Abstract

Measurements of the spectrum of triply ionized praseodymium produced by a 500-A sliding-spark discharge revealed new high-lying energy levels of both even and odd parity. Nearly all levels of the 4f5f configuration were found as well as portions of 4f6d, 4f7s, and 5d6p. Radial parameters were fitted to 4f5f and 4f6d. A value for the ionization limit of 314 200±200 cm−1 was deduced from the 4f6s, 7s series.

© 1971 Optical Society of America

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References

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  1. J. Sugar, J. Opt. Soc. Am. 55, 1058 (1965).
    [CrossRef]
  2. H. M. Crosswhite, G. H. Dieke, and W. J. Carter, J. Chem. Phys. 43, 2047 (1965).
    [CrossRef]
  3. Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Tahni, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).
  4. N. Spector, J. Opt. Soc. Am. 55, 492 (1965).
    [CrossRef]
  5. G. Racah, Bull. Res. Council Israel 8F, 1 (1959).
  6. B. G. Wybourne, in Spectroscopic Properties of Hare Earths (Wiley, New York, 1965).
  7. J. Sugar and V. Kaufman, private communication.
  8. V. Kaufman and J. Sugar, J. Res. Natl. Bur. Std. (U.S.) 71A, 583 (1967).
    [CrossRef]
  9. J. Sugar and J. Reader, J. Opt. Soc. Am. 55, 1286 (1965).
    [CrossRef]

1967 (1)

V. Kaufman and J. Sugar, J. Res. Natl. Bur. Std. (U.S.) 71A, 583 (1967).
[CrossRef]

1965 (4)

1959 (1)

G. Racah, Bull. Res. Council Israel 8F, 1 (1959).

Carter, W. J.

H. M. Crosswhite, G. H. Dieke, and W. J. Carter, J. Chem. Phys. 43, 2047 (1965).
[CrossRef]

Crosswhite, H. M.

H. M. Crosswhite, G. H. Dieke, and W. J. Carter, J. Chem. Phys. 43, 2047 (1965).
[CrossRef]

Dieke, G. H.

H. M. Crosswhite, G. H. Dieke, and W. J. Carter, J. Chem. Phys. 43, 2047 (1965).
[CrossRef]

Goldschmidt, Z. B.

Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Tahni, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).

Kaufman, V.

V. Kaufman and J. Sugar, J. Res. Natl. Bur. Std. (U.S.) 71A, 583 (1967).
[CrossRef]

J. Sugar and V. Kaufman, private communication.

Racah, G.

G. Racah, Bull. Res. Council Israel 8F, 1 (1959).

Reader, J.

Spector, N.

Sugar, J.

V. Kaufman and J. Sugar, J. Res. Natl. Bur. Std. (U.S.) 71A, 583 (1967).
[CrossRef]

J. Sugar, J. Opt. Soc. Am. 55, 1058 (1965).
[CrossRef]

J. Sugar and J. Reader, J. Opt. Soc. Am. 55, 1286 (1965).
[CrossRef]

J. Sugar and V. Kaufman, private communication.

Wybourne, B. G.

B. G. Wybourne, in Spectroscopic Properties of Hare Earths (Wiley, New York, 1965).

Bull. Res. Council Israel (1)

G. Racah, Bull. Res. Council Israel 8F, 1 (1959).

J. Chem. Phys. (1)

H. M. Crosswhite, G. H. Dieke, and W. J. Carter, J. Chem. Phys. 43, 2047 (1965).
[CrossRef]

J. Opt. Soc. Am. (3)

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

V. Kaufman and J. Sugar, J. Res. Natl. Bur. Std. (U.S.) 71A, 583 (1967).
[CrossRef]

Other (3)

Z. B. Goldschmidt, in Spectroscopic and Group Theoretical Methods in Physics, edited by F. Block, S. G. Cohen, A. De-Shalit, S. Sambursky, and I. Tahni, (North-Holland, Amsterdam, 1968; American Elsevier, New York, distr.).

B. G. Wybourne, in Spectroscopic Properties of Hare Earths (Wiley, New York, 1965).

J. Sugar and V. Kaufman, private communication.

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Figures (1)

F. 1
F. 1

Interval between centers of gravity of 4fn6s and 4fn7s configurations of doubly ionized (R.E. iii) and triply ionized (R.E. iv) rare earths. End points of the R.E. iii curve are La iii and Lu iii. End points of the R.E. iv curve are Ce iv and Hf iv. The Lu iii and Lu iv points are from unpublished data of Sugar and Kaufman.

Tables (6)

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Table I New energy levels of Pr iv.

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Table II Fitted radial parameter values and associated standard errors for the 4f5f configuration of Pr iv.

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Table III Calculated energy-level values and compositions for the 4f5f configuration of Pr iv. Negative eigenvector components are denoted by asterisks.

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Table IV Fitted radial parameter values and associated standard errors for the 4f6d configuration of Pr iv.

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Table V Calculated energy-level values and compositions for the 4f6d configuration of Pr iv. Negative eigenvector components are denoted by asterisks.

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Table VI Newly classified lines of Pr iv. Asterisks denote double-classified lines.

Equations (67)

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139 711.8 J = 3 , 2 139 784.5 4 144 343.9 3 145 362.7 4 .
198 155.4 J = 3 194 777.2 J = 5 197 196.9 J = 6 .
Δ j 1 ( 4 f 4 f ) = 0 Δ j 2 ( 6 d 6 p ) = Δ J = 1 .
( 5 2 , 3 2 ) °
( 5 2 , 5 2 ) °
( 7 2 , 3 2 ) °
( 7 2 , 5 2 ) °
( 5 2 , 1 2 ) °
[ 7 2 ]
[ 11 2 ]
[ 3 2 ]
[ 9 2 ]
[ 5 2 ]
[ 1 2 ]
[ 9 2 ]
[ 5 2 ]
[ 13 2 ]
[ 3 2 ]
[ 11 2 ]
[ 7 2 ]
[ 1 2 ]
5 2 [ 1 2 ] 89 % , * 7 2 [ 1 2 ] 11 %
7 2 [ 1 2 ] 89 , 5 2 [ 1 2 ] 11
5 2 [ 3 2 ] 87 , * 5 2 [ 1 2 ] 12
5 2 [ 1 2 ] 70 , * 7 2 [ 3 2 ] 16 , * 5 2 [ 3 2 ] 7 %
* 7 2 [ 3 2 ] 52 , * 7 2 [ 1 2 ] 46
7 2 [ 1 2 ] 47 , 7 2 [ 3 2 ] 32 , 5 2 [ 3 2 ] 16
5 2 [ 3 2 ] 55 , * 5 2 [ 5 2 ] 25 , 7 2 [ 5 2 ] 10
5 2 [ 5 2 ] 74 , 5 2 [ 3 2 ] 20
* 7 2 [ 5 2 ] 74 , 5 2 [ 3 2 ] 21
7 2 [ 3 2 ] 84 , * 7 2 [ 5 2 ] 12
5 2 [ 7 2 ] 86 , 5 2 [ 5 2 ] 14
5 2 [ 5 2 ] 73 , * 7 2 [ 7 2 ] 13 , * 5 2 [ 7 2 ] 11
7 2 [ 5 2 ] 67 , * 7 2 [ 7 2 ] 33
7 2 [ 7 2 ] 54 , 7 2 [ 5 2 ] 30 , 5 2 [ 5 2 ] 13
5 2 [ 7 2 ] 69 , * 5 2 [ 9 2 ] 15 , 7 2 [ 9 2 ] 13
5 2 [ 9 2 ] 85 , 5 2 [ 7 2 ] 13
* 7 2 [ 9 2 ] 55 , * 7 2 [ 7 2 ] 27 , 5 2 [ 7 2 ] 18
7 2 [ 7 2 ] 69 , * 7 2 [ 9 2 ] 30
5 2 [ 11 2 ] 68 , 5 2 [ 9 2 ] 30
5 2 [ 9 2 ] 57 , * 5 2 [ 11 2 ] 31 , * 7 2 [ 11 2 ] 10
7 2 [ 9 2 ] 84 , * 7 2 [ 11 2 ] 16
7 2 [ 11 2 ] 72 , 7 2 [ 9 2 ] 14 , 5 2 [ 9 2 ] 13
5 2 [ 11 2 ] 79 , * 7 2 [ 13 2 ] 20
7 2 [ 11 2 ] 84 , * 7 2 [ 13 2 ] 10
7 2 [ 13 2 ] 70 , 7 2 [ 11 2 ] 16 , 5 2 [ 11 2 ] 14
7 2 [ 13 2 ] 100
( 5 2 , 5 2 ) 100 %
( 5 2 , 3 2 ) 55 , ( 5 2 , 5 2 ) 44 %
* ( 5 2 , 5 2 ) 56 , ( 5 2 , 3 2 ) 41
( 7 2 , 5 2 ) 96
( 5 2 , 3 2 ) 93
( 5 2 , 5 2 ) 90
( 7 2 , 3 2 ) 54 , * ( 7 2 , 5 2 ) 44
( 7 2 , 5 2 ) 54 , ( 7 2 , 3 2 ) 45
( 5 2 , 3 2 ) 83 , * ( 5 2 , 5 2 ) 17
( 5 2 , 5 2 ) 80 , ( 5 2 , 3 2 ) 16
* ( 7 2 , 3 2 ) 95
( 7 2 , 5 2 ) 99
( 5 2 , 3 2 ) 98
( 5 2 , 5 2 ) 98
( 7 2 , 3 2 ) 99
( 7 2 , 5 2 ) 100
( 5 2 , 5 2 ) 91
( 7 2 , 5 2 ) 55 , * ( 7 2 , 3 2 ) 45
( 7 2 , 3 2 ) 48 , ( 7 2 , 5 2 ) 44
( 7 2 , 5 2 ) 100