Abstract

The groups of six levels obtained by adding, in Jj coupling, a 6p electron to the lowest level of the 4fN–1 core have been identified in gadolinium, dysprosium, erbium, and ytterbium (N=8, 9, 12, 14). They account for strong transitions to the corresponding 4fN–15s6s2 configurations. Values for the spin–orbit parameter of the 6p electron are (in cm−1) ζp=1835, 1840, 2049, 2257, respectively.

© 1971 Optical Society of America

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References

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    [Crossref]
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    [Crossref]

1971 (4)

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

N. Spector and S. Held, Astrophys. J. 167, 193 (1971).
[Crossref]

S. Held, Astrophys. J. 167, 203 (1971).
[Crossref]

W. F. Meggers, J. Res. Natl. Bur. Std. (U.S.) 75A (1971).

1970 (1)

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

1969 (1)

P. Camus, G. Guelachvili, and J. Verges, Spectrochim. Acta 24B, 373 (1969).

1967 (1)

1966 (2)

W. F. Meggers and C. H. Corliss, J. Res. Natl. Bur. Std. (U.S.) 70A, 63 (1966).
[Crossref]

P. F. A. Klinkenberg, Physica 32, 1113 (1966).
[Crossref]

1965 (1)

1950 (1)

1943 (1)

A. S. King, Astrophys. J. 97, 251 (1943).
[Crossref]

Camus, P.

P. Camus, G. Guelachvili, and J. Verges, Spectrochim. Acta 24B, 373 (1969).

Conway, J. G.

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

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

Corliss, C. H.

W. F. Meggers and C. H. Corliss, J. Res. Natl. Bur. Std. (U.S.) 70A, 63 (1966).
[Crossref]

Guelachvili, G.

P. Camus, G. Guelachvili, and J. Verges, Spectrochim. Acta 24B, 373 (1969).

Held, S.

N. Spector and S. Held, Astrophys. J. 167, 193 (1971).
[Crossref]

S. Held, Astrophys. J. 167, 203 (1971).
[Crossref]

King, A. S.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

A. S. King, Astrophys. J. 97, 251 (1943).
[Crossref]

Klinkenberg, P. F. A.

P. F. A. Klinkenberg, Physica 32, 1113 (1966).
[Crossref]

Meggers, W. F.

W. F. Meggers, J. Res. Natl. Bur. Std. (U.S.) 75A (1971).

W. F. Meggers and C. H. Corliss, J. Res. Natl. Bur. Std. (U.S.) 70A, 63 (1966).
[Crossref]

Moore, C. E.

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

Pinnington, E. H.

Russell, H. N.

Spector, N.

N. Spector and S. Held, Astrophys. J. 167, 193 (1971).
[Crossref]

N. Spector, J. Opt. Soc. Am. 55, 576 (1965).
[Crossref]

Verges, J.

P. Camus, G. Guelachvili, and J. Verges, Spectrochim. Acta 24B, 373 (1969).

Worden, E. F.

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

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

Astrophys. J. (3)

A. S. King, Astrophys. J. 97, 251 (1943).
[Crossref]

N. Spector and S. Held, Astrophys. J. 167, 193 (1971).
[Crossref]

S. Held, Astrophys. J. 167, 203 (1971).
[Crossref]

J. Opt. Soc. Am. (4)

J. Res. Natl. Bur. Std. (U.S.) (3)

A. S. King, J. G. Conway, E. F. Worden, and C. E. Moore, J. Res. Natl. Bur. Std. (U.S.) 74A, 355 (1970).
[Crossref]

W. F. Meggers, J. Res. Natl. Bur. Std. (U.S.) 75A (1971).

W. F. Meggers and C. H. Corliss, J. Res. Natl. Bur. Std. (U.S.) 70A, 63 (1966).
[Crossref]

Physica (1)

P. F. A. Klinkenberg, Physica 32, 1113 (1966).
[Crossref]

Spectrochim. Acta (1)

P. Camus, G. Guelachvili, and J. Verges, Spectrochim. Acta 24B, 373 (1969).

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Figures (2)

Fig. 1
Fig. 1

The 4fN–16s26p–4fN–15d6s2 interval.

Fig. 2
Fig. 2

ζ6p from 4fN–16s26p levels.

Tables (10)

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Table I 4f7(8S)6s26p levels of neutral gadolinium.

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Table II Intensity array in Gd i.

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Table III Observed 4 f 9 ( H 6 7 1 2 ) - 6 s 2 6 p levels of neutral dysprosium.

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Table IV Intensity array in Dy i.

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Table V Intensity array in Tb i.

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Table VI Observed 4 f 11 ( I 4 7 1 2 ) 6 s 2 6 p levels of neutral erbium.

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Table VII Intensity array in Er i.

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Table VIII Classified Er i lines.

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TABLE IX The 4f 135d6s2 levels of Yb i and Tm ii.

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Table X Observed 4 f 13 ( F 2 3 1 2 ) 6 s 2 6 p levels of neutral ytterbium.

Equations (2)

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Z 7 P 4 : 16 824.60 cm - 1 Z 7 P 3 : 16 920.37 Z 7 P 2 : 16 923.36.
F 0 = 32 000             G 1 = 170             ζ f = 2500 F 1 = 163             G 3 = 30             ζ d = 550 F 4 = 10             G 5 = 2.5.