Abstract

The sppctrum 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 4ƒ<sup>7</sup> configuration and to the 4ƒ<sup>6</sup>(<sup>7</sup><i>F</i>)5<i>d</i>, 4ƒ<sup>6</sup> (<sup>7</sup><i>F</i>)6<i>s</i>, and 4ƒ<sup>6</sup>(<sup>7</sup><i>F</i>)6<i>p</i> subconfigurations. Except for 4ƒ<sup>7</sup>, 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.

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  1. H. N. Russell, W. Albertson, and D. N. Davis, Phys. Rev. 60, 641 (1941).
  2. W. C. Martin and J. Sugar, Astrophys. J. 184, 671 (1973).
  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).
  5. H. A. Weakliem, C. H. Anderson, and E. S. Sabisky, Phys. Rev. B 2, 4354 (1970).
  6. J. Sugar, J. Opt. Soc. Am. 60, 454 (1970). An unpublished calculation of 4ƒ125d, including the effective operators Dk and Xk resulted in the values D1= -710, D3 (undefined), X2= -2340 and X4= −2630 cm-1.
  7. A. Carlier, Contribution à l'Étude Théorique des Spectres d'Arc et d'Étincelle du Samarimn (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).
  9. S. Feneuille and N. Pelletier-Allard, Physica 40, 347 (1968).
  10. Z. B. Goldschmidt, J. Phys. B 3, L141 (1970).
  11. J. Sugar and V. Kaufman, J. Opt. Soc. Am. 62, 562 (1972).
  12. C. W. Nielson and G. F. Koster, Spectroscopic Coefficients for the pn, dn, and ƒn Configurations. (M.I.T. Press, Cambridge, Mass., 1963).
  13. J. Sugar and J. Reader, J. Chem. Phys. 59, 2083 (1973).

Albertson, W.

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

Anderson, C. H.

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

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 Samarimn (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).

Davis, D. N.

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

Feneuille, S.

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

Fields, P. R.

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

Goldschmidt, Z. B.

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

JØrgensen, C. K.

C. K. JØrgensen, Prog. Inorg. Chem. 4, 73 (1962).

Kaufman, V.

J. Sugar and V. Kaufman, J. Opt. Soc. Am. 62, 562 (1972).

Koster, G. F.

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

Martin, W. C.

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

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 ƒn Configurations. (M.I.T. Press, Cambridge, Mass., 1963).

Pelletier-Allard, N.

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

Rajnak, K.

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

Reader, J.

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

Russell, H. N.

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

Sabisky, E. S.

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

Sugar, J.

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

J. Sugar and V. Kaufman, J. Opt. Soc. Am. 62, 562 (1972).

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

J. Sugar, J. Opt. Soc. Am. 60, 454 (1970). An unpublished calculation of 4ƒ125d, including the effective operators Dk and Xk resulted in the values D1= -710, D3 (undefined), X2= -2340 and X4= −2630 cm-1.

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).

Other (13)

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

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

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)].

C. K. JØrgensen, Prog. Inorg. Chem. 4, 73 (1962).

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

J. Sugar, J. Opt. Soc. Am. 60, 454 (1970). An unpublished calculation of 4ƒ125d, including the effective operators Dk and Xk resulted in the values D1= -710, D3 (undefined), X2= -2340 and X4= −2630 cm-1.

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

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

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

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

J. Sugar and V. Kaufman, J. Opt. Soc. Am. 62, 562 (1972).

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

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

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