Jack Sugar and Victor Kaufman, "Identification of 5g and 6g terms and revised ionization energies in the Yb ii 4f14n l isoelectronic sequence," J. Opt. Soc. Am. 69, 141-143 (1979)
The 5f-5g transitions in Lu iii through Os viii and the 5f-6g transitions in Hf iv through W vi were identified and used to redetermine the ionization energies of Yb ii, Lu iii, W vi, Re vii, and Os viii. Complete line-lists and energy levels are given for the one-electron spectra Hf iv, W vi and Os viii.
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Wavelengths greater than 2000 Å are air wavelengths.
intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
This wavelength was taken from Ref. 7.
TABLE II
Classified lines of the one-electron spectrum of W vi
Intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
TABLE III
Classified lines of the one-electron spectrum of Os viii
Intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
indicates that this line is partially blended with another line.
TABLE IV
The f14nl energy levels of triply ionized hafnium. The estimated uncertainty in the level values is ± 1.0 cm−1
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0.0
5/2
4 692.6
4692.6
6s2S
1/2
18 380.2
6p2P°
1/2
67 038.3
3/2
76 614.8
9576.5
7s2S
1/2
140 228.4
6d2D
3/2
140 711.5
5/2
142 027.0
1315.5
5f2F°
5/2
154 467.1
7/2
154 923.8
456.7
7p2P°
1/2
3/2
162 597.6
8s2S
1/2
189 869.9
6f2F°
5/2
196 808.6
7/2
196 986.7
178.1
5g2G
7/2
198 348.4
9/2
198 347.0
−1.4
6g2G
7/2
219 918.2
9/2
219 912.7
−5.5
TABLE V
The f14nl energy levels of five-times ionized tungsten. The estimated uncertainty in the level values given to one decimal place is ±1.0 cm−1, and is ±3.0 for those given to the units place
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0.0
8 709.3
5/2
8 709.3
6s2S
1/2
79 431.3
6p2P°
1/2
147 553.1
17 483.6
3/2
165 036.7
6d2D
3/2
261 694.6
2 717.1
5/2
264 411.7
7s2S
1/2
278 915.5
5f2F°
5/2
261 681.
749.
7/2
262 430.
5g2G
7/2
362 234.
−12.
9/2
362 222.
6g2G
7/2
411 087.
−8.
9/2
411 079.
TABLE VI
The f14nl energy levels of seven-times ionized osmium. The estimated uncertainty in the level values is ±5.0 cm−1
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0
13 482
5/2
13 482
6s2S
1/2
153 679
6p2P°
1/2
240 622
27 323
3/2
267 945
5f2F°
5/2
357 966
2 614
7/2
360 580
5g2G
7/2
537 066
−10
9/2
537 056
TABLE VII
Newly identified 5f-ng (n = 5, 6) lines and ng levels of Lu iii, Ta v, and Re vii
Wavelengths greater than 2000 Å are air wavelengths.
intensities are visual estimates of photographic plate blackening. Relative intensities of the different ions are not meaningful.
TABLE VIII
Ionization energies derived from values for n*(5g) read from curve A of Fig. 1. The fixed points of curve A are Yb ii, Hf iv, and Ta v
Wavelengths greater than 2000 Å are air wavelengths.
intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
This wavelength was taken from Ref. 7.
TABLE II
Classified lines of the one-electron spectrum of W vi
Intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
TABLE III
Classified lines of the one-electron spectrum of Os viii
Intensities given are visual estimates of photographic plate blackening. Relative intensities of widely separated multiplets could not be estimated meaningfully.
indicates that this line is partially blended with another line.
TABLE IV
The f14nl energy levels of triply ionized hafnium. The estimated uncertainty in the level values is ± 1.0 cm−1
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0.0
5/2
4 692.6
4692.6
6s2S
1/2
18 380.2
6p2P°
1/2
67 038.3
3/2
76 614.8
9576.5
7s2S
1/2
140 228.4
6d2D
3/2
140 711.5
5/2
142 027.0
1315.5
5f2F°
5/2
154 467.1
7/2
154 923.8
456.7
7p2P°
1/2
3/2
162 597.6
8s2S
1/2
189 869.9
6f2F°
5/2
196 808.6
7/2
196 986.7
178.1
5g2G
7/2
198 348.4
9/2
198 347.0
−1.4
6g2G
7/2
219 918.2
9/2
219 912.7
−5.5
TABLE V
The f14nl energy levels of five-times ionized tungsten. The estimated uncertainty in the level values given to one decimal place is ±1.0 cm−1, and is ±3.0 for those given to the units place
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0.0
8 709.3
5/2
8 709.3
6s2S
1/2
79 431.3
6p2P°
1/2
147 553.1
17 483.6
3/2
165 036.7
6d2D
3/2
261 694.6
2 717.1
5/2
264 411.7
7s2S
1/2
278 915.5
5f2F°
5/2
261 681.
749.
7/2
262 430.
5g2G
7/2
362 234.
−12.
9/2
362 222.
6g2G
7/2
411 087.
−8.
9/2
411 079.
TABLE VI
The f14nl energy levels of seven-times ionized osmium. The estimated uncertainty in the level values is ±5.0 cm−1
Term
J
Level (cm−1)
Fine-structure interval (cm−1)
5d2D
3/2
0
13 482
5/2
13 482
6s2S
1/2
153 679
6p2P°
1/2
240 622
27 323
3/2
267 945
5f2F°
5/2
357 966
2 614
7/2
360 580
5g2G
7/2
537 066
−10
9/2
537 056
TABLE VII
Newly identified 5f-ng (n = 5, 6) lines and ng levels of Lu iii, Ta v, and Re vii
Wavelengths greater than 2000 Å are air wavelengths.
intensities are visual estimates of photographic plate blackening. Relative intensities of the different ions are not meaningful.
TABLE VIII
Ionization energies derived from values for n*(5g) read from curve A of Fig. 1. The fixed points of curve A are Yb ii, Hf iv, and Ta v
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