. Pérard, Rev. opt. 7, 1 (1928).

1927 (1)

W. V. Houston, Phys. Rev. 30, 608 (1927).
[CrossRef]

Adams, K. B.

Barrell, H.

F. H. Rolt and H. Barrell, Proc. Roy. Soc. (London) A122, 131 (1929).

Burns, K.

Chu,

Houston and Chu, (in press).

Chu, D. Y.

D. Y. Chu, Phys. Rev. 55, 175 (1939).
[CrossRef]

Cohen, E. R.

E. R. Cohen, Phys. Rev. 88, 353 (1952).
[CrossRef]

Drinkwater,

Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).

Edlén, B.

Field, J. C.

G. W. Series and J. C. Field, Proceedings of Symposium on Interferometry, National Physical Laboratory, Teddington, England, June, 1959 (to be published).

Houston,

Houston and Chu, (in press).

Houston, W. V.

W. V. Houston, Phys. Rev. 30, 608 (1927).
[CrossRef]

Meggers, W. F.

W. F. Meggers and F. O. Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
[CrossRef]

Merrill, P. W.

P. W. Merrill, (1917); Astrophys. J. 46, 357 (1917).

Pérard, A.

A. Pérard, Rev. opt. 7, 1 (1928).

Richardson,

Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).

Rolt, F. H.

F. H. Rolt and H. Barrell, Proc. Roy. Soc. (London) A122, 131 (1929).

Series, G. W.

G. W. Series and J. C. Field, Proceedings of Symposium on Interferometry, National Physical Laboratory, Teddington, England, June, 1959 (to be published).

Westfall, F. O.

W. F. Meggers and F. O. Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
[CrossRef]

Williams,

Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).

J. Opt. Soc. Am. (2)

J. Research Natl. Bur. Standards (1)

W. F. Meggers and F. O. Westfall, J. Research Natl. Bur. Standards 44, 447 (1950).
[CrossRef]

Phys. Rev. (3)

W. V. Houston, Phys. Rev. 30, 608 (1927).
[CrossRef]

D. Y. Chu, Phys. Rev. 55, 175 (1939).
[CrossRef]

E. R. Cohen, Phys. Rev. 88, 353 (1952).
[CrossRef]

Proc. Roy. Soc. (London) (2)

F. H. Rolt and H. Barrell, Proc. Roy. Soc. (London) A122, 131 (1929).

Drinkwater, Richardson, and Williams, Proc. Roy. Soc. (London) A174, 164 (1940).

Rev. opt. (1)

A. Pérard, Rev. opt. 7, 1 (1928).

Trans. Intern. Astron. Union (1)

Trans. Intern. Astron. Union 9, 201 (1957).

Other (5)

Trans. Intern. Astron. Union10, (to be published).

Wavelengths taken from an unpublished list of preliminary vacuum measurements against the 6440.2491 Cd standard.

P. W. Merrill, (1917); Astrophys. J. 46, 357 (1917).

G. W. Series and J. C. Field, Proceedings of Symposium on Interferometry, National Physical Laboratory, Teddington, England, June, 1959 (to be published).

Houston and Chu, (in press).

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Figures (1)

Fig. 1
Fig. 1

Indicated wavelength corrections due to phase dispersion of the aluminum films on the etalon plates. The points were obtained from the average calculated wavelengths for a 20 mm spacer.

Tables (2)

Tables Icon

Table I Wavelengths of some useful lines emitted by the Hg-198 lamp with argon as carrier-gas. Authorities for these wavelengths are given in the text. Under “No. Obs.” appears the number of observations of each line with the 20-mm etalon.

Tables Icon

Table II Measurements of some He i wavelengths. Intensities are from the MIT wavelength tables. The present measurements appear under “λ(vac)” and are followed by the total number of observations (in parentheses) and the length in mm of the longest etalon for which interference patterns were measured.