Jean-François Wyart, Joseph Reader, and Aleksandr Ryabtsev, "3d–4p Transitions in the zinclike and copperlike ions Y x, xi; Zr xi, xii; Nb xii, xiii; and Mo xiii, xiv," J. Opt. Soc. Am. 71, 692-698 (1981)
Lines occurring as satellites on the long-wavelength side of the 3d10–3d94p resonance lines of Ni-like ions have been investigated with a low-inductance vacuum spark and a 10.7-m spectrograph for the elements Y, Zr, Nb, and Mo. The lines are interpreted as 3d104s–3d94s4p and 3d104p–3d94p2 transitions in the Cu-like ions Y xi, Zr xii, Nb xiii, and Mo xiv and 3d104s2–3d94s24p transitions in the Zn-like ions Y x, Zr xi, Nb xii, and Mo xiii. The spectra of the Cu-like ions were interpreted by generalized least-squares fits for the energy levels of the sequence of four ions. Thirty-nine levels of 3d94s4p were interpreted simultaneously with a root-mean-square deviation of 122 cm−1; forty-four levels of 3d94p2 were interpreted in the same way with a root-mean-square deviation of 200 cm−1. Line identifications and energy levels were obtained for the 3d107p configuration of the Cu-like ions Y xi–Mo xiv.
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Lines Classified as 3d104s–3d9 4s4p and 3d104p–3d94p2 Transitions in Y xi, Zr xxi, Nb xiii, and Mo xiva
Y xi
Zr xii
Nb xiii
Mo xiv
Classification
Code
λ (Å)
Int.
λ (Å)
Int.
λ (Å)
Int.
λ (Å)
Int.
A
73.639
15
64.466
20
57.001
15
50.788
10
a
73.908
2
64.794
1w
57.393
2
51.20
1
b
74.175?
1
57.187
1
c
74.391
5
65.059
2
57.468
2
51.158
1
B
74.456
30
65.200
50
57.662
30
51.398
20
d
74.896
8
65.466
5
57.797
3
51.434
1
e
74.954
2p
65.540
3
57.884
2
51.531
1
f
65.609
1
g
75.209
10
h
75.233
15
65.760
10
58.053
10
51.666
5
i
75.307
25
65.896
10
58.241
15
51.894
8
j
65.816?
1
k
75.438
10
66.029
5
58.362
5
52.00
2u
l
75.521
35
66.080
20
58.386
20
52.013
10u
m
75.584
25
66.115
10
58.407
10
52.019
8u
n
75.945
2
66.327
2
C
76.274
25
66.597
8
58.728
10
52.225
5
o
76.283?
2u
66.687?
3
58.888*
5
52.415*
2
P
58.909
3
q
76.331
10
66.717
5p
58.888*
5
52.415*
2
r
76.434?
15l
66.792?
5
s
76.584?
15
D
76.66
1
66.928
3
59.016
5w
52.473
5
E
76.843
40
67.121
30
59.214
20
52.687
10
F
76.920
50
67.201
50
59.285
40
52.750
20
G
77.340
35
67.569
30
59.612
20
53.044
10
t
59.826
2
u
77.436
5l
H
77.667
5
67.768
5
59.722
5
53.095
3
I
77.910
5w
68.022
2
59.971
5
53.335
3
J
78.424
25
68.476
15
60.383
10
53.725
5
Levels are designated in LS coupling: The parent terms for 3d9 and for the coupled external electrons 4s4p or 4p2 are given in parentheses. A code has been attributed to the transitions to facilitate correspondence with Fig. 1. Capital letters denote 3d104s–3d94s4p transitions; lower-case letters denote 3d104p–3d94p2 transitions. Symbols: u, unresolved; w, wide; l, shaded to longer wavelengths; p, perturbed by close line; *, doubly classified. Lines for which a question mark is given have observed intensities much larger than expected; they may be blended with lines of other ionization stages. Not all the transitions are shown in Fig. 1.
Table 2
Experimental Energy Levels of the 3d94s4p Configurations of Y xi, Zr xii, Nb xiii, and Mo xiva
The deviations ΔE = Eexp − Eth are taken from the generalized least-squares treatment of the whole sequence. The percentage of the leading LS component is given. Predicted energies for the
levels are given in brackets.
*Level value based on eyepiece measurement; not used in least-squares fit.
Table 3
Fitted Scaling Factors for the Hartree–Fock Integrals
GLS fit of 3d94p2 + 3d94s4d.
GLS fit of 3d94s4p.
An equal value has been assumed for the four elements.
The same scaling factor has been assumed for G3(3d4p) and G1(3d4p).
The scaling factors are constrained to be linearly dependent on the atomic number.
Table 4
Fitted Parameter Values (in cm−1) for the 3d94s4p and 3d94p2 Configurations of Y xi, Zr xii, Nb xiii, and Mo xiv
The deviations ΔE = Eexp − Eth are taken from the generalized least-squares treatment of the whole sequence. Predicted energies for unknown levels are given in brackets. The designations are given in LS coupling with parent term of 4p2 in parentheses. The percentages of the leading eigenvector components are also given.
Leading component, (3P) 4F, 49%.
Leading component, (3P) 2D, 40%.
Leading component, (1D) 2P, 26%.
Leading component, (3P) 2P, 47%.
Leading component, (3P) 4P, 30%.
Leading component, (3P) 4F, 29%.
Leading component, (3P) 4F, 26%.
Table 7
3d104s–3d107p Transitions in Y xi, Zr xii, Nb xiii, and Mo xiv
Blended with 3p63d8 1G4–3p53d9 1F3 transition of Y xiv.
Tables (9)
Table 1
Lines Classified as 3d104s–3d9 4s4p and 3d104p–3d94p2 Transitions in Y xi, Zr xxi, Nb xiii, and Mo xiva
Y xi
Zr xii
Nb xiii
Mo xiv
Classification
Code
λ (Å)
Int.
λ (Å)
Int.
λ (Å)
Int.
λ (Å)
Int.
A
73.639
15
64.466
20
57.001
15
50.788
10
a
73.908
2
64.794
1w
57.393
2
51.20
1
b
74.175?
1
57.187
1
c
74.391
5
65.059
2
57.468
2
51.158
1
B
74.456
30
65.200
50
57.662
30
51.398
20
d
74.896
8
65.466
5
57.797
3
51.434
1
e
74.954
2p
65.540
3
57.884
2
51.531
1
f
65.609
1
g
75.209
10
h
75.233
15
65.760
10
58.053
10
51.666
5
i
75.307
25
65.896
10
58.241
15
51.894
8
j
65.816?
1
k
75.438
10
66.029
5
58.362
5
52.00
2u
l
75.521
35
66.080
20
58.386
20
52.013
10u
m
75.584
25
66.115
10
58.407
10
52.019
8u
n
75.945
2
66.327
2
C
76.274
25
66.597
8
58.728
10
52.225
5
o
76.283?
2u
66.687?
3
58.888*
5
52.415*
2
P
58.909
3
q
76.331
10
66.717
5p
58.888*
5
52.415*
2
r
76.434?
15l
66.792?
5
s
76.584?
15
D
76.66
1
66.928
3
59.016
5w
52.473
5
E
76.843
40
67.121
30
59.214
20
52.687
10
F
76.920
50
67.201
50
59.285
40
52.750
20
G
77.340
35
67.569
30
59.612
20
53.044
10
t
59.826
2
u
77.436
5l
H
77.667
5
67.768
5
59.722
5
53.095
3
I
77.910
5w
68.022
2
59.971
5
53.335
3
J
78.424
25
68.476
15
60.383
10
53.725
5
Levels are designated in LS coupling: The parent terms for 3d9 and for the coupled external electrons 4s4p or 4p2 are given in parentheses. A code has been attributed to the transitions to facilitate correspondence with Fig. 1. Capital letters denote 3d104s–3d94s4p transitions; lower-case letters denote 3d104p–3d94p2 transitions. Symbols: u, unresolved; w, wide; l, shaded to longer wavelengths; p, perturbed by close line; *, doubly classified. Lines for which a question mark is given have observed intensities much larger than expected; they may be blended with lines of other ionization stages. Not all the transitions are shown in Fig. 1.
Table 2
Experimental Energy Levels of the 3d94s4p Configurations of Y xi, Zr xii, Nb xiii, and Mo xiva
The deviations ΔE = Eexp − Eth are taken from the generalized least-squares treatment of the whole sequence. The percentage of the leading LS component is given. Predicted energies for the
levels are given in brackets.
*Level value based on eyepiece measurement; not used in least-squares fit.
Table 3
Fitted Scaling Factors for the Hartree–Fock Integrals
GLS fit of 3d94p2 + 3d94s4d.
GLS fit of 3d94s4p.
An equal value has been assumed for the four elements.
The same scaling factor has been assumed for G3(3d4p) and G1(3d4p).
The scaling factors are constrained to be linearly dependent on the atomic number.
Table 4
Fitted Parameter Values (in cm−1) for the 3d94s4p and 3d94p2 Configurations of Y xi, Zr xii, Nb xiii, and Mo xiv
The deviations ΔE = Eexp − Eth are taken from the generalized least-squares treatment of the whole sequence. Predicted energies for unknown levels are given in brackets. The designations are given in LS coupling with parent term of 4p2 in parentheses. The percentages of the leading eigenvector components are also given.
Leading component, (3P) 4F, 49%.
Leading component, (3P) 2D, 40%.
Leading component, (1D) 2P, 26%.
Leading component, (3P) 2P, 47%.
Leading component, (3P) 4P, 30%.
Leading component, (3P) 4F, 29%.
Leading component, (3P) 4F, 26%.
Table 7
3d104s–3d107p Transitions in Y xi, Zr xii, Nb xiii, and Mo xiv