Abstract

The structure of about 40 low-energy levels of singly ionized thulium is given. The twenty 4ƒ<sup>12</sup>(<sup>3</sup><i>H</i><sub>6</sub>)5<i>d</i>6<i>s</i> levels are interpreted in <i>J</i><sub>I</sub><i>J</i><sub>II</sub> and <i>J</i><sub>I</sub><i>L</i><sub>II</sub>, coupling schemes, and the twelve 4ƒ<sup>12</sup>(<sup>3</sup><i>H</i><sub>6</sub>)6<i>s</i>6<i>p</i> and six of the 4ƒ<sup>13</sup>6<i>p</i> levels are given <i>J</i><sub>I</sub><i>J</i><sub>II</sub> designations. The first three levels of 4ƒ<sup>12</sup>6<i>s</i><sup>2</sup> are established. The intensity relations of the transitions connecting some of the levels are discussed. The following values for the interaction parameters are obtained directly from these levels: ζ<sub>ƒ</sub>=2506 cm<sup>-1</sup> ζ<sub><i>d</i></sub>=1213 cm<sup>-1</sup> ζ<sub><i>p</i></sub>=2111 cm<sup>-1</sup> (from 4ƒ<sup>13</sup>6<i>p</i>) ζ<sub><i>p</i></sub>=3467 cm<sup>-1</sup> (from 4ƒ<sup>12</sup>6<i>s</i>6<i>p</i>) <i>G</i><sub>ƒ<i>s</i></sub>= 212 cm<sup>-1</sup><i>G<sub>ds</sub></i>=1535 cm<sup>-1</sup><i>G<sup>ps</sup></i>=2613 cm<sup>-1</sup> More than 200 lines are classified.

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  1. N. Spector, J. Opt. Soc. Am. 57, 308 (1967).
  2. W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
  3. N. Spector, Ph.D. thesis, Hebrew University of Jerusalem (1962).
  4. J. Blaise and P. Camus, Compt. Rend. 260, 4693 (1965).
  5. G. Racah, J. Opt. Soc. Am. 50, 396 (1960).
  6. J. Sugar, J. Opt. Soc. Am. 55, 33 (1965).
  7. E. U. Condon and G. H. Shortley, Theory of Atomic Spectra (Cambridge University Press, 1963), p. 273.
  8. H. N. Russell and W. F. Meggers, J. Res. Natl. Bur. Std. (U. S.) 9, 625 (1932).

Blaise, J.

J. Blaise and P. Camus, Compt. Rend. 260, 4693 (1965).

Camus, P.

J. Blaise and P. Camus, Compt. Rend. 260, 4693 (1965).

Condon, E. U.

E. U. Condon and G. H. Shortley, Theory of Atomic Spectra (Cambridge University Press, 1963), p. 273.

Meggers, W. F.

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

H. N. Russell and W. F. Meggers, J. Res. Natl. Bur. Std. (U. S.) 9, 625 (1932).

Racah, G.

G. Racah, J. Opt. Soc. Am. 50, 396 (1960).

Russell, H. N.

H. N. Russell and W. F. Meggers, J. Res. Natl. Bur. Std. (U. S.) 9, 625 (1932).

Shortley, G. H.

E. U. Condon and G. H. Shortley, Theory of Atomic Spectra (Cambridge University Press, 1963), p. 273.

Spector, N.

N. Spector, Ph.D. thesis, Hebrew University of Jerusalem (1962).

N. Spector, J. Opt. Soc. Am. 57, 308 (1967).

Sugar, J.

J. Sugar, J. Opt. Soc. Am. 55, 33 (1965).

Other (8)

N. Spector, J. Opt. Soc. Am. 57, 308 (1967).

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

N. Spector, Ph.D. thesis, Hebrew University of Jerusalem (1962).

J. Blaise and P. Camus, Compt. Rend. 260, 4693 (1965).

G. Racah, J. Opt. Soc. Am. 50, 396 (1960).

J. Sugar, J. Opt. Soc. Am. 55, 33 (1965).

E. U. Condon and G. H. Shortley, Theory of Atomic Spectra (Cambridge University Press, 1963), p. 273.

H. N. Russell and W. F. Meggers, J. Res. Natl. Bur. Std. (U. S.) 9, 625 (1932).

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