Abstract

The spectrum of Eu iii obtained with a 6 A sliding-spark discharge has been measured from 2000 Å to 9000 Å. Of the 890 spectral lines observed, one-third are classified in an energy-level scheme consisting of 104 excited levels. These belong to the 4f7 configuration and to the 4f6(7F)5d, 4f6(7F)6s, and 4f6(7F)6p subconfigurations. Except for 4f7, calculations of these configurations with least-squares-adjusted parameters were carried out. A reasonably suitable truncation for the energy matrices of each configuration was found.

© 1974 Optical Society of America

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References

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  1. H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
    [Crossref]
  2. W. C. Martin and J. Sugar, Astrophys. J. 184, 671 (1973).
    [Crossref]
  3. S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].
  4. C. K. Jørgensen, Prog. Inorg. Chem. 4, 73 (1962).
    [Crossref]
  5. H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
    [Crossref]
  6. J. Sugar, J. Opt. Soc. Am. 60, 454 (1970). An unpublished calculation of 4f125d, including the effective operators Dk and Xk resulted in the values D1= −710, D3(undefined), X2= −2340 and X4= −2630 cm−1.
    [Crossref]
  7. A. Carlier, Contribution à l’Étude Théorique des Spectres d’Arc et d’Étincelle du Samarium (Ph.D. thesis, Faculté des Sciences d’Orsay, 1967).
  8. W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
    [Crossref]
  9. S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
    [Crossref]
  10. Z. B. Goldschmidt, J. Phys. B 3, L141 (1970).
    [Crossref]
  11. J. Sugar and V. Kaufman, J. Opt. Soc. Am. 62, 562 (1972).
    [Crossref]
  12. C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and fnConfigurations. (M.I.T. Press, Cambridge, Mass., 1963).
  13. J. Sugar and J. Reader, J. Chem. Phys. 59, 2083 (1973).
    [Crossref]

1973 (3)

W. C. Martin and J. Sugar, Astrophys. J. 184, 671 (1973).
[Crossref]

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

J. Sugar and J. Reader, J. Chem. Phys. 59, 2083 (1973).
[Crossref]

1972 (1)

1970 (3)

1968 (2)

W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
[Crossref]

S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
[Crossref]

1962 (1)

C. K. Jørgensen, Prog. Inorg. Chem. 4, 73 (1962).
[Crossref]

1941 (1)

H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
[Crossref]

Albertson, W.

H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
[Crossref]

Anderson, C. H.

H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
[Crossref]

Bodrug, S. N.

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Carlier, A.

A. Carlier, Contribution à l’Étude Théorique des Spectres d’Arc et d’Étincelle du Samarium (Ph.D. thesis, Faculté des Sciences d’Orsay, 1967).

Carnall, W. F.

W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
[Crossref]

Davis, D. N.

H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
[Crossref]

Feneuille, S.

S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
[Crossref]

Fields, P. R.

W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
[Crossref]

Goldschmidt, Z. B.

Z. B. Goldschmidt, J. Phys. B 3, L141 (1970).
[Crossref]

Jørgensen, C. K.

C. K. Jørgensen, Prog. Inorg. Chem. 4, 73 (1962).
[Crossref]

Kaufman, V.

Koster, G. F.

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

Martin, W. C.

W. C. Martin and J. Sugar, Astrophys. J. 184, 671 (1973).
[Crossref]

Mednikova, V. N.

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Nielson, C. W.

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

Pelletier-Allard, N.

S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
[Crossref]

Rajnak, K.

W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
[Crossref]

Reader, J.

J. Sugar and J. Reader, J. Chem. Phys. 59, 2083 (1973).
[Crossref]

Russell, H. N.

H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
[Crossref]

Sabisky, E. S.

H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
[Crossref]

Sugar, J.

Sviridov, D. T.

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Sviridov, R. K.

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Valyashko, E. G.

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Weakliem, H. A.

H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
[Crossref]

Astrophys. J. (1)

W. C. Martin and J. Sugar, Astrophys. J. 184, 671 (1973).
[Crossref]

J. Chem. Phys. (2)

W. F. Carnall, P. R. Fields, and K. Rajnak, J. Chem. Phys. 49, 4450 (1968).
[Crossref]

J. Sugar and J. Reader, J. Chem. Phys. 59, 2083 (1973).
[Crossref]

J. Opt. Soc. Am. (2)

J. Phys. B (1)

Z. B. Goldschmidt, J. Phys. B 3, L141 (1970).
[Crossref]

Opt. Spektrosk. (1)

S. N. Bodrug, E. G. Valyashko, V. N. Mednikova, D. T. Sviridov, and R. K. Sviridov, Opt. Spektrosk. 34, 312 (1973) [Opt. Spectrosc. 34, 176 (1973)].

Phys. Rev. (1)

H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
[Crossref]

Phys. Rev. B (1)

H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
[Crossref]

Physica (1)

S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
[Crossref]

Prog. Inorg. Chem. (1)

C. K. Jørgensen, Prog. Inorg. Chem. 4, 73 (1962).
[Crossref]

Other (2)

A. Carlier, Contribution à l’Étude Théorique des Spectres d’Arc et d’Étincelle du Samarium (Ph.D. thesis, Faculté des Sciences d’Orsay, 1967).

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

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Figures (2)

Fig. 1
Fig. 1

Energy levels of 4f6(7F)5d and 4f6(7F)6s subconfigurations of Eu iii. The levels of 4f66s are drawn as heavier horizontal lines. Unknown levels are given as dashed lines at their calculated positions.

Fig. 2
Fig. 2

Energy levels of 4f6(7F)6p subconfiguration of Eu iii. Levels are grouped according to J1j coupling. Unknown levels are drawn as dashed lines at their calculated positions.

Tables (6)

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Table I Energy levels of Eu iii.

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Table II Fitted values of the energy parameters for the 4f6(7F)6p configuration of Eu iii.

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Table III Calculated energy levels and percent composition in J1j coupling of the 4f6(7F)6p configuration. Only the first two components of the eigenvectors are given. Units for levels are cm−1.

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Table IV Fitted values of the energy parameters for the interacting configurations 4f6(7F)5d and 4f6(7F)6s of Eu iii.

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Table V Calculated energy levels and percent composition in LS coupling of the 4f6(7F)5d and 4f6 (7F)6s configurations with interaction. Only the first two components of the eigenvectors are given. Units for levels are cm−1.

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Table VI Observed and calculated g factors for levels of 4f65d combining with the 8S7/2 ground level.