Abstract

The structure of about 40 low-energy levels of singly ionized thulium is given. The twenty 4f12(3H6)5d6s levels are interpreted in JIJII and JILII coupling schemes, and the twelve 4f12(3H6)6s6p and six of the 4f136p levels are given JIJII designations. The first three levels of 4f126s2 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:

ζf =25 06 cm−1Gfs = 212 cm−1
ζd =121 3 cm−1Gds = 1535 cm−1
ζp = 2111 cm−1 (from 4f136p)Gps = 2613 cm−1
ζp = 3467 cm−1 (from 4f126s6p)

More than 200 lines are classified.

© 1967 Optical Society of America

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References

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  1. N. Spector, J. Opt. Soc. Am. 57, 308 (1967).
    [Crossref]
  2. W. F. Meggers, Rev. Mod. Phys. 14, 96 (1942).
    [Crossref]
  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).
    [Crossref]
  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).

1967 (1)

1965 (2)

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

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

1960 (1)

1942 (1)

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

1932 (1)

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).
[Crossref]

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

Racah, G.

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, J. Opt. Soc. Am. 57, 308 (1967).
[Crossref]

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

Sugar, J.

Compt. Rend. (1)

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

J. Opt. Soc. Am. (3)

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

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

Rev. Mod. Phys. (1)

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

Other (2)

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

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

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Figures (2)

Fig. 1
Fig. 1

Observed levels based on the core level 4f12(3H6), of the subconfigurations 6s2, 5d6s, and 6s6p of Tm ii, grouped according to JI–(SIILII)JII coupling.

Fig. 2
Fig. 2

Observed levels of 4f12(3H6)5d6s of Tm ii grouped according to JILII coupling.

Tables (5)

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Table I Observed energy levels of Tm ii, even parity.

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Table II 4f12(3H6)5d6s levels in JI–(SL)JII notation.

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Table III Observed energy levels of Tm ii, odd parity.

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Table IV Classified lines of Tm ii.

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Table V Line intensities (in spark and arc) in the 4f12(3H6)5d6s–4f12(3H6)6s6p transition array of Tm ii.

Equations (1)

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F 3 3 - F 3 2 F 3 4 - F 3 3 = - 3 4 ( F 3 4 - F 3 2 F 1 3 - F 3 2 - 1 )