Abstract

The curium spectrum emitted by electrodeless lamps was observed from 2400 to 11 500 Å and the wavelengths of over 13250 lines were accurately measured. Zeeman effect and spectrum-assignment plates were photographed from 2400 to 9000 Å. From data obtained on the spectrum-assignment plates, over 6800 lines were assigned to Cm I and over 4050 lines were assigned to the Cm II spectrum. The analysis of the Cm I spectrum has produced 335 odd levels and 348 even levels that combine to classify over 5025 Cm lines. Only the energy levels are presented here. The Landé g values of most levels have been obtained from the Zeeman effect data and isotope shifts were determined for many levels. These data were useful in the assignment of levels to electronic configurations of Cm I. The ground configuration of Cm I is [Rn]5ƒ<sup>7</sup> 6d 7s<sup>2</sup> and the lowest level of the [Rn]5ƒ<sup>8</sup>7s<sup>2</sup> configuration is only 1214 cm-<sup>1</sup> above the ground level.

© 1976 Optical Society of America

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  1. G. T. Seaborg, R. A. James, and A. Ghiorso, "The new element curium (atomic number 96)" in The Transuranium Elements: Research Papers, Vol. 14B, Paper 22.2 (MacGraw-Hill, New York, 1949), p. 1554.
  2. J. G. Conway, W. F. Moore, and W. T. Crane, J. Am. Chem. Soc. 73, 1308 (1951).
  3. J. G. Conway and R. D. McLaughlin, J. Opt. Soc. Am. 46, 91 (1956).
  4. R. H. Gaddy, Appl. Spectrosc. 26, 49 (1972).
  5. J. C. Hubbs, R. Marrus, and J. O. Winocur, Phys. Rev. 114, 586 (1959).
  6. E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).
  7. J. Sugar, J. Chem. Phys. 59, 788 (1973); 60, 4103 (1974).
  8. W. F. Meggers, J. Opt. Soc. Am. 50, 405 (1960).
  9. F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 47, 1087 (1957).
  10. E. F. Worden, R. G. Gutmacher, and J. G. Conway, Appl. Opt. 2, 707 (1963).
  11. F. S. Tomkins and M. Fred, Appl. Opt. 2, 715 (1963).
  12. J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).
  13. F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 41, 641 (1951).
  14. S. P. Davis and J. G. Phillips, The Red System (A 2.II–X2.Σ) of the CN Molecule, (University of California, Berkeley, 1963).
  15. W. C. Bentley, J. Inorg. Nucl. Chem. 30, 2007 (1968).
  16. R. G. Gutmacher of Lawrence Livermore Laboratory has compiled extensive line lists of 240.Pu as emitted by electrodeless lamps and observed on the ANL 9.15 m spectrograph.
  17. M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 47, 1076 (1957).
  18. A. Giacchetti, J. Opt. Soc. Am. 56, 653 (1966); 57, 728 (1967).
  19. L. C. Marquet and S. P. Davis, J. Opt. Soc. Am. 55, 471 (1965).
  20. J. Reader and S. P. Davis, J. Res. Nat. Bur. Stand., Sec. A 71, 587 (1967).
  21. P. F. A. Klinkenberg, Physica (Utrecht) 32, 113 (1966).
  22. K. L. Vander Sluis, J. Opt. Soc. Am. 46, 605 (1956).
  23. We are indebted to M. Fred of Argonne National Laboratory for the computer program for least-squares reduction of the Zeeman data.
  24. J. M. Blank, thesis, Massachusetts Institute of Technology, June, 1952.
  25. Our search programs were obtained from the National Bureau of Standards. They were originally written by G. Racah for the analysis of complex spectra.
  26. Mark Fred of Argonne National Laboratory estimated this value based on observations in other actinides.
  27. L. Brewer, J. Opt. Soc. Am. 61, 1666 (1971).
  28. H. N. Russell, Astrophys. J. 96, 11 (1942).
  29. We are indebted to H. M. Crosswhite of Argonne National Laboratory for performing the theoretical calculations on 5ƒ8.7s2. of Cm I.
  30. W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Bentley, W. C.

W. C. Bentley, J. Inorg. Nucl. Chem. 30, 2007 (1968).

Blank, J. M.

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

Brewer, L.

L. Brewer, J. Opt. Soc. Am. 61, 1666 (1971).

Carnall, W. T.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Cohen, D.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Conway, J. G.

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

J. G. Conway, W. F. Moore, and W. T. Crane, J. Am. Chem. Soc. 73, 1308 (1951).

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

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

J. G. Conway and R. D. McLaughlin, J. Opt. Soc. Am. 46, 91 (1956).

Crane, W. T.

J. G. Conway, W. F. Moore, and W. T. Crane, J. Am. Chem. Soc. 73, 1308 (1951).

Crosswhite, H. M.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Davis, S. P.

L. C. Marquet and S. P. Davis, J. Opt. Soc. Am. 55, 471 (1965).

J. Reader and S. P. Davis, J. Res. Nat. Bur. Stand., Sec. A 71, 587 (1967).

S. P. Davis and J. G. Phillips, The Red System (A 2.II–X2.Σ) of the CN Molecule, (University of California, Berkeley, 1963).

Fred, M.

M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 47, 1076 (1957).

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 41, 641 (1951).

F. S. Tomkins and M. Fred, Appl. Opt. 2, 715 (1963).

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 47, 1087 (1957).

Fried, S.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Gaddy, R. H.

R. H. Gaddy, Appl. Spectrosc. 26, 49 (1972).

Ghiorso, A.

G. T. Seaborg, R. A. James, and A. Ghiorso, "The new element curium (atomic number 96)" in The Transuranium Elements: Research Papers, Vol. 14B, Paper 22.2 (MacGraw-Hill, New York, 1949), p. 1554.

Giacchetti, A.

A. Giacchetti, J. Opt. Soc. Am. 56, 653 (1966); 57, 728 (1967).

Gutmacher, R. G.

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

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

R. G. Gutmacher of Lawrence Livermore Laboratory has compiled extensive line lists of 240.Pu as emitted by electrodeless lamps and observed on the ANL 9.15 m spectrograph.

Hubbs, J. C.

J. C. Hubbs, R. Marrus, and J. O. Winocur, Phys. Rev. 114, 586 (1959).

Hulet, E. K.

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

James, R. A.

G. T. Seaborg, R. A. James, and A. Ghiorso, "The new element curium (atomic number 96)" in The Transuranium Elements: Research Papers, Vol. 14B, Paper 22.2 (MacGraw-Hill, New York, 1949), p. 1554.

Klinkenberg, P. F. A.

P. F. A. Klinkenberg, Physica (Utrecht) 32, 113 (1966).

Lucas, P.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Marquet, L. C.

L. C. Marquet and S. P. Davis, J. Opt. Soc. Am. 55, 471 (1965).

Marrus, R.

J. C. Hubbs, R. Marrus, and J. O. Winocur, Phys. Rev. 114, 586 (1959).

McLaughlin, R. D.

J. G. Conway and R. D. McLaughlin, J. Opt. Soc. Am. 46, 91 (1956).

Meggers, W. F.

W. F. Meggers, J. Opt. Soc. Am. 50, 405 (1960).

Moore, W. F.

J. G. Conway, W. F. Moore, and W. T. Crane, J. Am. Chem. Soc. 73, 1308 (1951).

Pappalardo, R. G.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Phillips, J. G.

S. P. Davis and J. G. Phillips, The Red System (A 2.II–X2.Σ) of the CN Molecule, (University of California, Berkeley, 1963).

Racah, G.

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

Reader, J.

J. Reader and S. P. Davis, J. Res. Nat. Bur. Stand., Sec. A 71, 587 (1967).

Russell, H. N.

H. N. Russell, Astrophys. J. 96, 11 (1942).

Seaborg, G. T.

G. T. Seaborg, R. A. James, and A. Ghiorso, "The new element curium (atomic number 96)" in The Transuranium Elements: Research Papers, Vol. 14B, Paper 22.2 (MacGraw-Hill, New York, 1949), p. 1554.

Sluis, K. L. Vander

K. L. Vander Sluis, J. Opt. Soc. Am. 46, 605 (1956).

Sugar, J.

J. Sugar, J. Chem. Phys. 59, 788 (1973); 60, 4103 (1974).

Tomkins, F. S.

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 47, 1087 (1957).

F. S. Tomkins and M. Fred, Appl. Opt. 2, 715 (1963).

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 41, 641 (1951).

M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 47, 1076 (1957).

Wagner, Jr., F.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

Winocur, J. O.

J. C. Hubbs, R. Marrus, and J. O. Winocur, Phys. Rev. 114, 586 (1959).

Worden, E. F.

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

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

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

Other (30)

G. T. Seaborg, R. A. James, and A. Ghiorso, "The new element curium (atomic number 96)" in The Transuranium Elements: Research Papers, Vol. 14B, Paper 22.2 (MacGraw-Hill, New York, 1949), p. 1554.

J. G. Conway, W. F. Moore, and W. T. Crane, J. Am. Chem. Soc. 73, 1308 (1951).

J. G. Conway and R. D. McLaughlin, J. Opt. Soc. Am. 46, 91 (1956).

R. H. Gaddy, Appl. Spectrosc. 26, 49 (1972).

J. C. Hubbs, R. Marrus, and J. O. Winocur, Phys. Rev. 114, 586 (1959).

E. F. Worden, R. G. Gutmacher, E. K. Hulet, J. G. Conway, and M. Fred, J. Opt. Soc. Am. 52, 1311A (1962).

J. Sugar, J. Chem. Phys. 59, 788 (1973); 60, 4103 (1974).

W. F. Meggers, J. Opt. Soc. Am. 50, 405 (1960).

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 47, 1087 (1957).

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

F. S. Tomkins and M. Fred, Appl. Opt. 2, 715 (1963).

J. G. Conway and E. F. Worden, J. Opt. Soc. Am. 61, 704 (1971).

F. S. Tomkins and M. Fred, J. Opt. Soc. Am. 41, 641 (1951).

S. P. Davis and J. G. Phillips, The Red System (A 2.II–X2.Σ) of the CN Molecule, (University of California, Berkeley, 1963).

W. C. Bentley, J. Inorg. Nucl. Chem. 30, 2007 (1968).

R. G. Gutmacher of Lawrence Livermore Laboratory has compiled extensive line lists of 240.Pu as emitted by electrodeless lamps and observed on the ANL 9.15 m spectrograph.

M. Fred and F. S. Tomkins, J. Opt. Soc. Am. 47, 1076 (1957).

A. Giacchetti, J. Opt. Soc. Am. 56, 653 (1966); 57, 728 (1967).

L. C. Marquet and S. P. Davis, J. Opt. Soc. Am. 55, 471 (1965).

J. Reader and S. P. Davis, J. Res. Nat. Bur. Stand., Sec. A 71, 587 (1967).

P. F. A. Klinkenberg, Physica (Utrecht) 32, 113 (1966).

K. L. Vander Sluis, J. Opt. Soc. Am. 46, 605 (1956).

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

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

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

Mark Fred of Argonne National Laboratory estimated this value based on observations in other actinides.

L. Brewer, J. Opt. Soc. Am. 61, 1666 (1971).

H. N. Russell, Astrophys. J. 96, 11 (1942).

We are indebted to H. M. Crosswhite of Argonne National Laboratory for performing the theoretical calculations on 5ƒ8.7s2. of Cm I.

W. T. Carnall, H. M. Crosswhite, R. G. Pappalardo, D. Cohen, S. Fried, P. Lucas, and F. Wagner, Jr., J. Chem. Phys. 61, 4993 (1974).

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