Advances in Optical TechnologiesVolume 2012 (2012), Article ID 639126, 34 pagesdoi:10.1155/2012/639126

Research Article

Laser Spectroscopic Investigations of Praseodymium I Transitions: New Energy Levels

Zaheer Uddin,1,2,3 Driss El Bakkali,⁴ B. Gamper,¹ Shamim Khan,¹ Imran Siddiqui,1,3 G. H. Guthöhrlein,⁴ and L. Windholz¹

¹Institute for Experimental Physics, University of Technology Graz, Petersgasse 16, 8010 Graz, Austria²Department of Physics, Yanbu University College, 51000 Yanbu Al Sanaiyah, Saudi Arabia³Department of Physics, University of Karachi, 75270 Karachi, Pakistan⁴ Laboratorium für Experimentalphysik, Helmut-Schmidt-Universität, Universität der Bundeswehr Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany

Received 12 April 2012; Accepted 13 June 2012

Academic Editor: Zoran Ikonic

Copyright © 2012 Zaheer Uddin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract.

We report the discovery of about 140 new energy levels of the neutral praseodymium atom, found by means of laser-induced fluorescence spectroscopy. Their energy has been determined with an uncertainty of 0.010 cm⁻¹ using a wave number calibrated Fourier-transform spectrum.

1. Introduction

This work is a continuation of our systematic investigation of the praseodymium atomic spectrum (Pr I) with the goals of a more complete knowledge of its energy level scheme and to widen the classification of its spectral lines.

Praseodymium belongs to the rare earth elements, which have in common an open 4f electron shell. In nature one finds only one stable isotope, ¹⁴¹Pr₅₉, with the electronic ground state [Xe]4f³  6s², ⁴I°9/2 and nuclear spin quantum number I=5/2. Its nuclear magnetic dipole moment is [1], and its nuclear electric quadrupole moment Q=−0.0024b [2]. Due to the open 4f shell, Pr has a huge number of energy levels. This in turn leads to a very rich line spectrum.

In 1978, the electronic levels discovered by several authors were collected and published, see [3]. Later, great progress was achieved by Ginibre [4–6]. She evaluated high resolution Fourier transform (FT) spectra, thereby discovering a large number of electronic levels of Pr I and Pr II and determined their parities, angular momenta, and hyperfine (hf) constants. Using an atomic-beam-magnetic resonance method, hf constants of many known low-lying metastable levels were determined with high accuracy by Childs and Goodman [7]. Investigation of the hf structure of Pr I lines was performed later by Kuwamoto et al. [8], Krzykowski et al. [9], and Furmann et al. [10]. Our group has been concerned with investigations of the hf structure of Pr I lines since 1999. First values of hf constants have been published in [11]. Later on we concentrated mainly on the discovery of unknown energy levels. Some of the results are published in [12–15].

The spectrum and level structure of the Pr atom are of astrophysical interest [16, 17] and of course are indispensable for a thorough theoretical description of the level scheme [11].

2. Experimental Details

Our investigations are based on a combination of laser-induced fluorescence (LIF) and Fourier-transform (FT) spectroscopy. Spectral lines of Pr were excited by laser light, generated by means of a tunable single-frequency dye laser system. Our source of free atoms was a dc hollow cathode discharge, which produced free Pr atoms by cathode sputtering. Due to the collision processes within the Ar plasma, also high-lying Pr levels are populated, thus the laser light could excite also atoms being in states with energies of up to 25000 cm⁻¹. A detailed description of the experimental setup is given in [13].

First the laser wavelength was set to a selected value (extracted either from a wavelength table [18] or from a FT spectrum). The light emitted from the discharge was dispersed by a monochromator and detected by a photomultiplier. By scanning the monochromator wavelength, we could find laser-induced fluorescence signals with the help of a phase-sensitive Lock-In amplifier. This was possible because only laser-induced fluorescence light, emitted together with the complete Ar- and Pr-spectrum of the discharge, is modulated bearing the chopping frequency of the exciting laser beam.

Then we set the monochromator to one of the fluorescence lines and scanned the laser frequency over the hyperfine structure of the spectral line. In this way, we recorded the hf pattern of the excited transition.

3. Data Evaluation

Evaluating the recorded hf pattern, we determined the values of total angular momentum J and hyperfine constants A of the levels involved in the investigated transition (in most cases, the B-factors could be neglected due to the small quadrupole moment of the Pr nucleus). This information, together with an estimated center-of-gravity (cg) wave number of the excited transition and the measured wavelengths of all fluorescence lines, usually allowed the determination of the energy of the excited level.

In most cases, the lower level involved in the transition could be identified on the basis of J and A. Then a hypothetical upper level is introduced; its energy is calculated by adding the cg wave number to the energy of the lower level. Since the J-value of the new upper level is known from the evaluation of the observed hf structure, a list of possible transitions to known lower levels can be calculated. If this list explains the observed fluorescence lines, one can assume that a new upper level has been found.

Sometimes it turned out, that the fluorescence lines could be attributed to the decay of an already known upper level. In this case we had to assume, that the lower level of the transition is not yet known. The energy of the new lower level could be found by subtracting the cg wave number from the energy of this known upper level.

The situation was more complicated in cases where neither the lower nor the upper level of the excited transition was known, and none of the combining levels could be identified by J- and A-values (Figure 1(a)). If one of the fluorescence lines was in the wavelength range of our laser light sources, we tried to perform a second excitation at this wavelength. With some luck, we were able to identify the lower level of the new excitation. Then the energy of the unknown upper level could be determined, and in sequence, using the wave number of the first excitation, the energy of the new lower level (Figure 1(b)). If none of the fluorescence lines could be reached with our available lasers, we had to choose the following procedure: if there were more than two fluorescence lines whose wavelengths could be determined accurately, we had a chance to find the positions of the levels by explaining the wave number differences of the fluorescence lines as differences between the energies of already known levels (Figure 1(c)). Of course, we had to consider the ladders of even and odd levels separately, since we did not know the parity of the upper unknown level.

(a)

(b)

(c)

Figure 1: (a) Excitation of a transition for which both combining levels are unknown. (b) Identification of a known lower level by excitation of a former fluorescence line. (c) Finding of the lower levels of fluorescence lines by means of energy differences. See text for further details.

In 2007, we were able to record a highly resolved FT emission spectrum, which contains more than 25000 spectral lines, using our hollow cathode discharge as light source. A first analysis led to the classification of about 1200 lines as transitions between already known levels (in the wavelength range 3977 to 9878 Å) and to the discovery of 23 new levels [11]. But it turned out that this spectrum is also very helpful in improving earlier laser spectroscopic data, since a huge number of excited lines and/or lines observed as fluorescence transitions can be clearly identified in the FT spectrum due to their characteristic hf patterns. Moreover, after calculating all possible combinations from a level together with their expected hf patterns, one can have a look at the FT spectrum if these patterns appear and classify in this way spectral lines. Having determined the A-factors from the laser spectroscopic recording, the cg wavelength can be determined with an accuracy of 0.001 Å adjusting a calculated hf pattern to the pattern of the line taken from the FT spectrum. In this way, the cg wave number of the line can be determined with high accuracy. Using already corrected energy values of known levels, the energy of the new levels could be determined now with an accuracy of 0.010 cm⁻¹.

Not all of the excited transitions appear clearly in the FT spectrum. Due to the huge number of energy levels, blend situations, in which different pairs of combining levels possess the same wave number difference, are observed quite frequently. Then the corresponding hf patterns overlap, so one observes their sum curve, weighted with their relative intensities, in the FT spectrum. In such cases, it is not always possible to determine reliable cg wavelengths. It is also possible, that a transition is quite weak in the emission spectrum, thus the corresponding line has an intensity below the noise of the FT spectrum. Nevertheless, sometimes it is possible to excite such a weak transition and to observe a LIF signal with good signal-to-noise ratio (SNR). Sometimes also LIF signals can be observed having wavelengths not appearing in our FT spectrum. Most of the fluorescence decays of the new levels were clearly visible lines in the FT spectrum with high SNR. In these cases, their cg wave number could be used to determine the energy of the decaying level with good accuracy.

Only for a few new levels neither the excited nor the fluorescence lines showed up in the FT spectrum, and it was also not possible to find other lines that could be explained as transitions combining with the new level. In such cases, we used a new method to determine the excitation wavelength with high accuracy (explanation see Example 2).

4. Examples for Finding New Levels

Example 1. Level pair 12646.996(10) cm⁻¹, , even parity, (2) MHz −30304.145(10) cm⁻¹, , odd parity, (2) MHz.When exciting in the hollow cathode plasma with an estimated cg wavelength λ = 5746.49 Å, we observed an hf pattern, which could be attributed to a transition between two levels having both , , and . Fluorescence was observed on several lines, amongst them Å and 4485 Å (the reading of the monochromator is accurate to ±2 Å). None of the levels in our database possessed matching J- and A-values, thus we had to assume that for this transition two unknown levels combine. Fortunately, one of the fluorescence lines, 5919 Å, was in the range of our dye laser. Thus we tuned the monochromator, used for selecting the LIF wavelength, to the second fluorescence line  Å. The laser wavelength was then set to  Å and tuned until an LIF signal was observed (at λ = 5919.58 Å). Again the observed hf pattern was evaluated, and this time the lower level could be identified to be 13415.739 cm⁻¹, even parity, , , found by us earlier. This allowed us to calculate the energies of the combining levels of the line  Å. Later, with the help of the wave numbers and hf patterns of the fluorescence lines, we could determine the energies with high accuracy.

Example 2. Level 28889.260(10) cm⁻¹, , even parity, (1) MHz.This level was discovered when tuning the exciting laser wavelength to λ = 5826.37 Å (a small peak in the FT spectrum). A strong LIF signal was detected at wavelength  Å. The recorded hf pattern could be interpreted as transition between levels having and with and . The cg wavelength of the structure was  Å. The known lower level 11730.668 cm⁻¹, odd parity, had compatible values, and we calculated an energy of 28889.29 cm⁻¹  for a hypothetical new even parity level. The strong fluorescence line could be explained as decay to the lower level 9579.820 cm⁻¹, odd parity, . This interpretation was confirmed thereafter by three further laser excitations (λ = 5690.96, 5693.32 and 5831.69 Å). Figure 2 shows part of the FT spectrum around the line 5826.37 Å. The accuracy of the cg wavelengths is determined by our lambdameter to be 0.01 Å. This level explains one further line in the FT spectrum with respect to wavelength and hf pattern,  Å (cg wavelength from FT spectrum).When we tried to determine the energy of the level with higher precision, it turned out that we could not find suitable lines in our FT spectrum: none of the 4 excited transitions appears in the FT spectrum. The line λ = 6817.989 Å (SNR=4 in the FT spectrum) is a transition to a lower level whose energy is not accurately known, and the quite strong line λ = 5177.373 Å (SNR≈220) is blended by another strong line. Nevertheless, we tried to use the high wavelength accuracy of the FT spectrum (0.001 Å compared to 0.01 Å of our lambdameter) for a determination of the excitation wavelength. As can be noticed in Figure 3(a), the interesting wavelength is in the neighborhood of a well-resolved line (cg wavelength λ = 5826.461 Å). We scanned the laser frequency over this line and detected a strong LIF signal at Å. After having passed the first 3 strong hyperfine components of this line, we switched the monochromator to the fluorescence line Å, without interrupting the scan. Thus we obtained a recording in which the signals received on both fluorescence lines were contained next to one another (Figure 3(b)).

Figure 2: Part of the FT spectrum. Excitation cg wavelength λ =  Å. The excited hf pattern is not present in the FT spectrum. The cg wavelength of the line left of the marked range is λ = 5826.461 Å.

Figure 3: Finding of the cg wavelength of line λ = 5826.369 Å. (a) Part of the FT spectrum showing the well-resolved line λ = 5826.461 Å, but not the excited line λ = 5826.369 Å. (b) Laser spectroscopic scan over the wavelength region shown in (a). The left part (0-9000 MHz) was detected at fluorescence wavelength  Å, the right part at  Å. Each part was fitted using the hf structure constants of the corresponding combining level pairs (components outside the detected range were excluded). Lower trace: residuals between recording and fit, magnified by a factor 3.5. From the frequency difference between the centers of gravity, we could find the unknown excitation wavelength λ = 5826.369 Å. (c) Hyperfine level scheme of the line λ = 5826.461 Å. (d) Hyperfine level scheme of the line λ = 5826.369 Å.

Using our fit program and the known hf constants of all 4 involved levels, it was possible to find the wave number difference of the cg’s of both lines with high precision. By adding this value to the cg wave number of the line λ = 5826.461 Å, we were able to find an accurate value for the cg wave number of the excitation to level 28889 cm⁻¹. The corresponding wavelength is λ = 5826.369(1) Å. With the new cg wave number, the energy of the new level was determined to be 28889.260(10) cm⁻¹. For confirmation, similar procedures were performed with two other excitations, and we found the wavelengths λ = 5831.692 and λ = 5693.323 Å, which both confirmed the energy of this new level.

5. Results

In Table 1 we report data of low-lying even levels, discovered as lower levels of excited transitions. In columns 1 to 3, values of J, the energy, and the A-factor are given. Columns 4–6 contain all lines known to us who can be classified with help of this level. The wavelength in column 4 is given with 3 digits after the decimal point if it is extracted from our FT spectrum. Two digits are given for excitation wavelengths measured with help of our lambdameter (accuracy 0.01 Å). For fluorescence lines having SNR=1, the wavelengths calculated from the level energies are given. All wavelengths are given in air. In column 5, a comment is entered: nl means that it is a new line, not contained in commonly used spectral tables (e.g., [18]). If cl is given, it is an already known line which could be classified with help of the new level. e indicates that the line was excited, f that it was observed as a fluorescence line after excitation of the upper combining level. In column 6 the SNR of the line in our FT spectrum is given. If there is given SNR=1, the line does not appear in the FT spectrum, but was observed as excited (comment e) or as fluorescence line (comment f). In columns 7 to 11, information on the combining upper level is entered. The citations in column 11 refer to the A- and B-values of columns 9 and 10. If a line of column 4 was excited, we additionally give in columns 12 to 16 information concerning the observed fluorescence line(s). nl and cl in column 13 have the same meaning as in column 5.

Table 1: New even levels discovered as lower levels of the excited transitions.

New even lower level

Investigated/observed spectral line
Combining odd upper level

Observed fluorescencedecay of the odd upper level
Final level of the decay

Energy/cm⁻¹
A/MHz
λ/Å
C.
SNR

Energy/cm⁻¹
A/MHz
B/MHz
Ref. to columns 9 and 10
λ/Å
C.
SNR

Energy/cm⁻¹

3/2
12051.488
1071 (3)
4548.484
nl
4
5/2
34030.654
704 (2)
—
[19]

4716.39
nl, f
1
3/2
33248.19
860 (8)

[13]

4809.56
nl, e
1
1/2
32837.514
−20 (10)
—
[19]
5047.996
nl
1
3/2
13033.280

4897.184
nl
4
5/2
32465.793
598 (2)
—
[19]

5143.41
nl, e
1
1/2
31488.533
74 (5)
—
[19]
4577.773
nl
1
3/2
9649.970

5181.917
nl, f
1
3/2
31343.998
1123 (3)
—
This work

5342.725
nl
12
5/2
30763.323
981 (2)
—
This work

5448.506
nl, f
1
1/2
30400.042
1890 (10)

[13]

5457.12
nl, f
1
3/2
30371.081
535 (4)

[13]

5477.134
nl, f
8
5/2
30304.145
818 (2)
—
This work

5518.794
nl, f
14
3/2
30166.356
1106 (4)

[13]

5616.551
nl
7
5/2
29851.062
922 (7)

[13]

5729.86
nl, e
1
3/2
29499.100
260 (5)

[13]
4337.685
nl
3
5/2
6451.808

5779.18
nl, e
1
3/2
29350.190
584 (4)

[13]
5090.336
cl
12
5/2
9710.600

5781.93
nl, e
1
1/2
29341.96
915 (7)

[13]
5720.195
nl
6
1/2
11864.887

5833.12
nl, e
1
3/2
29190.205
553 (1)
0 (10)
This work
5444.773
nl
15
5/2
10829.070

5837.356
nl
8
3/2
29177.805
655 (3)

[19]

6429.72
nl, e
1
1/2
27599.953
2039 (6)

[13]
5569.489
nl
16
3/2
9649.970

7520.74
nl, e
1
5/2
25344.394
692 (2)
0 (10)
[19]
5315.176
cl
55
7/2
6535.572

8866.58
nl, e
1
5/2
23326.729
415 (1)
30 (15)
[19]
5924.318
nl
10
5/2
6451.808

9084.938
nl
10
3/2
23055.698
−280 (2)

This work

9246.821
cl
13
5/2
22863.048
502 (4)

[13]

5/2
12646.996
892 (2)
4923.423
nl
3
7/2
32952.378
838 (2)
—
[19]

5178.994
nl
5
7/2
31950.447
784 (2)
—
[19]

5299.097
nl
8
3/2
31512.878
649 (3)
—
[19]

5308.651
cl
11
7/2
31478.935
731 (6)

This work

5661.86
nl, e
1
5/2
30304.145
818 (2)
—
This work
4854.534
nl
4
5/2
9710.600

5700.74
nl, e
1
7/2
30183.720
600 (4)

This work
5042.225
nl
8
9/2
10356.737

5949.52
e
15
7/2
29450.410
783 (6)

This work
4231.161
nl
7
9/2
5822.890

7429.512
nl
5
5/2
26103.121
904 (3)
—
[19]

9337.905
cl
6
7/2
23353.101
862 (3)

This work

9586.286
cl
15
5/2
23075.703
428 (2)
—
[19]

9812.968
cl
8
7/2
22834.799
1227 (3)
—
[19]

9965.499
cl
18
5/2
22678.865
580 (2)

This work

11/2
12658.401
995 (5)
4941.41
nl, e
1
11/2
32889.914
694 (3)
—
[19]
3693.482
cl
12
9/2
5822.890

5052.605
nl, f
1
11/2
32444.655
697 (2)

This work

5266.366
nl
12
13/2
31641.543
735 (2)
—
[19]

5288.376
nl, f
1
11/2
31562.535
665 (8)

This work

5368.993
nl, f
17
13/2
31278.686
662.8 (40)

[10]

5384.011
nl
9
13/2
31226.756
641.4 (20)
—
[10]

5643.521
nl, f
1
9/2
30372.918
830 (3)

This work

5671.81
nl, e
1
13/2
30284.567
681 (2)
—
This work
4850.767
cl
6
11/2
9675.029

5720.274
nl, e
9
13/2
30135.234
587 (6)

This work

5728.21
nl, e
1
11/2
30111.020
786 (2)
—
This work
4252.777
nl
6
13/2
6603.591

5733.53
nl, e
1
11/2
30094.834
825 (2)
—
This work
5394.551
nl
1
13/2
11562.762

5747.20
nl, e
1
11/2
30053.346
759 (2)
—
This work
5220.665
nl
14
11/2
10904.034

5765.104
nl, e
10
13/2
29999.333
681 (1)
—
[19]
4872.926
cl
20
11/2
9483.518

5788.33
nl, e
1
9/2
29929.748
934 (3)
—
[19]
5254.583
nl
21
11/2
10904.034

5800.05
nl, e
1
13/2
29894.855
537 (3)
—
[19]
3994.341
nl
20
11/2
4866.515

6315.678
nl, e
1
13/2
28487.636
672 (2)
—
This work
4967.870
cl
60
15/2
8363.901

6389.825
cl
11
13/2
28303.954
600 (3)
—
[19]

7446.558
nl, e
3
9/2
26083.725
929 (1)
—
[5]
4711.836

70
11/2
4866.515

7627.381
nl
3
13/2
25765.475
582 (3)

This work

8453.073
nl
6
9/2
24485.172
1105 (3)

This work

8509.730
cl
7
11/2
24406.428
559 (5)
—
[5]

8581.240
cl
10
9/2
24308.530
535 (1)
−3 (4)
[8]

9078.497
cl
8
11/2
23670.416
535 (3)
—
[19]

9280.772
cl
9
9/2
23430.407
561 (1)
—
[19]

7/2
13415.739
797 (2)
4542.707
nl
4
9/2
35422.868
569 (3)

[19]

5039.718
nl
12
5/2
33252.618
684 (2)

This work

5356.994
nl, f
6
7/2
32077.740
651 (2)

This work

5392.35
nl, f
1
9/2
31955.363
760 (2)

This work

5477.231
nl
9
7/2
31668.068
852 (3)
—
This work

5544.107
nl
6
9/2
31447.902
665 (1)
—
This work

5828.51
nl, e
1
5/2
30568.035
735 (3)

[13]
4355.961
nl
4
7/2
7617.440

5919.58
nl, e
1
5/2
30304.145
818 (2)
—
This work
5277.699
nl
5
3/2
11361.762

6419.42
nl, e
1
7/2
28989.170
959 (3)
—
[19]
4315.405
nl
24
9/2
5822.890

7736.765
nl, e
1
9/2
26337.481
810 (1)
—
[19]
4873.218
cl
20
9/2
5822.890

7821.265
nl, e
1
5/2
26197.878
1201 (3)
—
[19]
5084.456

300
7/2
6535.572

8489.433
nl
19
5/2
25191.854
925 (4)

[13]

9110.822
nl
12
5/2
24388.695
1116 (2)

This work

9273.537
cl
12
9/2
24196.152
714 (4)

This work

9504.223
cl
9
9/2
23934.491
786 (2)

This work

9534.246
nl
10
7/2
23901.371
640 (2)

This work

9698.774
cl
7
7/2
23723.500
815 (5)
—
This work

9789.259
cl
9
7/2
23628.218
562 (2)

This work

9804.987
cl
7
7/2
23611.834
270 (2)

This work

C: comment; nl: new line, not listed in commonly used wavelength tables; cl: classification of a “known” line (i.e., listed as praseodymium line but not yet classified); e: excited line; f: observed as fluorescence line.

Table 2 contains data of low-lying odd levels, discovered as lower levels of excited transitions, and is built similar to Table 1.

Table 2: New odd levels discovered as lower levels of the excited transitions.

New odd lower level
Investigated/observed spectral line
Combining even upper level
Observed fluorescence decay of the even upper level
Final level of the decay

Energy/cm⁻¹
A/MHz
λ/Å
C.
SNR

Energy/cm⁻¹
A/MHz
Ref. To Col. 9
λ/Å
C.
SNR

Energy/cm⁻¹

3/2
11992.788
225 (2)
5592.594
nl
30
5/2
29868.604
805 (1)
This work

5612.128
nl, f
1
5/2
29806.394
779 (3)
This work

+

5635.687
e
40
5/2
29731.957
774 (3)
This work
4818.968
cl
10
3/2
8986.421

5703.786
e
30
3/2
29520.139
24 (5)
This work
4868.681
cl
15
3/2
8986.421

5746.61
nl, e
1
5/2
29389.516
749 (2)
This work
5089.150
cl
30
5/2
9745.334

5798.372
e
38
3/2
29234.227
1038 (4)
[13]
5525.571
nl
20
5/2
11141.576

5832.58
nl, e
1
5/2
29133.111
684 (3)
[19]
4962.215
cl
23
3/2
8986.421

5882.885

32
3/2
28986.540
637 (4)
[13]

5916.167
e
30
5/2
28890.950
765 (4)
[13]
5022.587
cl
37
3/2
8986.421

6188.963
nl
20
3/2
28146.114
874 (4)
This work

6251.794
nl, f
1
3/2
27983.773
723 (5)
[13]

6416.478
nl, f
5
5/2
27573.343
747 (3)
[13]

6458.657
e
10
5/2
27471.606
755 (4)
[13]
5408.240
nl
22
3/2
8986.421

6551.942
nl
6
5/2
27251.230
335 (6)
[13]

13/2
15347.431
674 (2)
5359.55
nl, f
5
15/2
34000.50
462 (2)
This work

5415.298

10
15/2
33808.503
480 (6)
This work

5632.008
e
10
15/2
33098.154
480 (1)
This work
5454.430
nl
6
15/2
14769.529

5658.46
nl, f
1
13/2
33015.188
570 (2)
This work

5786.87
nl, e
1
13/2
32623.126
591 (2)
This work
5434.186
nl
1
11/2
14226.220

5824.04
nl, e
1
13/2
32512.894
595 (15)
This work
4872.926
cl
20
11/2
9483.518

5847.09
nl, e
1
13/2
32445.227
666 (1)
This work
6155.861
cl
14
13/2
16205.041

5868.310
nl, e
12
15/2
32383.385
573 (2)
This work
3570.114
nl
9
15/2
4381.072

5871.61
nl, e
1
11/2
32373.816
660 (1)
This work
4906.194
cl
12
11/2
11997.137

5884.389
e
18
15/2
32336.849
475 (2)
This work
5747.837
nl
30
17/2
14943.825

5896.28
e
6
13/2
32302.560
571 (3)
This work
3393.941
nl
12
13/2
2846.741

6044.092
e
9
15/2
31887.920
563 (4)
This work
3442.400
nl
15
13/2
2846.741

6253.81
nl, e
6
13/2
31333.250
576 (4)
This work
5554.82
nl
18
13/2
13335.868

6265.263
nl
7
13/2
31304.033
622 (1)
This work

6297.43
nl, e
1
11/2
31222.519
596 (6)
This work
5025.4
nl
4
9/2
11329.696

6353.15
nl, f
1
11/2
31083.290
620 (2)
This work

6455.085
nl
7
13/2
30834.807
666 (1)
This work

6502.304
e
6
13/2
30722.335
679 (4)
This work
3586.348
nl
4
13/2
2846.741

6554.134

9
13/2
30600.763
656 (2)
This work

6693.514

5
15/2
30283.139
475 (5)
[19]

6711.57
nl
1
15/2
30242.928
462 (5)
This work

6966.875
nl
6
11/2
29697.090
784 (3)
[19]

9000.200
nl
10
13/2
26455.240
637 (5)
[5]

9080.342
nl
5
11/2
26357.200
745 (5)
[5]

15/2
15399.063
889 (2)
5430.487
nl
3
15/2
33808.503
480 (6)
This work

5643.260

32
17/2
33114.399
422 (2)
This work

5648.44
nl, e
1
15/2
33098.154
480 (2)
This work
5917.931
cl
10
13/2
16205.041

5704.20
nl, e
1
17/2
32925.138
562 (2)
This work
5559.785
nl
5
17/2
14943.825

5886.15
nl, f
1
15/2
32383.385
573 (2)
This work

5902.322
nl, e
6
15/2
32336.849
475 (2)
This work
5690.809
nl
15
15/2
14769.529

6063.02
nl, e
1
15/2
31887.920
563 (4)
This work
3442.400
nl
15
13/2
2846.741

6195.60
nl, e
1
13/2
31535.092
509 (3)
This work
3314.865
nl
5
11/2
1376.602

6298.97
nl, f
1
15/2
31270.290
579 (2)
This work

6424.668
nl
8
15/2
30959.764
573 (5)
This work

15/2
16180.200
883 (2)
5651.35
nl
5
13/2
33870.186
594 (3)
This work

5851.804
nl
6
17/2
33264.211
545 (2)
This work

6399.562

19
17/2
31801.951
503 (3)
This work

6429.23
nl
4
13/2
31729.874
432 (2)
This work

6567.346
nl, e
1
15/2
31402.846
631 (2)
This work
5918.088
cl
10
15/2
13565.490

6625.036
nl, e
5
15/2
31270.290
579 (2)
This work
5557.136
nl
8
17/2
13280.404

8009.742
nl
3
15/2
28661.560
550 (2)
This work

13/2
16205.041
732 (3)
5554.308

20
15/2
34204.080
442 (2)
This work

5617.85
nl, e
l
15/2
34000.515
462 (2)
This work
5359.557
nl
1
13/2
15347.431

5663.129
nl
8
15/2
33858.230
467 (5)
This work

5679.13
nl, e
1
15/2
33808.503
480 (6)
This work
5506.819
cl
50
13/2
15654.235

5917.931
e
10
15/2
33098.154
480 (2)
This work
5506.798
cl
17
17/2
14943.825

5947.143
nl, f
10
13/2
33015.188
570 (2)
This work

6050.93
nl, e
1
13/2
32726.817
565 (3)
This work
5554.632
nl
4
11/2
14728.843

6071.057
nl, e
10
11/2
32672.078
529 (3)
This work
4835.418
cl
17
11/2
11997.137

6155.861

14
13/2
32445.227
666 (1)
This work

6179.393
f
7
15/2
32383.385
573 (2)
This work

6374.618
nl, f
10
15/2
31887.920
563 (4)
This work

C: Comment; nl: new line, not listed in commonly used wavelength tables; cl: classification of a “known” line (i.e., listed as praseodymium line but not yet classified); e: excited line; f: observed as fluorescence line.

In Table 3 all levels discovered as upper levels are listed, divided in two groups: even parity and odd parity. Within each group, the levels are sorted with respect to J (column 1) and for each J with increasing energy (column 2). Column 3 contains the A-factor and column 4 the B-factor if we were able to determine it reliably. In column 5, excitation wavelengths are given (not more than 2) and in column 6 fluorescence wavelengths (not more than 2).

Table 3: New levels discovered as upper levels of the excited transitions.

Energy/cm⁻¹
A/MHz
B/MHz
λ exc./Å
λ fl./Å

New even levels

5/2
27993.770
754 (2)

5765.513, 5932.304
6361.250

29389.516
749 (2)

5746.61, 5842.38
5089.150

29806.394
779 (3)

5703.42, 5920.05
4801.743, 5164.812

30123.235
657 (1)

5811.02, 5920.20
4905.908, 5081.628

30590.721
622 (2)

5760.72, 5891.36
4988.161

30963.451
661 (2)

5764.73, 5881.14
4873.488

31299.695
800 (3)

5767.06, 5781.93
4794.892

7/2
28412.971
1025 (3)

5720.439, 5788.313
4958.234, 5629.412

29468.524
623 (2)

5739.401, 5758.885
5313.584, 6005.252

30461.496
692 (3)

5667.216, 5843.786
4787.551

31005.715
692 (2)

5750.72, 5866.55
4665.944, 5080.914

32070.559
668 (2)

5700.92, 5881.09
4820.053, 5995.548

32166.080
736 (2)

5670.03, 5695.74
4797.956

9/2
24706.503
975 (2)
−5 (5)
4285.139, 6012.973
6074.993

28883.730
835 (2)

5719.002, 5938.79
5178.856, 5570.391

28936.490
615 (2)

5701.793, 7082.750
5554.061, 5675.712

29340.605
530 (2)

6087.97, 6207.92
4875.446, 5059.117

29523.953
647 (2)

5796.830, 5985.32
5012.608

29698.580
629 (2)

5664.587, 5714.56
5193.739

29766.734
699 (2)

5899.57, 5919.355
4952.322

29980.012
672 (2)

5826.24, 5859.80
5624.088

30232.222
737 (2)

5741.84, 5925.44
4840.699

30356.677
788 (2)

5733.22, 5882.05
4811.703

30447.257
695 (2)

4999.286, 5703.59
4790.816, 6081.770

30625.599
643 (1)
25 (50)
5788.26, 5790.43
3264.301, 4750.218

31677.736
433 (2)

5728.571, 5831.55
4913.107

32402.860
544 (2)

5768.327, 5878.396
4553.938, 4744.046

11/2
28889.260
639 (1)
40 (50)
5693.32, 5826.37
5177.373

29071.100
635 (2)

5765.268, 5933.423
6173.640

29128.761
544 (2)

5746.121, 5751.336
5340.960

29377.729
683 (3)

5665.093, 5751.95
5049.631

29718.506
660 (1)

5708.06, 5713.87
4964.182, 5177.821

31010.172
705 (2)

5875.80, 5878.00
5079.762

31664.262
601 (2)

5733.00, 5827.91
4916.362, 5903.148

31771.680
718 (2)

5799.77, 5865.94
5055.597

31900.665
525 (2)

5748.69, 5821.88
5385.041

32373.816
660 (2)

5724.69, 5871.61
4906.194

13/2
19654.709
800 (2)

5947.91
5469.506

29051.938
540 (2)

5776.87, 5799.77
5933.903, 5940.178

29111.856
581 (3)

5779.674, 5919.103
3806.251

30600.763
656 (2)

6314.88, 6586.72
5439.581, 5640.794

32623.126
591 (2)

5678.62, 5786.874
5434.186

15/2
27265.604
738 (3)

5931.364, 6470.303
4368.535

31402.846
631 (2)

5918.099, 6166.705
6166.957

32336.849
475 (2)

5690.809, 5911.88
5884.389

33098.154
480 (2)

5648.44, 5657.19
5454.430, 5506.798

17/2
30826.745
580 (2)

5608.63, 5791.715
5244.434, 5590.891

30848.885
507 (1)

5690.43, 6385.226
5238.350, 5583.974

19/2
29309.810
434 (1)

5697.855, 5746.624
6236.808,6889.914

30466.597
403 (3)

5705.81, 5789.467
6199.288

New odd levels

85

3/2
29190.205
553 (1)
0 (10)
5698.408, 6350.60
5132.144, 5444.773

29804.574
1115 (4)

5916.390, 8035.004
5347.001, 5420.660

31343.998
1123 (3)

5715.42, 5833.47
4422.278, 4621.188

5/2
28800.063
1057 (2)

5704.28, 5769.52
5220.453

28920.891
1012 (3)

5665.220, 5693.46
4465.960

29075.845
829 (2)

5743.208, 5871.61
4435.258

30304.145
818 (2)

5661.86, 5919.58
5277.699, 5477.134

30679.627
933 (2)

5695.81, 5721.43
4766.274

30763.323
981 (2)

5668.78, 5694.15
4538.864

7/2
24899.621
961 (2)

5920.24
4884.455

25172.325
708 (2)

5826.151, 5831.653
5364.250

26371.971
997 (3)

6549.43, 6582.51
5039.832, 5330.562

27096.093
918 (3)

6470.79, 6498.944
5132.395, 5238.807

28204.331
781 (5)

6467.24, 7764.48
4205.426, 4466.734

28339.709
798 (2)

5709.230, 5739.15
4918.284

28525.358
843 (2)

5739.705, 5795.12
4403.570, 5453.846

28859.879
538 (2)

5749.67, 5807.763
4339.625, 5060.635

28978.464
1047 (3)

5736.02, 5768.02
4839.335

29579.960
720 (2)

5702.76, 5792.82
4338.231

29675.405
865 (1)

5671.88, 5681.28
5005.949

30975.616
734 (2)

5703.705, 5843.45
5031.837, 5051.337

31668.068
852 (2)

5673.09, 5747.12
4969.170, 5100.550

34243.714
655 (2)

5763.922
3608.018, 4734.423

9/2
25634.179
674 (1)

5673.44, 5774.092
4715.227

26337.481
810 (1)

7736.76, 7935.73
4563.835, 4873.218

26718.738
826 (2)

5729.066, 5875.89
4997.468

27394.138
792 (3)

6470.73, 6522.91
4742.301, 4792.854

27745.272
862 (2)

5696.259, 5749.322
4753.538, 5363.244

28579.596
765 (2)
40 (50)
5661.189, 5747.116
5014.710, 5061.743

29149.204
730 (1)

4377.825, 5785.463
5028.688

30035.792
884 (2)

5707.45, 5739.56
4459.377, 4813.971

30896.170
733 (2)

5781.92, 5841.280
3987.182, 4371.907

30901.231
730 (2)

5780.229, 5839.55
4370.938, 4491.623

31447.902
665 (2)

5744.87, 5887.789
4866.273

31528.624
746 (2)

5789.76, 5793.565
5531.149

33687.796
744 (2)

5691.05, 5764.22
3468.665

11/2
25900.352
858 (2)

5686.67, 5856.16
4656.763

26159.533
672 (3)

5707.577, 5861.933
4915.860

29195.032
805 (2)

5718.648, 5894.447
4705.958, 5581.246

29614.075
900 (5)

5697.63, 5714.00
4614.926, 4966.186

29985.372
775 (2)

5799.086, 7848.97
5222.124, 5239.264

30053.346
759 (2)

5701.741, 5747.20
5052.454, 5220.665

30094.834
825 (2)

5733.53, 5762.500
5314.286, 5394.551

30111.020
786 (2)

5728.21, 5757.13
4252.777, 4272.879

30347.477
700 (3)

6430.416, 6470.81
4836.005, 5029.500

31895.205
668 (2)

5910.73, 5938.70
3698.720

32289.455
665 (1)

5716.368, 5806.88
5458.571

32513.960
655 (2)

5643.92, 5786.83
4535.186, 4749.025

13/2
24781.116
858 (2)
−20 (10)
5828.953, 5940.199
5588.731

28487.636
672 (2)

5685.54, 6561.17
4967.870, 5201.762

28851.007
584 (2)

5690.540, 5756.26
5437.904

28921.386
697 (2)

5726.28, 5733.026
4959.956

29663.117
651 (3)

5698.02, 5736.137
4693.694

29774.999
615 (2)

5661.92, 5704.72
4758.430

29836.950
535 (2)

5679.492, 5684.625
5388.150

30284.567
681 (2)

5671.81, 5719.21
4994.092, 5317.344

30412.010
658 (2)

5825.433, 5868.635
5442.042, 5499.812

30562.652
537 (1)

5703.92, 5740.23
4742.700, 4964.105

30644.652
628 (2)

5789.57, 5810.44
4943.974

31005.761
586 (2)

5761.69, 5834.90
4867.409, 5141.807

32608.542
620 (3)

5701.20, 5800.11
3844.331, 4515.808

33052.848
555 (2)

5785.33, 5860.70
3982.695

33932.700
737 (1)

5667.90, 5709.27
5165.634, 5260.914

15/2
26332.040
506 (2)
−45 (5)
5926.883, 5691.075
5345.561

27294.906
790 (5)

6314.57, 7709.96
5280.870

27950.530
824 (1)

5703.941, 6314.40
5210.956, 5407.968

28754.446
639 (2)

5781.568, 5788.44
5466.620

29094.822
634 (2)

5702.23, 5751.989
4728.263

29942.851
583 (2)

5650.598, 5810.239
4949.732, 5150.310

29989.064
528 (2)

5794.67, 5817.55
5570.287

30788.090
528 (2)

5762.395, 5834.890
4919.547

31039.972
553 (1)

5689.099, 5750.352
4091.104, 4860.176

31668.549
544 (2)

5729.96, 5919.86
5625.687

31817.886
437 (2)

5716.08, 5762.81
4911.429, 4916.388

32672.439
601 (2)

5680.510, 5778.688
5014.698, 5031.823

32849.815
540 (2)

5720.040, 5735.74
4467.124, 5623.828

17/2
25909.173
854 (2)
−45 (5)
5697.960, 5831.453
5831.453, 5697.960

27844.889
602 (2)
−40 (50)
5752.739, 5774.425
5239.809

29622.951
501 (1)
15 (20)
5754.650, 5920.309
5035.700, 5412.236

29899.954
529 (1)

5664.331, 5847.876
5161.717, 6143.342

30346.200
518 (1)

5699.110, 5913.005
5913.005, 5699.110

31270.847
512 (2)

5798.136, 5863.62
4820.511, 4968.937

33305.483
450 (2)

6404.22, 6470.68
5775.171, 6231.393

35453.400
595 (1)

5820.62, 5848.02
3888.734, 5629.604

19/2
29950.715
418 (2)

5783.441, 5807.582
5482.025

21/2
30543.982
392 (2)

5909.466, 6801.441
5155.184, 5591.534

32741.057
332 (2)

5917.00
5230.205

Table 4 contains detailed information concerned with the new even levels. The table is built analogously to Table 1 (but here the columns 12 to 16 of Table 1 are not needed).

Table 4: Spectral lines explained by the new even levels.

New upper even level
Line
Combining known lower odd level

Energy/cm⁻¹
A/MHz
B/MHz
/Å
C.
SNR

Energy/cm⁻¹
A/MHz
B/MHz
Reference to col. 10, 11

13/2
19654.709
800 (2)

5469.506
f
190
11/2
1376.602
730.393
−11.877
[7]

5947.91
nl, e
5
13/2
2846.741
613.240
−12.850
[7]

6545.421

30
15/2
4381.072
541.575
−14.558
[7]

9/2
24706.503
975 (2)

4285.139
nl, e
11
11/2
1376.602
730.393
−11.877
[7]

6012.973
nl, e
12
11/2
8080.402
238.352
−22.961
[7]

6074.993
f
135
9/2
8250.141
213.531
−4.136
[7]

7003.424

16
11/2
10431.716
701.7 (5)
−10 (7)
[9]

15/2
27265.604
738 (3)

4368.535
nl, f
8
15/2
4381.072
541.575
−14.558
[7]

5394.523
nl
11
13/2
8733.440
854.297
−31.807
[7]

5931.364
e
17
13/2
10410.745
655.9 (3)
−29 (7)
[8]

6023.642
f
70
15/2
10668.950
951.310
−2.670
[7]

6441.818

55
13/2
11746.328
401 (1)
50 (20)
[19]

6470.303
nl,e
12
15/2
11814.647
355 (2)
0 (10)
[19]

6645.548

24
13/2
12222.091
1133 (4)
—
This work

7837.664
nl
4
13/2
14510.207
1085 (2)
—
This work

5/2
27993.770
754 (2)

5765.513
e
20
7/2
10654.070
169 (2)
—
[19]

5932.304
e
25
5/2
11141.576
169 (2)
—
[19]

6025.783
nl
8
7/2
11403.011
1142 (3)
—
[19]

6293.545
nl
5
5/2
12108.867
1275 (2)
—
[19]

6361.250
nl
15
7/2
12277.935
1760 (4)
—
[19]

7148.782
nl
4
7/2
14009.225
1100 (1)
—
[19]

7/2
28412.971
1025 (3)

3518.513
nl
16
9/2
0.000
926.209
−11.878
[7]

4958.234
nl, f
6
9/2
8250.141
213.531
−4.136
[7]

5629.412
f
45
7/2
10654.070
169 (2)
—
[19]

5720.439
e
90
9/2
10936.652
930 (1)
0 (10)
[19]

5788.313
e
75
5/2
11141.576
169 (2)
—
[19]

5877.279

18
7/2
11403.011
1142 (3)
—
[19]

9/2
28883.730
835 (2)

5178.856
nl, f
14
9/2
9579.820
789 (1)
—
[19]

5570.391
nl, f
25
9/2
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930 (1)
0 (10)
[19]

5719.002
e
48
7/2
11403.011
1142 (3)
—
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5938.79
nl, e
1
9/2
12049.942
275 (2)
—
[19]

6020.327
nl, f
1
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12277.935
1760 (4)
—
[19]

6223.887
nl, f
6
9/2
12821.044
1127 (3)
—
[19]

6262.198
nl, f
12
7/2
12919.316
180 (2)
—
[19]

6440.183
nl, f
1
11/2
13360.511
151 (3)
—
[19]

11/2
28889.260
639 (1)
40 (50)
5177.373
f
220
9/2
9579.820
789 (1)
—
[19]

5690.96
nl, e
1
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1272 (1)
75 (50)
[19]

5693.32
nl, e
1
9/2
11329.696
530 (3)
—
[19]

5826.37
nl, e
1
9/2
11730.668
1365 (5)
—
[19]

5831.69
nl, e
1
13/2
11746.328
401 (1)
50 (20)
[19]

5918.27
nl, e
1
11/2
11997.137
585 (3)
—
[19]

6817.989
nl
4
11/2
14226.220
869 (3)
—
[19]

9/2
28936.490
615 (2)

5554.061
nl, f
12
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10936.652
930 (1)
0 (10)
[19]

5675.712
nl, f
1
11/2
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1272 (1)
75 (50)
[19]

5701.793
nl, e, f
16
7/2
11403.011
1142 (3)
—
[19]

5920.23
nl, e
1
9/2
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275 (2)
—
[19]

6203.512
f
13
9/2
12821.044
1127 (3)
—
[19]

6225.390
nl, f
1
11/2
12877.682
1139 (2)
—
[19]

6694.189
f
23
11/2
14002.294
566 (1)
—
[19]

−125 (50)

7082.750
e, f
34
11/2
14821.565
544 (2)

This work

13/2
29051.938
540 (2)

3612.294
nl
3
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1376.602
730.393
−11.877
[7]

3814.953
nl
4
13/2
2846.741
613.240
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[7]

5776.87
nl, e
8
13/2
11746.328
401 (1)
50 (20)
[19]

5799.77
nl, e
1
15/2
11814.647
355 (2)
0 (10)
[19]

5933.903
nl, f
38
11/2
12204.286
1010 (2)
—
This work

5940.178
f
35
13/2
12222.091
1133 (4)
—
This work

6455.473
nl, e
10
15/2
13565.490
917 (1)
10 (10)
[19]

11/2
29071.100
635 (2)

5765.268
nl, e
5
9/2
11730.668
1365 (5)
—
[19]

5873.411
nl, e
5
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275 (2)
—
[19]

5927.159
nl
6
11/2
12204.286
1010 (2)
—
This work

5933.423
nl, e
30
13/2
12222.091
1133 (4)
—
This work

6152.120
nl
6
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12821.044
1127 (3)
—
[19]

6173.640
nl, f
40
11/2
12877.682
1139 (2)
—
[19]

6360.753

12
9/2
13354.043
1272 (3)
—
[19]

13/2
29111.856
581 (3)

3604.491
nl
4
11/2
1376.602
730.393
−11.877
[7]

3806.251
nl, f
10
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[7]

5420.630
nl
15
15/2
10668.950
951.310
−2.670
[7]

5779.674
nl, e
5
15/2
11814.647
355 (2)
0 (10)
[19]

5919.103
nl, e
15
13/2
12222.091
1133 (4)
—
This work

6158.141
f
19
11/2
12877.682
1139 (2)
—
[19]

11/2
29128.761
544 (2)

3432.049
nl
26
9/2
0.000
926.209
−11.878
[7]

5340.960
f
37
13/2
10410.745
655.9 (3)
−29 (7)
[8]

5746.121
nl, e
22
9/2
11730.668
1365 (5)
—
[19]

5751.336
nl, e
6
13/2
11746.328
401 (1)
50 (20)
[19]

5853.578
nl
5
9/2
12049.942
275 (2)
—
[19]

19/2
29309.810
434 (1)

5697.855
e
5
17/2
11764.216
892.5 (7)
−10 (25)
[9]

5746.624
e
55
19/2
11913.115
829.9 (2)
2 (8)
[9]

6236.808
f
105
17/2
13280.404
208 (2)
20 (50)
[19]

6889.914
f
23
19/2
14799.842
126 (5)
—
[19]

8593.623

5
17/2
17676.472
856 (2)
—
This work

9477.685

12
19/2
18761.608
870 (1)
—
This work

9/2
29340.605
530 (2)

4875.446
nl, f
1
11/2
8835.389
949.091
−13.721
[7]

5059.117
f
11
9/2
9579.820
789 (1)
—
[19]

5548.412
nl, f
18
11/2
11322.443
1272 (1)
75 (50)
[19]

5833.94
nl
1
11/2
12204.286
1010 (2)
—
This work

6087.97
nl, e
1
7/2
12919.316
180 (2)
—
[19]

6207.92
nl, e
1
7/2
13236.606
726 (1)
—
[19]

6614.387
nl, e
1
11/2
14226.220
869 (3)
—
[19]

11/2
29377.729
683 (3)

5049.631
f
120
9/2
9579.820
789 (1)
—
[19]

5276.688
nl
8
11/2
10431.716
701.7 (5)
−10 (7)
[9]

5665.093
nl, e
15
9/2
11730.668
1365 (5)
—
[19]

5751.95
nl, e
1
11/2
11997.137
585 (3)
—
[19]

6239.035
nl
5
9/2
13354.043
1272 (3)
—
[19]

5/2
29389.516
749 (2)

4899.854
nl
10
3/2
8986.443
1029 (3)
—
This work

5089.150
f
30
5/2
9745.334
626 (1)
5 (3)
[4]

5746.61
nl, e
1
3/2
11992.788
225 (5)
—
This work

5842.38
nl, e
1
7/2
12277.935
1760 (4)
—
[19]

7/2
29468.524
623 (2)

5313.584
nl, f
1
7/2
10654.070
169 (2)
—
This work

5394.610
nl
10
9/2
10936.652
930 (1)
0 (10)
[19]

5511.504
nl
10
9/2
11329.696
530 (3)
—
[19]

5739.401
e
45
9/2
12049.942
275 (2)
—
[19]

5758.885
nl, e
4
5/2
12108.867
1275 (2)
—
[19]

6005.252
nl, f
5
9/2
12821.044
1127 (3)
—
[19]

6040.912
nl, f
1
7/2
12919.316
180 (2)
—
[19]

6308.548
nl, f
1
7/2
13621.400
879 (1)
−10 (10)
This work

9/2
29523.953
647 (2)

5012.608
f
35
9/2
9579.820
789 (1)
—
[19]

5772.18
nl, e
1
11/2
12204.286
1010 (2)
—
This work

5796.830
nl, e
10
7/2
12277.935
1760 (4)
—
[19]

5985.32
nl, e
1
9/2
12821.044
1127 (3)
—
[19]

6005.688

20
11/2
12877.682
1139 (2)
—
[19]

9/2
29698.580
629 (2)

5193.739
f
25
7/2
10449.997
541 (2)
—
[19]

5664.587
e
15
9/2
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275 (2)
—
[19]

5714.56
nl, e
1
11/2
12204.286
1010 (2)
—
This work

5923.396
nl
35
9/2
12821.044
1127 (3)
—
[19]

6118.984

8
11/2
13360.511
151 (3)
—
[19]

6218.279

12
7/2
13621.400
879 (1)
−10 (10)
This work

6719.928
nl
6
11/2
14821.565
544 (2)

This work

11/2
29718.506
660 (1)

3363.940
nl
53
9/2
0.000
926.209
−11.878
[7]

4964.182
f
55
9/2
9579.820
789 (1)
—
[19]

5177.821
f
50
13/2
10410.745
655.9 (3)
−29 (7)
[8]

5434.435
nl, f
12
11/2
11322.443
1272 (1)
75 (50)
[19]

5708.06
nl, e
1
11/2
12204.286
1010 (2)
—
This work

5713.87
nl, e
1
13/2
12222.091
1133 (4)
—
This work

6118.737

25
9/2
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932 (3)
10 (20)
[19]

9/2
29766.734
699 (2)

3521.355
nl
2
11/2
1376.602
730.393
−11.877
[7]

4952.322
f
15
9/2
9579.820
789 (1)
—
[19]

5692.390
nl
6
11/2
12204.286
1010 (2)
—
This work

5899.57
nl, e
1
9/2
12821.044
1127 (3)
—
[19]

5919.355
nl, e
18
11/2
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1139 (2)
—
[19]

5/2
29806.394
779 (3)

4801.743
f
18
3/2
8986.443
1029 (23)
—
This work

5164.812
f
5
7/2
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541 (2)
—
[19]

5219.846
nl, f
7
7/2
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169 (2)
—
This work

5356.188
f
15
5/2
11141.576
169 (2)
—
[19]

5612.128
nl, f
1
3/2
11992.788
225 (5)
—
This work

5648.942
nl, f
13
5/2
12108.867
1275 (2)
—
[19]

5703.42
nl, e
1
7/2
12277.935
1760 (4)
—
[19]

5920.05
nl, e
1
7/2
12919.316
180 (2)
—
[19]

6310.689
nl, f
1
5/2
13964.645
185 (2)
—
[19]

6328.498
nl, f
1
7/2
14009.225
1100 (1)
—
[19]

9/2
29980.012
672 (2)

4900.548

10
9/2
9579.820
789 (1)
—
[19]

5624.088
nl, f
1
11/2
12204.286
1010 (2)
—
This work

5826.24
nl, e
1
9/2
12821.044
1127 (3)
—
[19]

5859.80
nl, e
1
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12919.316
180 (2)
—
[19]

5/2
30123.235
657 (1)

4729.763

12
3/2
8986.443
1029 (3)
—
This work

4905.908
f
12
5/2
9745.334
626 (1)
5 (3)
[4]

5081.628
f
15
7/2
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541 (2)
—
[19]

5107.293
nl, f
4
3/2
10548.845
34 (5)

[19]

5811.02
nl, e
1
7/2
12919.316
180 (2)
—
[19]

5920.20
nl, e
1
7/2
13236.606
726 (1)
—
[19]

6186.947
nl, f
5
5/2
13964.645
185 (2)
—
[19]

6204.063
nl
5
7/2
14009.225
1100 (1)

[19]

9/2
30232.222
737 (2)

4840.699
f
80
9/2
9579.820
789 (1)
—
[19]

5498.333
nl, f
1
9/2
12049.942
275 (2)
—
[19]

5741.84
nl, e
1
9/2
12821.044
1127 (3)
—
[19]

5760.58
nl, e
1
11/2
12877.682
1139 (2)
—
[19]

5774.44
nl, e
1
7/2
12919.316
180 (2)
—
[19]

5925.44
nl, e
1
11/2
13360.511
151 (3)
—
[19]

9/2
30356.677
788 (2)

4811.703
f
22
9/2
9579.820
789 (1)
—
[19]

5529.822

36
7/2
12277.935
1760 (4)
—
[19]

5733.22
nl, e
1
7/2
12919.316
180 (2)
—
[19]

5882.05
nl, e
1
11/2
13360.511
151 (3)
—
[19]

9/2
30447.257
695 (2)

4790.816
f
18
9/2
9579.820
789 (1)
—
[19]

4999.286
e
5
7/2
10449.997
541 (2)
—
[19]

5703.59
nl, e
1
7/2
12919.316
180 (2)
—
[19]

5808.79
nl, e
1
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13236.606
726 (1)
—
[19]

5857.48
nl, e
1
9/2
13379.788
932 (3)
10 (20)
[19]

6081.770
nl, f
1
7/2
14009.225
1100 (1)
—
[19]

7/2
30461.496
692 (3)

4787.551
f
5
9/2
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789 (1)
—
[19]

5667.216
nl, e
12
9/2
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1127 (3)
—
[19]

5843.786
nl, e
15
9/2
13354.043
1272 (3)
—
[19]

19/2
30466.597
403 (3)

5705.81
nl, e
1
19/2
12945.474
837.1 (3)
−7 (6)
[9]

5789.467
e
27
21/2
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785.8 (5)
−85 (20)
[9]

5817.01
nl, e
1
17/2
13280.404
208 (2)
20 (50)
[19]

6199.288
f
58
17/2
14340.174
245 (1)
−20 (15)
[19]

6381.18
nl, e
4
19/2
14799.842
126 (5)
—
[19]

8541.018

9
19/2
18761.608
870 (1)
—
This work

5/2
30590.721
622 (2)

4988.161
f
18
3/2
10548.845
34 (5)

[19]

5760.72
nl, e
1
7/2
13236.606
726 (1)
—
[19]

5767.20
nl, e
1
5/2
13256.082
1074 (3)
—
[19]

5891.36
nl, e
1
7/2
13621.400
879 (1)
−10 (10)
This work

13/2
30600.763
656 (2)

3420.845
nl
3
11/2
1376.602
730.393
−11.877
[7]

3602.055
nl
4
13/2
2846.741
613.240
−12.850
[7]

5439.581
nl, f
14
13/2
12222.091
1133 (4)
—
This work

5640.794
nl, f
1
11/2
12877.682
1139 (2)
—
[19]

5868.55
nl, e
1
15/2
13565.490
917 (1)
10 (10)
[19]

6314.88
nl, e
1
15/2
14769.529
806 (2)
—
This work

6554.134

9
13/2
15347.431
674 (2)
—
This work

9/2
30625.599
643 (1)
25 (50)
3264.301
nl, f
15
9/2
0.000
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[7]

4750.218
nl, f
2
9/2
9579.820
789 (1)
—
[19]

4950.613
nl, f
5
11/2
10431.716
701.7 (5)
−10 (7)
[9]

5632.903
nl
10
11/2
12877.682
1139 (2)
—
[19]

5646.143
nl
7
7/2
12919.316
180 (2)
—
[19]

5749.176
nl, e
6
7/2
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726 (1)
—
[19]

5788.26
nl, e
1
9/2
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1272 (3)
—
[19]

5790.43
nl, e
1
11/2
13360.511
151 (3)
—
[19]

5796.90
nl, e
1
9/2
13379.788
932 (3)
10 (20)
[19]

6325.752

15
11/2
14821.565
544 (2)

This work

17/2
30826.745
580 (2)

5244.434
nl, f
1
17/2
11764.216
892.5 (7)
−10 (25)
[9]

5590.891
nl, f
1
19/2
12945.474
837.1 (3)
−7 (6)
[9]

5608.63
nl, e
1
15/2
13002.023
317 (2)
30 (50)
[19]

5791.715
e
45
15/2
13565.490
917 (1)
10 (10)
[19]

6063.863
nl, f
1
17/2
14340.174
245 (1)
−20 (15)
[19]

6226.007
nl, f
1
15/2
14769.529
806 (2)
—
This work

6294.331
nl
1
17/2
14943.825
808 (3)
—
[19]

6394.270
nl, e
9
15/2
15192.075
730 (5)

This work

7160.474
nl
4
15/2
16865.034
291 (4)

This work

17/2
30848.885
507 (1)

5238.350
nl, f
1
17/2
11764.216
892.5 (7)
−10 (25)
[9]

5583.974
f
14
19/2
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837.1 (3)
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[9]

5690.43
nl, e
1
17/2
13280.404
208 (2)
20 (50)
[19]

5784.296
e
15
15/2
13565.490
917 (1)
10 (10)
[19]

6055.730
nl
7
17/2
14340.174
245 (1)
−20 (15)
[19]

6217.433

8
15/2
14769.529
806 (2)
—
This work

6385.226
nl, e
12
15/2
15192.075
730 (5)

This work

5/2
30963.451
661 (2)

4873.488
f
30
7/2
10449.997
541 (2)
—
[19]

4897.088
nl
3
3/2
10548.845
34 (5)

[19]

4922.460
nl
3
7/2
10654.070
169 (2)
—
This work

5764.73
nl, e
1
7/2
13621.400
879 (1)
−10 (10)
This work

5881.14
nl, e
1
5/2
13964.645
185 (2)
—
[19]

7/2
31005.715
692 (2)

4665.944
f
5
9/2
9579.820
789 (1)
—
[19]

5080.914
f
12
9/2
11329.696
530 (3)
—
[19]

5273.970
nl, f
1
9/2
12049.942
275 (2)
—
[19]

5750.72
nl, e
1
7/2
13621.400
879 (1)
−10 (10)
This work

5866.55
nl, e
1
5/2
13964.645
185 (2)
—
[19]

11/2
31010.172
705 (2)

5079.762
nl, f
3
9/2
11329.696
530 (3)
—
[19]

5316.005
nl
5
11/2
12204.286
1010 (2)
—
This work

5875.80
nl, e
1
13/2
13995.931
1067 (1)
200 (50)
[19]

5878.00
nl, e
1
11/2
14002.294
566 (1)
−125 v
[19]

5/2
31299.695
800 (3)

4794.892
f
25
7/2
10449.997
541 (2)
—
[19]

5767.06
nl, e
1
5/2
13964.645
185 (2)
—
[19]

5781.93
nl, e
1
7/2
14009.225
1100 (1)
—
[19]

15/2
31402.846
631 (2)

5743.251
nl
3
13/2
13995.931
1067 (1)
200 (50)
[19]

5918.099
e
10
13/2
14510.207
1085 (2)
—
This work

6166.705
nl, e
30
13/2
15191.218
666 (5)

This work

6166.957
f, e
50
13/2
15191.891
730 (5)

This work

6167.03
nl, e
1
15/2
15192.075
730 (5)

This work

11/2
31664.262
601 (2)

4916.362
f
12
9/2
11329.696
530 (3)
—
[19]

5658.274
nl
12
13/2
13995.931
1067 (1)
200 (50)
[19]

5733.00
nl, e
1
11/2
14226.220
869 (3)
—
[19]

5827.91
nl, e
1
13/2
14510.207
1085 (2)
—
This work

5836.135
nl, e
3
9/2
14534.393
100 (2)
—
[19]

5903.148
nl, f
1
11/2
14728.843
811 (2)
—
[19]

5935.647
nl, e
5
11/2
14821.565
544 (2)

This work

6145.287
nl, e
7
9/2
15396.135
719 (8)

This work

9/2
31677.736
433 (2)

4913.107
nl, f
35
9/2
11329.696
530 (3)
—
[19]

5728.571
nl, e
6
11/2
14226.220
869 (3)
—
[19]

5831.55
nl, e
1
9/2
14534.393
100 (2)
—
[19]

5898.450
nl
5
11/2
14728.843
811 (2)
—
[19]

11/2
31771.680
718 (2)

5055.597
f
14
11/2
11997.137
585 (3)
—
[19]

5799.77
nl, e
1
9/2
14534.393
100 (2)
—
[19]

5865.94
nl, e
1
11/2
14728.843
811 (2)
—
[19]

11/2
31900.665
525 (2)

5385.041
nl, f
5
13/2
13335.868
895 (1)
100 (50)
[19]

5748.69
nl, e
1
13/2
14510.207
1085 (2)
—
This work

5821.88
nl, e
1
11/2
14728.843
811 (2)
—
[19]

7/2
32070.559
668 (2)

4820.053
f
20
9/2
11329.696
530 (3)
—
[19]

5700.92
nl, e
1
9/2
14534.393
100 (2)
—
[19]

5881.09
nl, e
1
9/2
15071.618
635 (3)
—
[19]

5995.55
nl, e, f
1
9/2
15396.135
719 (8)

This work

7/2
32166.080
736 (2)

4797.956
f
18
9/2
11329.696
530 (3)
—
[19]

5670.03
nl, e
1
9/2
14534.393
100 (2)
—
[19]

5695.74
nl, e
1
7/2
14613.96
760 (3)
—
[19]

15/2
32336.849
475 (1)

5690.809
nl, e
15
15/2
14769.529
806 (2)
—
This work

5747.837
nl, e
30
17/2
14943.825
808 (3)
—
[19]

5772.48
nl, e
1
13/2
15018.088
108 (3)
—
[19]

5884.389
f
18
13/2
15347.431
674 (2)
—
This work

5902.322
nl, e
6
15/2
15399.063
889 (2)
—
This work

5911.88
nl, e
1
13/2
15426.436
737 (2)
—
This work

11/2
32373.816
660 (2)

3225.165
nl
12
11/2
1376.602
730.393
−11.877
[7]

4906.194
f
12
11/2
11997.137
585 (3)
—
[19]

5695.696
nl
10
11/2
14821.565
544 (2)

This work

5724.69
nl, e
1
9/2
14910.476
611 (2)
—
[19]

5760.19
nl, e
1
13/2
15018.088
108 (3)
—
[19]

5871.61
nl, e
1
13/2
15347.431
674 (2)
—
This work

5979.354
e
12
13/2
15654.235
577 (1)

This work

9/2
32402.860
544 (2)

4553.938
nl, f
1
7/2
10449.997
541 (2)
—
[19]

4744.046
nl, f
25
9/2
11329.696
530 (3)
—
[19]

5656.45
nl, e
1
11/2
14728.843
811 (2)
—
[19]

5715.19
nl, e
1
9/2
14910.476
611 (2)
—
[19]

5768.327
nl, e
17
9/2
15071.618
635 (3)
—
[19]

5878.396
nl, e
12
9/2
15396.135
719 (8)

This work

13/2
32623.126
591 (2)

3357.401
nl
10
13/2
2846.741
613.240
−12.850
[7]

5434.186
nl, f
1
11/2
14226.220
869 (3)
—
[19]

5678.62
nl, e
1
13/2
15018.088
108 (3)
—
[19]

5786.874
nl, e
5
13/2
15347.431
674 (2)
—
This work

5891.506
e
14
13/2
15654.235
577 (1)

This work

15/2
33098.154
480 (2)

3481.252
nl,
2
15/2
4381.072
541.575
−14.558
[7]

5454.430
nl, f
6
15/2
14769.529
806 (2)
—
This work

5506.798
f
17
17/2
14943.825
808 (3)
—
[19]

5529.417
nl, f
1
13/2
15018.088
108 (3)
—
[19]

5582.878
nl, f
1
13/2
15191.218
666 (5)

This work

5632.008
e
10
13/2
15347.431
674 (2)
—
This work

5648.443
nl, e
1
15/2
15399.063
887 (3)
—
This work

5657.192
nl, e
1
13/2
15426.436
737 (2)
—
This work

5917.931
e
10
13/2
16205.041
733 (2)
—
This work

6128.250
nl, f
1
15/2
16784.797
297 (5)
—
This work

6520.162
nl, f
1
13/2
17765.348
490 (3)
—
[19]

C: comment; nl: new line; e: excited; f: observed as fluorescence line. Lines, for which SNR 1 is given, do not show up in our FT spectrum, but could be excited or were observed as fluorescence lines.

Table 5 contains detailed information concerned with the new odd levels and is built similarly to Table 4.

Table 5: Spectral lines explained by the new odd levels.

New upper odd level
Line
Combining known lower even level

Energy/cm⁻¹
A/MHz
B/MHz
Å
C.
SNR

Energy/cm⁻¹
A/MHz
B/MHz
Reference to col. 10, 11

13/2
24781.116
858 (2)
−20 (10)
5020.041
nl
14
11/2
4866.515
867.997
−50.319
[7]

5588.731
f
60
11/2
6892.934
551.934
−24.736
[7]

5828.953
e
70
13/2
7630.132
776.286
−43.592
[7]

5940.199
nl, e
75
13/2
7951.323
644 (1)

[19]

6535.168

15
11/2
9483.518
731 (1)

[19]

6985.811
nl
6
13/2
10470.329
628 (3)
—
[19]

7/2
24899.621
961 (2)

4884.455
f
170
9/2
4432.225
923.2 (4)
−22 (7)
[8]

5240.529

35
9/2
5822.890
855.8 (4)
−17 (7)
[8]

5920.24
nl, e
5
7/2
8013.089
168 (1)
—
This work

6581.885

7
5/2
9710.600
164 (2)
—
[19]

6673.086

20
7/2
9918.190
1057.4 (5)
22 (6)
[8]

7/2
25172.325
708 (2)

5340.248
nl
30
5/2
6451.808
1189 (6)
−5 (5)
[8]

5364.250
f
80
7/2
6535.572
979 (1)
25 (30)
[19]

5826.151
nl, e
5
7/2
8013.089
168 (1)
—
This work

5831.653
nl, e
26
9/2
8029.275
797 (2)
—
[19]

7338.656
nl
6
9/2
11549.602
1064 (2)
—
This work

9/2
25634.179
674 (1)

4715.227
f
30
9/2
4432.225
923.2 (4)
−22 (7)
[8]

4813.833

8
11/2
4866.515
867.997
−50.319
[7]

5673.44
nl, e
1
7/2
8013.089
168 (1)
—
This work

5774.092
nl, e
9
9/2
8320.240
255 (2)
—
[19]

6048.242

18
9/2
9105.021
689.7 (3)
−3 (5)
[8]

6108.743

18
11/2
9268.726
977 (1)
−24 (20)
[19]

6275.949

20
7/2
9704.744
779 (1)
−50 (30)
[19]

11/2
25900.352
858 (2)

4656.763
f
60
9/2
4432.225
923.2 (4)
−22 (7)
[8]

4752.913
nl
6
11/2
4866.515
867.997
−50.319
[7]

5180.774

55
13/2
6603.591
755.456
−48.633
[7]

5569.785
nl
20
13/2
7951.323
644 (1)
−30 (20)
[19]

5686.67
nl, e
1
9/2
8320.240
255 (2)
—
[19]

5793.302
e
60
9/2
8643.824
797 (2)
—
[19]

5856.16
nl, e
1
11/2
8829.063
769 (1)
−30 (20)
This work

6161.500

15
11/2
9675.029
683 (1)
—
[19]

9469.298

15
9/2
15342.804
1103 (5)
—
This work

17/2
25909.173
854 (2)
−45(5)
5697.960
e, f
120
15/2
8363.901
763.306
−48.253
[7]

5831.453
e, f
210
15/2
8765.542
763.557
−45.805
[7]

7589.454

13
17/2
12736.621
904 (1)
20 (20)
This work

8139.425
nl
5
19/2
13626.672
865 (3)
—
[19]

11/2
26159.533
672 (3)

4601.217
nl
4
9/2
4432.225
923.2 (4)
−22 (7)
[8]

4915.860
f
40
9/2
5822.890
855.8 (4)
−17 (7)
[8]

5037.316
nl
46
11/2
6313.224
756 (1)
—
This work

5112.113
nl
29
13/2
6603.591
755.456
−48.633
[7]

5188.885
nl
11
11/2
6892.934
551.934
−24.736
[7]

5514.111

75
9/2
8029.275
797 (2)
—
[19]

5707.577
nl, e
10
9/2
8643.824
797 (2)
—
[19]

5861.933
nl, e
7
9/2
9105.021
689.7 (3)
−3 (5)
[8]

6720.082

8
11/2
11282.865
1049 (2)
—
This work

6848.946
nl
5
13/2
11562.762
819 (2)
—
This work

9697.559
nl
5
13/2
15850.483
926 (3)
—
[19]

15/2
26332.040
506 (2)
−45(5)
5067.409

85
13/2
6603.591
755.456
−48.633
[7]

5345.561
f
62
13/2
7630.132
776.286
−43.592
[7]

5691.075
e
36
15/2
8765.542
763.557
−45.805
[7]

5926.883
e
110
13/2
9464.440
1056 (1)
−15 (10)
[19]

6222.781

9
13/2
10266.501
972 (2)
—
This work

7390.274
nl
6
15/2
12804.468
732 (1)
—
This work

9/2
26337.481
810 (1)

4563.835
f
30
9/2
4432.225
923.2 (4)
−22(7)
[8]

4656.148
f
8
11/2
4866.515
867.997
−50.319
[7]

4873.218
f
20
9/2
5822.890
855.8 (4)
−17(7)
[8]

4992.551

8
11/2
6313.224
756 (1)
—
This work

5141.397
nl
14
11/2
6892.934
551.934
−24.736
[7]

5340.384
nl
8
7/2
7617.440
866.9 (5)
−4 (5)
[8]

5801.393
nl
7
9/2
9105.021
689.7 (3)
−3 (5)
[8]

5931.678

13
11/2
9483.518
731 (1)
−15 (10)
[19]

7736.76
nl, e
1
7/2
13415.739
797 (2)
—
This work

7842.72
nl, e
1
7/2
13590.311
1151 (2)
—
[19]

7852.18
nl, e
1
9/2
13605.665
681 (2)
—
This work

7928.03
nl, e
1
11/2
13727.482
949 (1)
−30 (20)
[19]

7935.73
nl, e
1
7/2
13739.706
1128 (1)
—
[19]

7/2
26371.971
997 (3)

4556.661
nl
6
9/2
4432.225
923.2 (4)
−22 (7)
[8]

5039.832
f
45
7/2
6535.572
979 (1)
25 (30)
[19]

5330.562
f
40
7/2
7617.440
866.9 (5)
−4 (5)
[8]

5445.441
nl, f
1
7/2
8013.089
168 (1)
—
This work

6242.330
nl
12
9/2
10356.737
1406 (1)
—
This work

6549.43
nl, e
1
5/2
11107.696
658 (2)
—
This work

6582.51
nl, e
1
9/2
11184.396
692 (1)
15 (30)
This work

7217.048
nl
10
9/2
12519.705
693 (3)
—
[19]

9/2
26718.738
826 (2)

4574.911
nl
16
11/2
4866.515
867.997
−50.319
[7]

4784.302

25
9/2
5822.890
855.8 (4)
−17 (7)
[8]

4899.268

20
11/2
6313.224
756 (1)
—
This work

4997.468
f
15
11/2
6714.184
474.692
−29.633
[7]

5042.526

60
11/2
6892.934
551.934
−24.736
[7]

5433.716
nl
14
9/2
8320.240
255 (2)
—
[19]

5729.066
nl, e
6
11/2
9268.726
977 (1)
−24 (20)
[19]

5800.466
nl
15
11/2
9483.518
731 (1)
−15 (10)
[19]

5875.89
nl, e
1
7/2
9704.744
779 (1)
−50 (30)
[19]

5950.538
nl
13
7/2
9918.190
1057.4 (5)
22 (6)
[8]

7/2
27096.093
918 (3)

4862.332
nl, e
12
7/2
6535.572
979 (1)
25 (30)
[19]

5132.395
f
55
7/2
7617.440
866.9 (5)
−4 (5)
[8]

5238.807
f
35
7/2
8013.089
168 (1)
—
This work

6470.79
nl, e
1
5/2
11646.312
1317 (10)
—
[19]

6498.944
nl, e
15
9/2
11713.236
818 (2)
—
[19]

6652.28
nl, e
1
9/2
12067.802
873 (6)
—
[19]

15/2
27294.906
790 (5)

5280.870
f
110
15/2
8363.901
763.306
−48.253
[7]

5395.339
nl
12
15/2
8765.542
763.557
−45.805
[7]

5606.822

42
13/2
9464.440
1056 (1)
−15 (10)
[19]

5870.913

140
13/2
10266.501
972 (2)
—
This work

5925.599

44
13/2
10423.654
869 (1)
25 (30)
This work

5942.039
nl
5
13/2
10470.329
628 (3)
—
[19]

6314.57
nl, e
1
13/2
11462.895
804 (1)
—
This work

6322.77
nl, e
1
15/2
11483.427
987 (1)
—
This work

7709.96
nl, e
1
13/2
14328.241
620 (2)
30 (30)
[19]

9052.188

8
13/2
16250.885
892 (1)
—
[19]

9/2
27394.138
792 (3)

4634.502
nl
4
9/2
5822.890
855.8 (4)
−17 (7)
[8]

4742.301
f
55
11/2
6313.224
756 (1)
—
This work

4792.854
f
24
7/2
6535.572
979 (1)
25 (30)
[19]

4834.250
f
12
11/2
6714.184
474.692
−29.633
[7]

5162.555
nl
11
9/2
8029.275
797 (2)
—
[19]

5331.761

40
9/2
8643.824
797 (2)
—
[19]

6068.572

12
9/2
10920.365
632 (2)
—
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1003 (1)
—
This work

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873 (6)
—
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862 (2)

4288.237
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11
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−22 (7)
[8]

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756 (1)
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This work

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—
This work

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−40 (50)
5131.780
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This work

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20 (20)
This work

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—
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—
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[19]

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—
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This work

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—
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—
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6100.423
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This work

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This work

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This work

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—
This work

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0 (10)
[19]

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—
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4181.612
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11
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[8]

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168 (1)
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This work

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15
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658 (2)
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This work

5996.809
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—
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13/2
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672 (2)

4232.307
nl
10
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[7]

4508.438
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12
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756 (1)
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This work

4568.259
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4
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This work

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—
This work

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—
This work

6561.17
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424 (2)
—
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4403.570
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[8]

4873.768
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3
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168 (1)
—
This work

4877.62
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—
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—
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5
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658 (2)
—
This work

5765.09
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15 (30)
This work

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This work

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4934.613
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—
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22
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This work

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[19]

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5486.089
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1406 (1)
—
This work

5661.189
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—
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15
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15 (30)
This work

5911.742
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15
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—
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5927.318

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—
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6047.884

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[19]

6276.511
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6
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—
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6755.704

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—
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4513.233
nl
5
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4805.628

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5266.081

20
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[7]

5407.426
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8
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—
This work

5453.786

22
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25 (30)
This work

5466.620
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This work

5467.709

24
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—
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—
This work

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—
This work

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—
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—
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[8]

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This work

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—
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4783.424

25
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5213.404

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—
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5232.600

22
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—
[4]

5379.327
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6
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—
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5425.204
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18
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This work

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This work

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—
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—
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—
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4339.625
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4465.960
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This work

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54 (3)
—
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—
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4959.956
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5143.164
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10
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nl
5
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This work

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6
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1
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168 (1)
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This work

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—
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1317 (10)
—
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33
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This work

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9
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This work

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This work

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This work

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20 (20)
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19
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This work

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4396.612
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15
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nl, f
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658 (2)
—
This work

5607.458
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—
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—
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1071 (3)
10 (20)
This work

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25 (30)
This work

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775 (3)
5 (20)
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0
This work

11/2
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4705.959
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This work

5718.648
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—
This work

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15
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—
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4
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960 (3)
—
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7/2
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720 (2)

4338.231
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20
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—
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11/2
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900 (5)

4344.622
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5
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−48.633
[7]

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4614.926
nl, f
17
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4694.881
nl, f
1
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255 (2)
—
[19]

4966.186
nl, f
1
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731 (1)
−15 (10)
[19]

5167.167
nl
5
13/2
10266.501
972 (2)
—
This work

5538.225
nl
5
13/2
11562.762
819 (2)
—
This work

5697.63
nl, e
1
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12067.802
873 (6)
—
[19]

5714.00
nl, e
1
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554 (1)
−45 (30)
This work

17/2
29622.951
501 (1)
15 (20)
5029.391

20
15/2
9745.376
540 (2)
—
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5035.700
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8
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−40.819
[7]

5218.772
nl, f
1
15/2
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1042 (2)
−20 (30)
This work

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65
17/2
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546 (3)
—
[19]

5412.236
nl, f
8
19/2
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876.1 (3)
−31(12)
[8]

5511.292
nl, f
1
15/2
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987 (1)
—
This work

5582.361
nl
50
17/2
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970 (1)
−15 (10)
This work

5754.650
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75
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608 (1)
—
This work

5920.309
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30
17/2
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20 (20)
This work

6177.255
nl, f
1
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13439.009
916 (3)
—
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6410.850
nl, f
1
17/2
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357 (2)
—
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6525.580
nl, f
1
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775 (3)
—
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6735.772
nl, f
1
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14780.940
912 (3)
—
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6804.052
nl, f
6
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646 (3)
—
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6
19/2
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185 (2)
—
[19]

9027.313
nl
4
15/2
18548.497
573 (5)
—
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13/2
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4693.694
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8
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763.306
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[7]

4783.907

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[7]

4901.942
nl
2
11/2
9268.726
977 (1)
−24 (20)
[19]

4949.436

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[19]

4954.177
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731 (1)
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[19]

5001.586

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11/2
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—
[19]

5019.251

65
15/2
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540 (2)
—
[4]

5196.203

17
13/2
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869 (1)
25 (30)
This work

5208.841
nl
13
13/2
10470.329
628 (3)
—
[19]

5329.268
nl, f
1
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301 (1)
−20 (10)
This work

5698.02
nl, e
1
13/2
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554 (1)
−45 (30)
This work

5736.137
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14
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1169 (2)
—
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6244.930
nl
7
13/2
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501 (1)
20 (20)
[19]

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865 (1)

4320.337

14
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979 (1)
25 (30)
[19]

5005.949
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8
7/2
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779 (1)
−50 (30)
[19]

5330.417
nl
9
9/2
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632 (2)
—
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5671.88
nl, e
1
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871 (2)
−10 (50)
[19]

5681.28
nl, e
1
5/2
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1566 (1)
—
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13/2
29774.999
615 (2)

4580.896
nl
7
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644 (1)
−30 (20)
[19]

4758.430
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10
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763.557
−45.805
[7]

4973.743
nl, e
4
11/2
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683 (1)
—
[19]

4991.212

15
15/2
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540 (2)
—
[4]

5177.675

15
15/2
10466.689
1042 (2)
−20 (30)
This work

5178.652
nl
15
13/2
10470.329
628 (3)
—
[19]

5661.92
nl, e
1
13/2
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554 (1)
−45 (30)
This work

5681.90
nl, e
1
11/2
12180.131
679 (3)
—
[19]

5704.72
nl, e
1
15/2
12250.519
608 (1)
—
This work

3/2
29804.574
1115 (4)

5347.001
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15
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658 (2)
—
This work

5420.660
nl, f
1
3/2
11361.762
54 (3)
—
[19]

5699.767
nl
9
1/2
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1534 (2)
—
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5916.390
nl, e
1
5/2
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1336 (4)
—
This work

8035.00
nl, e
1
5/2
17362.452
451 (3)

[19]

13/2
29836.950
535 (2)

5388.150
nl, f
10
11/2
11282.865
1049 (2)
—
This work

5617.903
nl
1
13/2
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—
This work

5642.124
nl
10
13/2
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554 (1)
−45 (30)
This work

5679.492
e
10
11/2
12234.616
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—
[19]

5684.625
nl, e
6
15/2
12250.519
608 (1)
—
This work

6446.205
nl
3
13/2
14328.241
620 (2)
30 (30)
[19]

17/2
29899.954
529 (1)

5161.717
f
280
17/2
10531.951
546 (3)
—
[19]

5332.271
nl, f
1
19/2
11151.433
876.1 (3)
−31 (12)
[8]

5428.396
nl, f
9
15/2
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987 (1)
—
This work

5497.328
nl, f
18
17/2
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970 (1)
−15 (10)
This work

5664.331
e
75
15/2
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608 (1)
—
This work

5847.876
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10
15/2
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732 (1)
—
This work

6143.342
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7
19/2
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865 (3)
—
[19]

15/2
29942.851
583 (2)

4632.848
nl
1
15/2
8363.901
763.306
−48.253
[7]

4949.732
f
10
15/2
9745.376
540 (2)
—
[4]

5134.011
f
95
13/2
10470.329
628 (3)
—
[19]

5150.310
f
105
17/2
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546 (3)
—
[19]

5439.158
nl, f
1
13/2
11562.762
819 (2)
—
This work

5484.391
nl, f
1
17/2
11714.352
970 (1)
−15 (10)
This work

5584.666
nl, f
5
13/2
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1049 (2)
—
This work

5608.601
nl, f
15
13/2
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554 (1)
−45 (30)
This work

5650.598
nl, e
10
15/2
12250.519
608 (1)
—
This work

5810.239
nl, e
7
17/2
12736.621
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20 (20)
This work

5833.24
nl, e
1
15/2
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732 (1)
—
This work

6057.517
f
19
15/2
13439.009
916 (3)
—
[19]

6067.944
nl
10
13/2
13467.373
599 (1)
—
[19]

6305.292
nl
21
13/2
14087.545
657 (3)
—
[19]

19/2
29950.715
418 (2)

5482.025
f
85
17/2
11714.352
970 (1)
−15 (10)
This work

5783.441
e
11
21/2
12664.765
825 (2)
—
[19]

5807.582
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12
17/2
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904 (1)
20 (20)
This work

6278.876
e
11
17/2
14028.707
357 (2)
—
[19]

6388.890

8
17/2
14302.875
775 (3)
—
[19]

8640.361
nl
3
17/2
18380.305
903 (3)
—
[19]

11/2
29985.372
775 (2)

4471.969
nl
2
13/2
7630.132
776.286
−43.592
[7]

4537.158
nl
10
13/2
7951.323
644 (1)
−30 (20)
[19]

4876.245
nl
5
11/2
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731 (1)
−15 (10)
[19]

5069.870
f
18
13/2
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972 (2)
—
This work

5222.124
nl, f
1
11/2
10841.407
530 (3)
—
[19]

5239.264
f
25
11/2
10904.034
301 (1)
−20 (10)
This work

5799.086
e
12
9/2
12746.067
982 (1)
10 (10)
This work

7848.97
nl, e
1
13/2
17248.351
775 (3)
—
[19]

15/2
29989.064
528 (2)

4274.956
nl
13
13/2
6603.591
755.456
−48.633
[7]

5120.900

12
15/2
10466.689
1042 (2)
−20 (30)
This work

5121.857

20
13/2
10470.329
628 (3)
—
[19]

5396.267

10
13/2
11462.895
804 (1)
—
This work

5570.287
f
38
13/2
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1049 (2)
—
This work

5635.875

36
15/2
12250.519
608 (1)
—
This work

5794.67
nl, e
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12736.621
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20 (20)
This work

5817.55
nl, e
1
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732 (1)
—
This work

6383.593

20
13/2
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620 (2)
30 (30)
[19]

9/2
30035.792
884 (2)

4214.208
nl
29
11/2
6313.224
756 (1)
—
This work

4254.083
nl
4
7/2
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979 (1)
25 (30)
[19]

4319.77
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1
11/2
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551.934
−24.736
[7]

4459.377
nl, f
1
7/2
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866.9 (5)
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[8]

4813.971
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1
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977 (1)
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[19]

4917.212
nl, f
1
7/2
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779 (1)
−50 (30)
[19]

5331.018
nl, f
1
11/2
11282.865
1049 (2)
—
This work

5456.237
nl, f
5
9/2
11713.236
818 (2)
—
[19]

5707.45
nl, e
1
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12519.705
693 (3)
—
[19]

5739.56
nl, e
1
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12617.700
883 (2)
—
[19]

11/2
30053.346
759 (1)

4211.092
nl
16
11/2
6313.224
756 (1)
—
This work

4523.203
nl
22
13/2
7951.323
644 (1)
−30 (20)
[19]

4855.627
e
6
13/2
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1056 (1)
−15 (10)
[19]

5052.454
nl, f
1
13/2
10266.501
972 (2)
—
This work

5220.665
nl, f
14
11/2
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301 (1)
−20 (10)
This work

5451.014
nl
11
9/2
11713.236
818 (2)
—
[19]

5701.741
e
20
9/2
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693 (3)
—
[19]

5747.20
nl, e
1
11/2
12658.401
995 (5)
—
This work

5949.782
nl, f
1
11/2
13250.662
424 (2)
—
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11/2
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825 (2)

3895.616
nl
20
9/2
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−22 (7)
[8]

4255.709
nl
6
13/2
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755.456
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[7]

5082.164

10
13/2
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869 (1)
25 (30)
This work

5314.286
nl, f
1
11/2
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1049 (2)
—
This work

5394.551
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819 (2)
—
This work

5733.53
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—
This work

5762.500
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9
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10 (10)
This work

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4252.777
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[7]

4272.879
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3
11/2
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[7]

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nl, f
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551.934
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[7]

4511.432
nl, f
1
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644 (1)
−30 (20)
[19]

5077.984
nl
8
13/2
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869 (1)
25 (30)
This work

5090.053
nl
5
13/2
10470.329
628 (3)
—
[19]

5309.716
nl
9
11/2
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1049 (2)
—
This work

5728.21
nl, e
1
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995 (5)
—
This work

5757.13
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1
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982 (1)
10 (10)
This work

13/2
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681 (2)

4273.830
nl, f
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551.934
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[7]

4476.374
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1
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644 (1)
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[19]

4756.985
nl, f
1
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−24 (20)
[19]

4850.767
e
6
11/2
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683 (1)
—
[19]

4867.379
f
12
15/2
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540 (2)
—
[4]

4994.092
nl, f
4
13/2
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972 (2)
—
This work

5317.344
nl, f
15
15/2
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987 (1)
—
This work

5450.940
nl, f
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1003 (1)
—
This work

5480.058
nl, f
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1049 (2)
—
This work

5538.643
nl, f
1
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1169 (2)
—
[19]

5671.81
nl, e
1
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995 (5)
—
This work

5719.21
nl, e
1
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732 (1)
—
This work

5833.38
nl, e
1
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1070 (1)
45 (20)
This work

5/2
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818 (2)

4484.846
nl, f
1
7/2
8013.089
168 (1)
—
This work

4854.534
nl, e
4
5/2
9710.600
164 (2)
—
[19]

5277.699
nl, f
5
3/2
11361.762
54 (3)
—
[19]

5477.134
nl, f
8
3/2
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1071 (3)
10 (20)
This work

5661.86
nl, e
1
5/2
12646.996
892 (2)
—
This work

5746.49
nl, e
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1336 (4)
—
This work

5788.492
nl
7
3/2
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905 (4)
—
This work

5919.58
nl, e
1
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797 (2)
—
This work

17/2
30346.200
518 (1)

4852.82
nl, e
3
15/2
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540 (2)
—
[4]

5208.303

25
19/2
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876.1 (3)
−31 (12)
[8]

5677.152
nl
10
17/2
12736.621
904 (1)
20 (20)
This work

5699.110
e, f
27
15/2
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732 (1)
—
This work

5913.005
nl, e, f
25
15/2
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916 (3)
—
[19]

11/2
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700 (3)

4791.616
nl
7
11/2
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731 (1)
−15 (10)
[19]

4836.005
f
22
11/2
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683 (1)
—
[19]

5029.500
f
20
13/2
10470.329
628 (3)
—
[19]

5293.851
nl
6
13/2
11462.895
804 (1)
—
This work

5679.79
nl, e
1
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12746.067
982 (1)
10 (10)
This work

6430.416
nl, e
3
11/2
14800.680
618 (2)
−30 (20)
[19]

6470.81
nl, e
1
9/2
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722 (2)
—
This work

13/2
30412.010
658 (2)

4250.671
nl, f
1
11/2
6892.934
551.934
−24.736
[7]

4772.488
nl, f
1
13/2
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1056 (1)
−15 (10)
[19]

5012.309
f
10
15/2
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1042 (2)
−20 (30)
This work

5281.546
nl, f
1
15/2
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987 (1)
—
This work

5442.042
nl, f
5
13/2
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1049 (2)
—
This work

5483.374
nl
1
11/2
12180.131
679 (3)
—
[19]

5499.812
nl, f
10
11/2
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1169 (2)
—
[19]

5753.37
nl, f
1
11/2
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796 (3)
—
This work

5790.316
nl, e
1
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1070 (1)
45 (20)
This work

5825.433
nl, e
7
11/2
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424 (2)
—
[19]

5868.635
nl, e
10
11/2
13376.992
868 (2)
—
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nl, f
1
13/2
13467.373
599 (1)
—
[19]

6053.742
nl
5
13/2
13897.874
900 (3)
—
This work

21/2
30543.982
392 (2)

5155.184
nl, f
11
19/2
11151.433
876.1 (3)
−31 (12)
[8]

5591.534
f
90
21/2
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825 (2)
—
[19]

5909.466
e
35
19/2
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865 (3)
—
[19]

6801.441
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15
19/2
15845.280
185 (2)
—
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13/2
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537 (1)

4742.700
f
6
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731 (1)
−15 (10)
[19]

4925.667
nl, f
1
13/2
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972 (2)
—
This work

4964.105
f
6
13/2
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869 (1)
25 (30)
This work

5185.335
f
16
11/2
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1049 (2)
—
This work

5454.607
nl, f
10
11/2
12234.616
1169 (2)
—
[19]

5703.92
nl, e
1
11/2
13035.697
796 (3)
—
This work

5740.23
nl, e
1
13/2
13146.584
1070 (1)
45 (20)
This work

5999.018
nl, f
1
13/2
13897.874
900 (3)
—
This work

13/2
30644.652
628 (2)

3878.157
nl
15
11/2
4866.515
867.997
−50.319
[7]

4158.377
nl
5
13/2
6603.591
755.456
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4
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[19]

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25 (30)
This work

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This work

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—
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5713.331
nl
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This work

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—
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—
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—
This work

5488.378
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—
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5695.81
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[19]

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4319.208
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—
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—
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5342.725
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12
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10 (20)
This work

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[19]

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4919.547
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This work

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—
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[19]

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—
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—
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3987.182
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—
This work

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—

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—
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5273.622
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—
This work

5308.229
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—
This work

5821.23
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[19]

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—
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7/2
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5031.837
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—
This work

5051.337
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This work

5074.370
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This work

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—
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5232.415
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6
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—
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5405.685
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8
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20 (20)
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—
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25 (30)
This work

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This work

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18 v
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—
This work

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3824.580
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[7]

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4867.409
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This work

4868.272
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—
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5141.807
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—
This work

5292.972
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45
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This work

5325.844
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—
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5563.265
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—
This work

5761.69
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5834.90
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4091.104
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[7]

4694.712
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9
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—
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4860.176
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25
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—
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4874.778

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17/2
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—
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5320.654
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18
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608 (1)
—
This work

5689.099
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—
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4364.261
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12
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[8]

5413.742
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8
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—
This work

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916 (3)
—
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5798.136
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30
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—
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[19]

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6
17/2
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—
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3/2
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4422.278
nl, f
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—
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—
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—
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5181.915
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1071 (3)
10 (20)
This work

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—
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0
This work

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564 (5)
90 (50)
[19]

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—
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6
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—
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4591.588
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3
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—
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−20 (10)
This work

4933.601
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4
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692 (1)
15 (30)
This work

5428.768
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7
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—
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6
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—
This work

5744.87
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—
This work

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[19]

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20 (20)
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10
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866.9 (5)
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[8]

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7
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11
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—
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5531.149
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—
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−30 (20)
[19]

5793.565
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13
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—
This work

7/2
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4229.144
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4
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797 (2)
—
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—
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4969.170
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—
This work

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—
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—
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This work

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—
This work

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546 (3)
—
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900 (3)
—
This work

5729.96
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[19]

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—
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15/2
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437 (2)

4911.429
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—
This work

4916.388
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—
This work

4972.862

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This work

5354.323

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This work

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—
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30 (30)
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—
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11/2
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3698.720
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10
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30
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This work

5910.73
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—
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—
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5286.050
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8
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—
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15
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10
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756 (2)
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7586.509

10
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—
This work

11/2
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4535.186
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—
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This work

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This work

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—
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—
This work

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This work

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This work

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—
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—
This work

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—
This work

15/2
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601 (2)

5014.698
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14
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This work

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732 (1)
—
This work

5492.256
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8
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—
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5680.510
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—
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23
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—
This work

8296.640
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5
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40 (50)
This work

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4979.610

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—
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—
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4467.124
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—
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This work

4696.376
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This work

5578.830
nl, f
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—
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5623.828
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10
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5720.040
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13
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—
This work

5735.74
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—
This work

13/2
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3738.704
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7
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—
This work

3982.695
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[19]

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—
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4805.810

6
15/2
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608 (1)
—
This work

5785.33
nl, e
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15772.545
938 (3)
—
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5860.70
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814 (2)
—
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5886.62
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—
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17/2
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450 (2)

4389.829
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546 (3)
—
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5775.171
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10
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814 (2)
—
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5876.880
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16
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825 (1)
—
This work

6114.815
nl, f
7
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808 (3)
—
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6231.395
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—
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6404.22
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—
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6470.68
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1
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947 (2)
—
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9/2
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744 (2)

3468.665
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7
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−50.319
[7]

5691.05
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742 (1)
40 (20)
[19]

5764.22
nl, e
1
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674 (3)
—
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13/2
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737 (1)

3658.060
nl
6
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755.456
−48.633
[7]

5165.634
nl, f
6
15/2
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873 (3)
—
[19]

5260.914
nl, f
66
15/2
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646 (3)
—
[19]

5667.90
nl, e
1
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16294.378
825 (1)
—
This work

5694.73
nl, e
1
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16377.460
560 (2)
—
This work

5709.27
nl, e
1
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16422.190
960 (3)
—
[19]

7/2
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655 (2)

3608.018
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1
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979 (1)
25 (30)
[19]

4286.343
nl, e
1
9/2
10920.365
632 (2)
—
[19]

4713.198
nl, f
1
7/2
13032.634
893 (3)
—
[19]

4734.423
nl, f
1
5/2
13127.722
156 (1)
0 (10)
[19]

5763.922
e
20
9/2
16899.229
216 (2)

This work

6502.982

15
5/2
18870.4
886 (2)

This work

7261.724
nl
4
9/2
20476.674
550 (1)
50 (50)
This work

17/2
35453.400
595 (1)

3888.734
f
6
15/2
9745.376
540 (2)
—
[4]

4011.474
nl, f
1
17/2
10531.951
546 (3)
—
[19]

5052.260
nl, f
8
17/2
15665.796
906 (1)
—
[19]

5629.604
nl, f
1
17/2
17695.093
1059 (3)
—
[19]

5820.62
nl, e
1
15/2
18277.874
581 (3)
—
[19]

5848.02
nl, e
1
15/2
18358.336
477 (3)
—
[19]

C: Comment; nl: new line; e: excited; f: observed as fluorescence line. Lines, for which SNR 1 is given, do not show up in our FT spectrum but could be excited or were observed as fluorescence lines.

References

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Helmut-Schmidt-Universität, Universität der Bundeswehr Hamburg, and Laboratorium für Experimentalphysik, unpublished material taken from several diploma theses (supervisor G. H. Guthöhrlein)