Abstract

<p>The number of Ge I Ritz standards below 2000 Å has now been increased to approximately 100 lines with estimated uncertainties not exceeding 0.0009 Å, 68 of which have estimated uncertainties of 0.0003 Å. This extension is the end product of a systematic Fabry—Perot interferometric investigation which has extended the former interferometric region of 2019–4685 Å to 12 069 Å. Ninety-five interferometrically determined levels of Ge I are given, 72 of which have been improved by this effort.</p><p>Twenty-three lines of Ge II were also measured interferometrically leading to 20 improved energy levels of this spectrum and to estimated splittings of the <i>ng</i><sup>2</sup><i>G</i> (<i>n</i> = 5, 6, 7) terms. From the improved levels, twelve Ge II Ritz standards from 999 to 1966 Å have been calculated with estimated uncertainties not exceeding 0.0009 Å. An improved series limit of Ge II calculated from the <i>n</i>ƒ<sup>2</sup><i>F</i> and <i>ng</i><sup>2</sup><i>G</i> term series is 128 521.3 cm<sup>-l</sup>. This value made use of improved levels of this work and as yet unpublished data furnished by Shenstone.</p>

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  1. R. D. VanVeld and K. W. Meissner, J. Opt. Soc. Am. 46, 598 (1956).
  2. K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 48, 31 (1958).
  3. Quarterly Report, Foundational Research Projects NOLC Corona (Oct.–Dec. 1961).
  4. G. V. Deverall, K. W. Meissner, and G. J. Zissis, Phys. Rev. 95, 1463 (1954).
  5. P. G. Wilkinson and K. L. Andrew, J. Opt. Soc. Am. (to be published).
  6. K . L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 146 (1959).
  7. Kodak 103aF, I-N, I-M, and I-Z plates were used, the latter two types being hypersensitized according to the recommendations of the manufacturer.
  8. V. Kaufman, J. Opt. Soc. Am. 52, 870 (1962).
  9. S. Emara, J. Research Natl. Bur. Standards 65A, 473 (1961).
  10. M. L. Kuder, J. Research Natl. Bur. Standards 65C, 1 (1961).
  11. W . F. Meggers and C. J. Humphreys, J. Research Natl. Bur. Standards 18, 543 (1937).
  12. K. W. Meissner, J. Opt. Soc. Am. 31, 405 (1941).
  13. K. W. Meissner, R. D. Van Veld, and P. G. Wilkinson, J. Opt. Soc. Am. 48, 1001 (1958).
  14. K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 1086 (1959).
  15. C. E. Moore, Atomic Energy Levels (U. S. Government Printing Office, Washington, D. C., 1952), National Bureau of Standards Circ. 467, Vol. II.

Andrew, K . L.

K . L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 146 (1959).

Andrew, K. L.

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 48, 31 (1958).

P. G. Wilkinson and K. L. Andrew, J. Opt. Soc. Am. (to be published).

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 1086 (1959).

Deverall, G. V.

G. V. Deverall, K. W. Meissner, and G. J. Zissis, Phys. Rev. 95, 1463 (1954).

Emara, S.

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

Humphreys, C. J.

W . F. Meggers and C. J. Humphreys, J. Research Natl. Bur. Standards 18, 543 (1937).

Kaufman, V.

V. Kaufman, J. Opt. Soc. Am. 52, 870 (1962).

Kuder, M. L.

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

Meggers, W . F.

W . F. Meggers and C. J. Humphreys, J. Research Natl. Bur. Standards 18, 543 (1937).

Meissner, K. W.

K . L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 146 (1959).

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

K. W. Meissner, R. D. Van Veld, and P. G. Wilkinson, J. Opt. Soc. Am. 48, 1001 (1958).

G. V. Deverall, K. W. Meissner, and G. J. Zissis, Phys. Rev. 95, 1463 (1954).

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 48, 31 (1958).

R. D. VanVeld and K. W. Meissner, J. Opt. Soc. Am. 46, 598 (1956).

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 1086 (1959).

Moore, C. E.

C. E. Moore, Atomic Energy Levels (U. S. Government Printing Office, Washington, D. C., 1952), National Bureau of Standards Circ. 467, Vol. II.

Van Veld, R. D.

K. W. Meissner, R. D. Van Veld, and P. G. Wilkinson, J. Opt. Soc. Am. 48, 1001 (1958).

VanVeld, R. D.

R. D. VanVeld and K. W. Meissner, J. Opt. Soc. Am. 46, 598 (1956).

Wilkinson, P. G.

P. G. Wilkinson and K. L. Andrew, J. Opt. Soc. Am. (to be published).

K. W. Meissner, R. D. Van Veld, and P. G. Wilkinson, J. Opt. Soc. Am. 48, 1001 (1958).

Zissis, G. J.

G. V. Deverall, K. W. Meissner, and G. J. Zissis, Phys. Rev. 95, 1463 (1954).

Other (15)

R. D. VanVeld and K. W. Meissner, J. Opt. Soc. Am. 46, 598 (1956).

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 48, 31 (1958).

Quarterly Report, Foundational Research Projects NOLC Corona (Oct.–Dec. 1961).

G. V. Deverall, K. W. Meissner, and G. J. Zissis, Phys. Rev. 95, 1463 (1954).

P. G. Wilkinson and K. L. Andrew, J. Opt. Soc. Am. (to be published).

K . L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 146 (1959).

Kodak 103aF, I-N, I-M, and I-Z plates were used, the latter two types being hypersensitized according to the recommendations of the manufacturer.

V. Kaufman, J. Opt. Soc. Am. 52, 870 (1962).

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

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

W . F. Meggers and C. J. Humphreys, J. Research Natl. Bur. Standards 18, 543 (1937).

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

K. W. Meissner, R. D. Van Veld, and P. G. Wilkinson, J. Opt. Soc. Am. 48, 1001 (1958).

K. L. Andrew and K. W. Meissner, J. Opt. Soc. Am. 49, 1086 (1959).

C. E. Moore, Atomic Energy Levels (U. S. Government Printing Office, Washington, D. C., 1952), National Bureau of Standards Circ. 467, Vol. II.

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