Abstract

Accurate wavelengths and wavenumbers of over 22 000 dysprosium lines have been measured in the wavelength region 2300–11 400 Å. The Zeeman effect has been observed at a field strength of 24 000 G from 2300 to 9000 Å. By comparison of relative intensities of the lines from sources under various conditions, 85% of the lines have been assigned as Dy i or Dy ii spectrum lines. From the energy-level analysis, 141 even and 197 odd levels of Dy i are known. Combinations between these levels account for 1952 lines. For Dy ii, 14 even and 214 odd levels are known, with 1000 lines classified. The ground levels of Dy i and Dy ii are 4f106s2 5I8 and 4f106sI812, respectively. The lowest level of the 4f95d6s2 configuration of Dy i lies 7565.62 cm−1 above the ground level. The g values for most of the levels of both spectra are given.

© 1971 Optical Society of America

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References

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  1. E. Paulson, Astrophys. J. 40, 298 (1914).
    [Crossref]
  2. W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
    [Crossref]
  3. Transactions of the Triple Commission for Spectroscopy, J. Opt. Soc. Am. 52, 478 (1962).
  4. K. F. Smith and I. J. Spalding, Proc. Roy. Soc. (London) A265, 133 (1961);A. Y. Cabezas, I. Lindgren, and R. Marrus, Phys. Rev. 122, 1796 (1961).
    [Crossref]
  5. J. M. Blank, thesis, Massachusetts Institute of Technology, June, 1952.
  6. A. S. King, Astrophys. J. 72, 221 (1930).
    [Crossref]
  7. A. S. King and C. E. Moore, Astrophys. J. 98, 33 (1943).
    [Crossref]
  8. A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
    [Crossref]
  9. W. F. Meggers, C. H. Corliss, and B. H. Scribner, Tables of Spectral-Line Intensities (U. S. Govt. Printing Office, Washington, D. C., 1961), and references cited therein.
  10. F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 47, 1087 (1957).
    [Crossref]
  11. E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).
    [Crossref]
  12. F. S. Tomkins and M. Fred, Spectrochim. Acta 6, 139 (1954).
    [Crossref]
  13. F. S. Tomkins and M. Fred, Appl. Opt. 2, 715 (1963).
    [Crossref]
  14. S. P. Davis and J. G. Phillips, The Red System of the CN Molecule (University of California Press, Berkeley, 1963).
  15. M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 41, 641 (1951).
    [Crossref]
  16. W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U. S.) 61A, 95 (1958).
  17. A. Giacchetti, J. Opt. Soc. Am. 56, 653 (1966).
    [Crossref]
  18. A. Giacchetti, J. Opt. Soc. Am. 57, 728 (1967).
    [Crossref]
  19. J. Reader and S. P. Davis, J. Res. Nat]. Bur. Std. (U. S.) 71A, 587 (1967).
    [Crossref]
  20. M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 47, 1076 (1957).
    [Crossref]
  21. We are indebted to M. Fred of Argonne National Laboratory for the computer program for least-squares reduction of the Zeeman data.
  22. K. L. Vander Sluis, J. Opt. Soc. Am. 46, 605 (1956).
    [Crossref]
  23. J. G. Conway and B. G. Wybourne, Phys. Rev. 130, 2325 (1963).
    [Crossref]
  24. Our search programs were obtained from the National Bureau of Standards. They were originally written by G. Racah for the analysis of complex spectra.
  25. R. J. Mehlhorn, thesis, University of California, UCRL-18040, 1968.
  26. C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and fn Configurations (M. I. T. Press, Cambridge, Mass., 1963).
  27. B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
    [Crossref]
  28. C. Arnoult and S. Gerstenkorn, J. Opt. Soc. Am. 56, 177 (1966).
    [Crossref]
  29. J. Sugar and J. Reader, J. Opt. Soc. Am. 55, 1286 (1965).
    [Crossref]
  30. B. G. Wybourne, Spectroscopic Properties of Rare Earths (Wiley, New York, 1965), p. 56.
  31. Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Talmi, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).
  32. K. L. Vander Sluis and J. R. McNally, J. Opt. Soc. Am. 60, 1209 (1970).
    [Crossref]
  33. Tables of the classified levels of Dy i and ii are available from the National Technical Information Service (NTIS), Springfield, Va. 22151. The report is identified as UCRL-19944.

1970 (2)

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

K. L. Vander Sluis and J. R. McNally, J. Opt. Soc. Am. 60, 1209 (1970).
[Crossref]

1967 (2)

A. Giacchetti, J. Opt. Soc. Am. 57, 728 (1967).
[Crossref]

J. Reader and S. P. Davis, J. Res. Nat]. Bur. Std. (U. S.) 71A, 587 (1967).
[Crossref]

1966 (2)

1965 (1)

1963 (3)

1962 (1)

Transactions of the Triple Commission for Spectroscopy, J. Opt. Soc. Am. 52, 478 (1962).

1961 (2)

K. F. Smith and I. J. Spalding, Proc. Roy. Soc. (London) A265, 133 (1961);A. Y. Cabezas, I. Lindgren, and R. Marrus, Phys. Rev. 122, 1796 (1961).
[Crossref]

B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
[Crossref]

1958 (1)

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U. S.) 61A, 95 (1958).

1957 (2)

1956 (1)

1954 (1)

F. S. Tomkins and M. Fred, Spectrochim. Acta 6, 139 (1954).
[Crossref]

1951 (1)

1943 (1)

A. S. King and C. E. Moore, Astrophys. J. 98, 33 (1943).
[Crossref]

1942 (1)

W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
[Crossref]

1930 (1)

A. S. King, Astrophys. J. 72, 221 (1930).
[Crossref]

1914 (1)

E. Paulson, Astrophys. J. 40, 298 (1914).
[Crossref]

Arnoult, C.

Blank, J. M.

J. M. Blank, thesis, Massachusetts Institute of Technology, June, 1952.

Conway, J. G.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

J. G. Conway and B. G. Wybourne, Phys. Rev. 130, 2325 (1963).
[Crossref]

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).
[Crossref]

Corliss, C. H.

W. F. Meggers, C. H. Corliss, and B. H. Scribner, Tables of Spectral-Line Intensities (U. S. Govt. Printing Office, Washington, D. C., 1961), and references cited therein.

Davis, S. P.

J. Reader and S. P. Davis, J. Res. Nat]. Bur. Std. (U. S.) 71A, 587 (1967).
[Crossref]

S. P. Davis and J. G. Phillips, The Red System of the CN Molecule (University of California Press, Berkeley, 1963).

Fred, M.

Gerstenkorn, S.

Giacchetti, A.

Goldschmidt, Z. B.

Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Talmi, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).

Gutmacher, R. G.

Judd, B. R.

B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
[Crossref]

King, A. S.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

A. S. King and C. E. Moore, Astrophys. J. 98, 33 (1943).
[Crossref]

A. S. King, Astrophys. J. 72, 221 (1930).
[Crossref]

Koster, G. F.

C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and fn Configurations (M. I. T. Press, Cambridge, Mass., 1963).

Lindgren, I.

B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
[Crossref]

McNally, J. R.

Meggers, W. F.

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U. S.) 61A, 95 (1958).

W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
[Crossref]

W. F. Meggers, C. H. Corliss, and B. H. Scribner, Tables of Spectral-Line Intensities (U. S. Govt. Printing Office, Washington, D. C., 1961), and references cited therein.

Mehlhorn, R. J.

R. J. Mehlhorn, thesis, University of California, UCRL-18040, 1968.

Moore, C. E.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

A. S. King and C. E. Moore, Astrophys. J. 98, 33 (1943).
[Crossref]

Nielson, C. W.

C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and fn Configurations (M. I. T. Press, Cambridge, Mass., 1963).

Paulson, E.

E. Paulson, Astrophys. J. 40, 298 (1914).
[Crossref]

Phillips, J. G.

S. P. Davis and J. G. Phillips, The Red System of the CN Molecule (University of California Press, Berkeley, 1963).

Reader, J.

J. Reader and S. P. Davis, J. Res. Nat]. Bur. Std. (U. S.) 71A, 587 (1967).
[Crossref]

J. Sugar and J. Reader, J. Opt. Soc. Am. 55, 1286 (1965).
[Crossref]

Scribner, B. H.

W. F. Meggers, C. H. Corliss, and B. H. Scribner, Tables of Spectral-Line Intensities (U. S. Govt. Printing Office, Washington, D. C., 1961), and references cited therein.

Smith, K. F.

K. F. Smith and I. J. Spalding, Proc. Roy. Soc. (London) A265, 133 (1961);A. Y. Cabezas, I. Lindgren, and R. Marrus, Phys. Rev. 122, 1796 (1961).
[Crossref]

Spalding, I. J.

K. F. Smith and I. J. Spalding, Proc. Roy. Soc. (London) A265, 133 (1961);A. Y. Cabezas, I. Lindgren, and R. Marrus, Phys. Rev. 122, 1796 (1961).
[Crossref]

Stanley, R. W.

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U. S.) 61A, 95 (1958).

Sugar, J.

Tomkins, F. S.

Vander Sluis, K. L.

Worden, E. F.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).
[Crossref]

Wybourne, B. G.

J. G. Conway and B. G. Wybourne, Phys. Rev. 130, 2325 (1963).
[Crossref]

B. G. Wybourne, Spectroscopic Properties of Rare Earths (Wiley, New York, 1965), p. 56.

Appl. Opt. (2)

Astrophys. J. (3)

E. Paulson, Astrophys. J. 40, 298 (1914).
[Crossref]

A. S. King, Astrophys. J. 72, 221 (1930).
[Crossref]

A. S. King and C. E. Moore, Astrophys. J. 98, 33 (1943).
[Crossref]

J. Opt. Soc. Am. (10)

J. Res. Nat]. Bur. Std. (U. S.) (1)

J. Reader and S. P. Davis, J. Res. Nat]. Bur. Std. (U. S.) 71A, 587 (1967).
[Crossref]

J. Res. Natl. Bur. Std. (U. S.) (1)

W. F. Meggers and R. W. Stanley, J. Res. Natl. Bur. Std. (U. S.) 61A, 95 (1958).

Natl. Bur. Std. (U. S.) (1)

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, Natl. Bur. Std. (U. S.) 74A, 355 (1970).
[Crossref]

Phys. Rev. (2)

B. R. Judd and I. Lindgren, Phys. Rev. 122, 1802 (1961).
[Crossref]

J. G. Conway and B. G. Wybourne, Phys. Rev. 130, 2325 (1963).
[Crossref]

Proc. Roy. Soc. (London) (1)

K. F. Smith and I. J. Spalding, Proc. Roy. Soc. (London) A265, 133 (1961);A. Y. Cabezas, I. Lindgren, and R. Marrus, Phys. Rev. 122, 1796 (1961).
[Crossref]

Rev. Mod. Phys. (1)

W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
[Crossref]

Spectrochim. Acta (1)

F. S. Tomkins and M. Fred, Spectrochim. Acta 6, 139 (1954).
[Crossref]

Other (10)

S. P. Davis and J. G. Phillips, The Red System of the CN Molecule (University of California Press, Berkeley, 1963).

J. M. Blank, thesis, Massachusetts Institute of Technology, June, 1952.

W. F. Meggers, C. H. Corliss, and B. H. Scribner, Tables of Spectral-Line Intensities (U. S. Govt. Printing Office, Washington, D. C., 1961), and references cited therein.

Our search programs were obtained from the National Bureau of Standards. They were originally written by G. Racah for the analysis of complex spectra.

R. J. Mehlhorn, thesis, University of California, UCRL-18040, 1968.

C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and fn Configurations (M. I. T. Press, Cambridge, Mass., 1963).

We are indebted to M. Fred of Argonne National Laboratory for the computer program for least-squares reduction of the Zeeman data.

Tables of the classified levels of Dy i and ii are available from the National Technical Information Service (NTIS), Springfield, Va. 22151. The report is identified as UCRL-19944.

B. G. Wybourne, Spectroscopic Properties of Rare Earths (Wiley, New York, 1965), p. 56.

Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Talmi, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).

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Figures (2)

F. 1
F. 1

Types of Zeeman patterns and formulas for the determination of g values from unresolved patterns. Type A; J1J2 but could not determine which g was largest. Type P; pattern perturbed.

F. 2
F. 2

Energy-level plot of the 5I term of Dy i and 6I and 4I terms of Dy ii, showing the effect of removing the s electron from the 4f96s2 configuration.

Tables (7)

Tables Icon

Table I Observed and calculated energy levels, g values, and eigenvector composition for the 5I term of the 4f106s2 configuration of Dy i.

Tables Icon

Table II Observed and calculated energy levels, and eigenvector compositions for 12 levels of the 4f95d6s2 configuration of Dy i.

Tables Icon

Table III Energy levels of Dy i.

Tables Icon

Table IV Classified lines of Dy i.a

Tables Icon

Table V Observed and calculated energy levels, g values, and eigenvector compositions for 12 levels of the 4f106s configuration of Dy ii.

Tables Icon

Table VI Energy levels of Dy ii.

Tables Icon

Table VII Classified lines of Dy ii.a

Equations (15)

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rms dev . = ( i Δ 2 / N K ) 1 2
rms dev . = ( i Δ 2 / N K ) 1 2
8 1 2
7 1 2
7 1 2
6 1 2
5 1 2
6 1 2
4 1 2
5 1 2
3 1 2
4 1 2
5 1 2
4 1 2
rms dev . = ( i Δ 2 / N K ) 1 2