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Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry logoLink to Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
. 1970 Sep-Oct;74A(5):703–713. doi: 10.6028/jres.074A.059

A Theoretical Investigation of the Configurations (3d + 4s)8 4p in Neutral Cobalt (Co I)*

Charles Roth **
PMCID: PMC6696576  PMID: 32523222

Abstract

Experimental levels of the configurations (3d + 4s)8 4p were compared with corresponding calculated values. On fitting 154 levels by means of 19 free parameters an rms error of only 164 cm−1 was obtained.

Keywords: Cobalt, configurations (3d + 4s)8 4p, energy levels, g-factors, interactions between configurations

1. Introduction

Theoretical investigations of odd configurations 3d”4p for trebly and doubly ionized atoms of the iron group have been published by the author [1, 2]1,2. In the calculations of doubly ionized Sc, Ti, and V the configurations 3dn−14s4p were added [3], and for Cu II other odd configurations were also included [4].

The configurations (3d + 4s)34p were considered previously for the arc spectrum of titanium by Rohrlich [5], as well as by Smith and Siddall [6]. The configurations 3d94s4p in Cu I were investigated by Martin and Sugar [7]. Wilson [8] derived from a Hartree-Fock procedure a set of radial parameters for Cu I 3d94s4p, which predicted satisfactorily the positions of seventeen low levels of Cu I. The configurations (3d + 4s)n 4p were investigated for the arc spectra of calcium, scandium, titanium, vanadium, chromium, manganese, and iron by the author [913].

For the configurations (3d + 4s)3 4p of Ti I, Rohrlich obtained an rms error of 1109 cm −1 before the advent of high-speed computers. He found it necessary to reject several terms which, however, fit very nicely in the recent investigations of Ti I, [6], [9]. Smith and Siddall obtained an rms error of 355 cm−1, whereas in the author’s investigation the rms error was further reduced to 261 cm −1. One main reason for this considerable improvement is due to the fact that the author was able to identify experimental levels of the configuration 3d4s24p and thus consider explicitly the interactions of this configuration with the configurations 3d24s4p and 3d34p. Secondly, Smith and Siddall restricted their analysis to the electrostatic approximation, whereas the author included the spin-orbit interactions.

The configurations (d + s)8p comprise 165 terms splitting into 438 levels. In AEL [14], 50 terms splitting into 139 levels are assigned to the configurations 3d84p + 3d74s4p, 8 terms splitting into 19 levels are given without configuration assignments, and in addition, there are 37 undesignated odd levels.

Since only the parameters3 B′,C, C′. and α vary monotonically from Ca I to Fe I, only the initial values of these parameters were obtained by linear extrapolation. Then, neglecting C and α for Sc I we obtain initially:

B=1,000C=3,660C=3,770α=α=85 (1)

The initial values of the other parameters were assumed to be equal to the final values for Fe I [13].

The initial value for the height of the configuration 3d74s4p can be obtained either from 6Fc. g. or 6GC. G. (they differ only by 4F2). Then, from the electrostatic matrix of 6F [15],

6FC. G.=A15B3Gds3F2Gps+12α=24180 (2)

and

A=50800 (3)

The initial value for the height of 3d84p was obtained from the terms 2D of 3d84p. By using the fact that the trace of a matrix equals the sum of its eigenvalues we obtain, [16,14]

3A4B+2C+4F2+10G3+20α=3d8(a3F)4py2DC.G.+3d8(1D)4px2DC.G.+3d8(3P)4px2DC.G.= 126318 (4)

From the previously determined values of the other parameters, we obtain

A = 39790 (5)

Racah and Shadmi [17], found that the parameter D”, the difference between the weighted averages of the terms 3dn-24s2 and 3dn-14s in the second spectra of the iron group, was a linear function of the atomic number with a quadratic correction. By assuming that D”[(d + s) np] in the first spectra obeys a similar relationship as a function of atomic number, a parabola is drawn to pass through the points determined by D”(Sc I), D”(Ti I) [9] and D” (Fe I) [13], and extrapolated for Co I, (Sc I and Fe I have experimental levels belonging to 3dn−24s24p, whereas in Ti I, eigenfunctions of some of the higher levels to which experimental levels are assigned contain considerable contributions of 3d4s24p so that the standard deviation in A” was only 234).

By substituting into eqs (8) and (9) of reference [12] the final values of the parameters for Fe I [13], and adding 10G135G3 to eq (9) (see ref. [12]) since the matrices of d6s2p, i.e., d6p, on tape are those calculated by Ishidzu and Obi [18], who did not use the convention that for the case of an almost complete shell and an electron outside the shell, one subtracts from the energy matrix the interaction of the outer electron with the closed shell (see section 3, [19]), we obtain

D(Fe)=36420 (6)

By using the values of D”(Ti) and D”(Sc) given by eqs (11) and (14) of reference [10], with the above value for D”(Fe) to obtain the parabola through these three points, and extrapolating

D(Co)=42410 (7)

From eqs (8) and (9) of reference [12] and again adding 10G135G3 to eq (9), reference [12], we obtain

A=87980 (8)

2. Discussion and Results

Although the configuration 3d64s24p is very high, it markedly influences the results. In the calculations of 3d84p + 3d74s4p the rms error was 209 cm−1, whereas the inclusion of 3d64s24p reduced the rms error in the uniform treatment4 to 164 cm−1. Furthermore, the terms obtained from (4F) + 1P5 had very high deviations when considering only 3d84p + 3d74s4p. In particular, in 3d84p + 3d74s4p the mean deviation of the term 4F(1P)x4D was — 643, whereas with the three configurations the mean deviation was only — 50. This great improvement can be attributed to the fact that when (3d + 4s) 84p was considered Gpsassumed a much higher value (7038 ± 5 6 cm−1 versus 6571 ± 62 cm−1).

The experimental data for Co I are not sufficient to permit A”, the height of 3d64s24p, to change freely. Thus in the final variation the value of A” was held fixed at 85220 so that with the final values of the parameters, D” should approximately equal its original value of 42410. The final parameters in the uniform treatment are given in table 1.

Table 1.

Parameters for Co I (3d + 4 s)84p (in units of cm−l)

Parameter Initial Value Final Value
A 39790 39264 ± 122
A 50800 50677 ± 69
A″ 87980 85220 (Fixed)
B 740 833 ± 8
B 1000 956 ± 6
B″ 1260 1079 (Arith. Progress.)
C 3660 3744 ± 63
C 3770 3875 ± 18
C″ 3880 4006 (Arith. Progress.)
Gds=G 1540 1607 ± 33
F2 170 218 ± 10
F2 300 303 ± 7
F2 430 388 (Arith. Progress.)
G1 200 196 ± 9
G1 240 199 ± 7
G1 280 202 (Arith. Progress.)
G3=G3=G3 20 14 ± 2
Gps 7120 7038 ± 56
α= α′= α″ 85 71 ± 3
H = H′ 85 72 ± 6
J = J′ 1180 1245 ± 50
K 2460 2331 ± 55
K′ 3352 3223 (Fixed Diff.)
ζd=ζd=ζd 410 517 ± 17
ζp=ζp=ζp 200 236 ± 53
rms error 164.2 cm−1

The comparison of the experimental and calculated values of the levels and g-factors obtained from the final least-squares of the uniform treatment is given in table A of the Appendix. The calculated values, percentage compositions, and g-factors of all the 258 predicted levels of 3d84p + 3d74s4p are given in table A. The 25 lowest levels of 3d64s24p, based on 3d6(5D) are also quoted. However, the latter values as well as those higher levels of 3d84p + 3d74s4p containing significant contributions of 3d64s24p must be considered as only approximate.

Of the unclassified odd levels only the levels 1°, 2°, 3°, 7°, 10°, 11°, 12°, 15°, and 23° were included. Besides the 28 unclassified odd levels, the following 13 levels were also neglected in the least-squares:

  1. The level 3d8 (3P)4p: y2S1/2

  2. The level 3d8 (3P)4p: x2P1/2

  3. The level 3d8(3P)4p: w2P1/2

  4. The four levels of 3d74s(3D)4p: s 4D

  5. The level t2F7/2:

  6. The level s2F5/2:

  7. The four levels of v4F

It is evident from table A that one of the terms y2S and x2S cannot be assigned to a corresponding theoretical term 2S. The theoretical term 2S, calculated at 48010, contains contributions with the same assignments as y2S and x2S, and the experimental values of the two terms are very close. However, x2S was accepted since the correspondence between the calculated and experimental g-factors is better for x2S than for y2S.

The levels of the term 4P(3P)2P are calculated at 48966 and 48453. Thus, when the experimental level x2P3/2 is assigned to 4P(3P)2P3/2, the deviation is only — 119. However, the level x2P1/2, which is given as uncertain in AEL, would yield a deviation of around — 800, which is incompatible with the results for the other levels. Furthermore, the level w2S, which cannot be assigned to a theoretical level 2S, fits with a deviation of only — 128 when assigned to 4P(3P)2P1/2. Although the agreement between the experimental and calculated g-factors is not very good here, it should be noted that the experimental g-factor of 1.50 for w2S is given as uncertain in AEL.

The theoretical term 2P following 4P(3P)2P in height, is the term 2P(3P)2P to which the levels of v2P correspond. Thus, the experimental levels of w2P cannot be assigned to a theoretical term 2P. The level w2P3/2 is assigned to the previously vacant theoretical level 2P(3P)2D3/2 yielding a deviation of only — 60. The experimental g-factor of 1.099 corresponds to the calculated value of 0.991. The only theoretical level to which w2P1/2 could conceivably be assigned is 2P(3P)2S. However, as the resulting deviation would then be greater than 600, and since the agreement between the experimental g-factor of 1.365 and the calculated g-factor of 1.882 is also very poor, the level w2P1/2 was not inserted into the least-squares.

It is immediately evident from table A that the experimental levels of s 4D have no corresponding vacant theoretical levels to which they could be assigned.

The levels of the term A2D(3P)2F are calculated at 52491 and 52784. Thus, it is evident that the experimental levels t2F5/2 and s2F7/2 should be grouped together and assigned to the theoretical term, A2D(3P)2F. The resulting deviations are 305 and 320 with excellent agreement between the experimental and calculated g-factors of both levels. The two remaining levels t2F7/2 and s2F5/2, both of which are given as uncertain in AEL, have no corresponding theoretical levels to which they could be assigned.

The experimental levels v 4F cannot be assigned to a theoretical term 4F. Conceivably, the levels v 4F3/2,5/2,7/2 could be fitted to the theoretical levels 4P(1P)4D3/2,5/2,7/2 and the level v 4F9/2 could be assigned to 2H(3P)2H9/2. Besides the danger of performing changes in term designations for such high levels, it is important to note that in the paper of Russell, King, and Moore [20], these levels are considered as doubtful.

The following table indicates how the nine unclassified odd levels were assigned:

The unclassified levels 4°, 5°, 8°, 13°, 14°, 16°, 17°, 18°, 19°, 20°, 21°, and 22° have no corresponding theoretical levels to which they could be assigned.

For the level 6° the J-value is questioned. For J equal to 9/2 the level 6°7/2? could be assigned to either 2H(3P)4I9/2 or 2H(3P)4G9/2. ‘

The level 9° probably should be assigned to A2D(3P)4F9/2 to complete with 10°, 11°, and 12° the term A2D(3P)4F. However, unlike the levels 10°, 11°, and 12°, the level 9° is given as uncertain in AEL, and there is no experimental g-factor to confirm this assignment. Furthermore, the levels 10°, 11°, and 12° have combinations with levels of 9 even terms, whereas 9° is based on combinations with the levels of only 2 even terms [20]. Although the level 9° was not included in the least-squares calculations, it is inserted in parentheses adjacent to the calculated value of A2D(3P)4F9/2 in table A.

The following changes in assignment were performed:

  1. AEL3d74s(a5P)4pz4P→ (3P)4P

  2. 2G(3P)2F↔ (1D)2F

  3. AEL 3d8(3P)4py4P)→ 2P(3P)4P

  4. AEL 3d74s(3P)4px4P3/2→ (3P)4S3/2

  5. AEL 3d8(3P)4pv4D3/24P(3P)4P3/2

  6. AEL 3d74s(3P)4py4S3/2→ (3P)4D3/2

  7. AEL 3d74s(3P)4pv2D3/2→ (3P)2D3/2

  8. AEL 3d8(3P)4pw2D3/24P(3P)2D3/2

  9. AEL 3d74s(3P)4py2P→ (3P)2p

  10. AEL 3d74s(3P)4px2S→ (3P)2S

  11. AEL v 2F5/2,7/22H(3P)4G5/2,7/2

  12. AEL 3d8(3P)4px4S→ 2P(3P)4S

  13. AEL 3d74s(3P)4pt 4D→ A2D(3P)4D

  14. AEL w2S1/24P(3P)2P1/2

  15. AEL 3d8(3P)4px2P3/24P(3P)2P3/2

  16. AEL 3d74s(3P)4pw2P3/22P(3P)2D3/2

  17. 2H(3P)2G↔ (lG)2G

  18. AEL 3d74s(3H)4px2H9/2,11/22H(3P)4H9/2,11/2

Although in most changes of assignment the theoretical eigenfunctions are mixed strongly, in the changes 1, 2, 3, 9, 10, 12, 13, and 15 the compositions of the theoretical levels contain only small contributions of the experimental assignments (see table A).

The experimental g-factor of y4S is 1.273. Since the theoretical g-factor of 4S is 2.000, y 4S could be assigned to a theoretical term 4S if the latter would have significant contributions of terms with low theoretical g-factors (such as 4F3/2, 2D3/2). However, this is not so in the present case and thus after several variations it was ascertained that the best agreement in the values and g-factors of the levels 4P(3P)4P, (3P)4D and (3P)4S is obtained after performing the changes 4, 5, and 6.

The grouping of the levels of w2D and v2D as given in AEL, is incongruous with the calculated values of the levels of (3P)w2D and 4P (3P)v2D. Thus, the changes 7 and 8 were performed.

The levels of v 2F cannot be assigned to a theoretical term 2F. However, when the two levels of v 2F are assigned to the two lowest levels of 2H (3P)4G, not only is there excellent agreement between the experimental and calculated values of the levels (for each level the deviation is only — 24), but there is also a close correspondence between the experimental and calculated g-factors (the experimental g-factors of 0.619 and 1.173 correspond to the calculated values of 0.619 and 1.008, respectively). This change is indicated by 11.

The changes 14 and 16 were discussed previously.

The change 18 is similar to change 11. Although there is no corresponding theoretical term 2H to which the levels of x 2H could be assigned, there is excellent agreement between the calculated and experimental values of the levels and g-factors when the levels x 2H are assigned to the theoretical levels 2H(3P)4H9/2,11/2. To the theoretical level 2H(3P)4H7/2, the level 157/20 (based on 10 combinations with even levels, [20]), is assigned to yield a deviation of only — 48.

Below the limit of the experimental levels inserted, there are 21 theoretical levels with no corresponding experimental levels. The lowest of these is the level 4P(3P)6S calculated at 34642.

With very few exceptions the agreement between the experimental and calculated g-factors is excellent.

Table 2.

Unclassified Odd Levels of Co I

Level Assignment Deviation Observed g-Factor Calculated g-Factor
17/2° 4P(3P)6P7/2 205 1.40 1.709
25/2° 4P(3P)6P5/2 165 1.863 1.866
37/2° 2G(3P)4H7/2 −1 0.680
75/2° 2P(3P)2P5/2 −218 1.163
107/2° A2D (3P)4F7/2 58 1.260 1.257
115/2° A2D (3P)4F5/2 −7 1.079 1.107
123/2° A2D (3P)4F3/2 87 0.569 0.680
157/2° 2H (3P)4H7/2 −48 0.690
233/2° A2D (3P)4P3/2 180 1.353 1.363

Appendix Table A. Observed and Calculated Levels and g-Factors

In the column “Name” the calculated designation of the term is given. Whenever the terms of the parent dn have different seniorities these are denoted by the letters A and B, the lower calculated term being designated by A. The terms of d7sp are denoted by d7v1S1L1(sp1,3P)SL. The terms of d8p are differentiated from those of d6s2p by using a star for the latter terms.

The entries in the columns “j”, “Obs. Level (cm−1)”, “ Calc. Level (cm−1)”, “ Obs. g-Factor” and “ Calc. g-Factor” are self-evident. In the column “Percentage”, for each calculated level either the three highest contributions or all those contributions exceeding five percent are given.

Whenever the experimental and calculated term designations differ, the experimental designation is entered in the column “AEL” using the notation of C. E. Moore, [14]. In many instances the exchanges involve complete terms rather than isolated levels. Unless specified otherwise, the entries in the column “AEL” pertain to exchanges in terms.

The column “O-C” gives the difference between the observed and calculated values of the levels.

The entries are in increasing energy of the calculated levels.

Table A.

Observed and calculated levels of Co I (3d + 4s)84p

Name J Percentage AEL Obs.
Level
(cm−1)
Calc. Level
(cm−1)
o-c Obs. g-Factor Calc. g-Factor
Config. Desig.
4F(3P)6F 1/2 99 3d74s(a5F)4p z 6F 25233 25240 −7 −0.622 −0.631
3/2 95 25041 25061 −20 1.118 1.080
5/2 90 + 74F(3P)6D 24733 24775 −42 1.336 1.328
7/2 84 + 124F(3P)6D 24326 24397 −71 1.436 1.412
9/2 78 + 184F(3P)6D 23856 23961 −105 1.481 1.452
11/2 97 23612 23635 −23 1.466 1.451
4F(3P)6D 1/2 94 3d74s(a5F)4p z 6D 26250 26404 −154 3.286 3.297
3/2 91 26063 26210 −147 1.812 1.810
5/2 87 + 64F(3P)6F 25740 25881 −141 1.612 1.615
7/2 83 + ll4F(3P)6F 25269 25407 −138 1.550 1.555
9/2 78 + 174F(3P)6F 24628 24770 −142 1.569 1.529
4F(3P)6G 3/2 97 3d74s(a5F)4p z 6G 26598 26425 173 0.006 0.042
5/2 95 26450 26273 177 0.876 0.882
7/2 94 26232 26049 183 1.150 1.156
9/2 94 25938 25749 189 1.281 1.278
11/2 96 25569 25375 194 1.354 1.344
13/2 100 25139 24941 198 1.40 1.384
4F(3P)6F 3/2 85 + 13(3F)4F 3d74s(a5F)4p z 4F 29563 29561 2 0.410 0.408
5/2 82 + 13(3F)4F 29216 29217 −1 1.033 1.026
7/2 80 + 13(3F)4F 28777 28779 −2 1.247 1.234
9/2 82 + 15(3F)4F 28346 28328 18 1.330 1.331
4F(3P)4G 5/2 94 3d74s(a5F)4p z 6G 30103 30044 59 0.577 0.583
7/2 91 29735 29680 55 0.995 0.991
9/2 90 29270 29219 51 1.175 1.175
11/2 95 28845 28765 80 1.276 1.273
4F(3P)4D 1/2 65 + 31(3F)4D 3d74s(a5F)4p z 4D 30743 30790 −47 −0.006 0.003
3/2 62 + 33(3F)4D 30444 30482 −38 1.192 1.192
5/2 57 + 36(3F)4D 29949 29969 −20 1.359 1.362
7/2 53 + 42(3F)4D 29295 29289 6 1.425 1.425
4F(3P)2G 7/2 41 + 29(3F)4F + 11(3F)2G 3d74s(63F)4p z 2G 32733 32850 −117 0.899 0.990
9/2 47 + 29(3F)4G + 13(3F)4F 31700 31822 −122 1.126 1.121
4F(3P)2F 5/2 71 + 26(3F)2F 3d74s(63F)4p z 2F 32782 32962 −180 0.870 0.863
7/2 66 + 28(3F)2F 31871 32061 −190 1.177 1.153
(3F)4D 1/2 59 + 364F(1P)4D 33449 33533 −84 0.012 0.003
3/2 56 + 374F(‘P)4D 33151 33209 −58 1.195 1.193
5/2 51 + 414F(1P)4D 32654 32680 −26 1.366 1.364
7/2 46 + 454F(1P)4D 32028 31982 44 1.395 1.416
(3F)4G 5/2 52 + 30(3F)4F 33674 33608 66 0.704 0.777
7/2 34 + 31(3F)2G + 11(3F)4F 33173 33185 −12 1.039 1.040
9/2 53 + 28(3F)2G + 84F(3P)2G 32465 32414 51 1.154 1.171
11/2 94 32431 32296 135 1.287 1.273
4F(3P)2D 3/2 53 + 37(3F)2D 3d74s(b3F)4p z 2D 34352 34423 −71 0.787 0.781
5/2 53 + 42(3F)2D 33463 33497 −34 1.186 1.198
(3F)4F 3/2 67 + 244F(1P)4F 34196 34205 −9 0.430 0.430
5/2 38 + 42(3F)4G 33946 33937 9 0.900 0.824
7/2 25 + 33(3F)4G + 244F(3P)2G 33467 33445 22 1.155 1.055
9/2 51 + 224F(3P)4F + 144F(3P)2G 32842 32791 51 1.313 1.278
(3F)2G 7/2 50 + 21(3F)4G + 214F(3P)2G 34134 34179 −45 0.917 0.921
9/2 56 + 274F(3P)2G + 11(3F)4G 33440 33420 20 1.165 1.159
4P(3P)6S 5/2 99 34642 1.998
(3F)2F 5/2 53 + 18(3F)2D +164F(3P)2F 36330 36250 80 0.892 0.948
7/2 61 + 254F(3P)2F 35451 35236 215 1.145 1.144
(3F)2D 3/2 53 + 404F(3P)2D 36875 36923 −48 0.794 0.805
5/2 35 + 364F(3P)2D 36092 36049 43 1.186 1.118
4P(3P)6D 1/2 94 39184 3.314
3/2 92 39093 1.846
5/2 92 38991 1.655
7/2 92 38902 1.583
9/2 96 38847 1.555
4P(3P)4S 3/2 74 +10(3P)4S 3d74s(a 5P)4p z 4S 40622 40240 382 2.017 1.918
4F(1P)4D 1/2 62 + 24(3P)4D 3d74s(b 3F)4p x 4D 41102 41141 −39 0.026 0.012
3/2 62 + 23(3P)4D 40828 40863 −35 1.240 1.204
5/2 63 + 21(3P)4D 40346 40395 −49 1.370 1.369
7/2 65 + 18(3P)4D 39649 39726 −77 1.428 1.428
4P(3P)6P 3/2 90 + 64P(3P)4S 40992 2.291
5/2 93 41105 40940 165 1.863 1.866
7/2 97 41041 40836 205 1.40 1.709
4F(!P)4F 3/2 61 + 272G(3P)4F 3d74s(b 3F)4p x 4F 42797 42396 401 0.406 0.408
5/2 59 + 242G(3P)4F 42434 42046 388 1.024 1.052
7/2 63 + 232G(3P)4F 41918 41571 347 1.248 1.234
9/2 66 + 192G(3P)4F 41226 40917 309 1.319 1.330
(3P)4P 1/2 66 + 142P(3P)4P+ 114P(3P)4P 3d74s(a 5P)4p Z 4P 41970 42048 −78 2.51 2.520
3/2 64 + 124P(3P)4P + 92P(3P)4P 41983 41972 11 1.732 1.665
5/2 65 + 124P(3P)4P + 92P(3P)4P 41969 41932 37 1.627 1.548
4F(1P)4G 5/2 93 3d74s(b 3F)4p x 4G 43200 43350 −150 0.649 0.581
7/2 92 42811 42962 −151 1.004 0.988
9/2 93 42269 42439 −170 1.169 1.174
11/2 95 41529 41747 −218 1.291 1.272
2G(3P)4H 7/2 95 42988 42989 −1 0.680
9/2 90 42775 0.977
11/2 92 42632 1.135
13/2 98 42565 1.229
(1D)2P 1/2 42 + 25(3P)2P + 72P(3P)2P 43130 43084 46 0.727 0.846
3/2 31 + 23(1D)2D + 224P(3P)4D 43538 43544 −6 1.120 1.175
4P(3P)4D 1/2 75 + 92P(3P)4D 3d74s(a 5P)4p w 4D 43436 43444 −8 0.169 0.101
3/2 58 + 9(1D)2D 43264 43298 −34 1.191 1.186
5/2 46 + 28(1D)2F 43243 43218 25 1.101 1.168
7/2 88 + 3(1D)2F 43399 43346 53 1.334 1.417
(lD)2F 5/2 37 + 364P(3P)4D+102G(3P)2F 3d74s(3G)4p x 2F 43426 43371 55 1.119 1.108
7/2 45 + 202G(3P)4F + 162G(3P)2F 43555 43602 −47 1.229 1.174
(1D)2D 3/2 40 + 33(1D)2P + 5(3P)2P 43911 43957 −46 1.127 1.070
5/2 52 + 202G(3P)4F 43922 44113 −191 1.230 1.147
4P(3P)2S 1/2 61 + 21(3P)2S 3d74s(3P)4p z 2S 44455 44185 270 2.10 1.908
2P(3P)4F 3/2 68+184F(1P)4F + 7(3F)4F 3d74s(3G)4p w 4F 44556 44745 −189 0.415 0.412
5/2 29 + 232G(3P)4G + 23(1D)2D 44202 44333 −131 0.950 0.970
7/2 39 + 23(1D)2F + 112G(3P)4G 43848 43979 −131 1.197 1.183
9/2 71 + 154F(1P)4F + 5(3F)4F 43295 43523 −228 1.295 1.318
2G(3P)4G 5/2 69 + 192G(3P)4F 3d74s(3G)4p w 4G 44568 44561 7 0.676 0.703
7/2 77 + ll2G(3P)4F 44394 44343 51 1.004 1.013
9/2 85 + 52G(3P)4F 44183 44100 83 1.163 1.169
11/2 93 43952: 43851 101 1.279 1.266
2P(3P)4P 1/2 44 + 404P(1P)4P 3d8(3P)4p x 2P 44858 45215 −357 2.371 2.523
3/2 37 + 404P(1P)4P 44658 44948 −290 1.674 1.680
5/2 33 + 424P(1P)4P 44480 44708 −228 1.557 1.565
2G(3P)2H 9/2 87 3d74s(3G)4p x 2H 45111 44988 123 0.897 0.907
11/2 90 45540 45380 160 1.097 1.091
(3P)2D 3/2 72 + 7(1D)2D + 64P(3P)2D 3d74s(3P)4p v 2D 46186 46017 169 1.218 0.853
5/2 70 + 84P(3P)2D 3d8(3P)4p w 2D 45688 45397 291 1.219 1.170
(3P)4S 3/2 32 + 254P(3P)4S + 13(3P)2P 3d74s(3P)4p x 4P 45905 45906 − 1 1.674 1.794
4P(3P)4P 1/2 44 + 22(3P)4P + 152P(3P)4P 3d74s(3P)4p x 4P 45957 45864 93 2.522 2.613
3/2 30 + 18(3P)4P + 162P(3P)4P 3d8(3P)4p v 4P 46260 46151 109 1.508 1.714
5/2 30 + 242P(3P)4P + 16(3P)4P 3d74s(3P)4p x 4P 46003 46168 −165 1.543 1.566
2G(3P)2G 7/2 79 + 102H(3P)2G 3d74s(3G)4p x 2G 45767 45931 −164 0.898 0.896
9/2 80 + 102H(3P)2G 46032 46211 −179 1.131 1.113
(3P)4D 1/2 27 + 21A2D(3P)4D + 172P(3P)4D 46502 46489 13 0.161 0.149
3/2 14 + 16(3P)2P + 12(1D)2P 3d74s(3P)4p y 4S 46563 46654 −91 1.273 1.200
5/2 28 + 252P(3P)4D + 114F(1P)4D 46330 46485 − 155 1.365 1.361
7/2 44 + 222P(3P)4D + 114F(1P)4D 45971 46229 −258 1.424 1.406
4P(3P)2D 3/2 61 + 142P(3P)2D + 7(3P)4D 3d8(1P)4p w 2F 46455 46803 −348 0.869 0.893
5/2 45 + 202G(3P)2F + 9(3P)4D 3d74s (3P)4p v 2D 46672 46695 −23 1.233 1.130
2G(3P)2F 5/2 33 + 224P(3P)2D + 14(1D)2F 3d8(1D)4p w 2F 47129 46944 185 0.858 0.971
7/2 36 + 312P(3P)4D + 11(1D)2F 47225 47062 163 1.229 1.310
(3P)2P 1/2 46 + 30(1D)2P + 104P(3P)2P 3d74s (3P)4p y 2P 47091 47215 −124 0.656 0.671
3/2 27 + 12(1D)2P + 9(3P)4D 46685 46471 214 1.352 1.394
2P(3P)4D 1/2 37 + 21(3P)2S + 20(3P)4D u 4D 47905 48010 −105 0.016 0.691
3/2 47 + 18(3P)4D + 10A2D(3P)4F 47612 47554 58 1.122 1.105
5/2 45 + 134P(3P)2D + 11(3P)4D 47394 47365 29 1.324 1.319
7/2 26 + 23A2D(3P)4D + 212G(3P)2F 46873 46806 67 1.352 1.394
2H(3P)4I 9/2 94 48081 0.739
11/2 94 47874 0.968
13/2 97 47717 1.108
15/2 100 47613 1.200
(3P)2S 1/2 35 + 262P(3P)4D + 154P(3P)2S 3d74s (3P)4p x 4S 48026 48010 16 1.699 1.193
2H(3P)4G 5/2 81 + 72G(3P)2F v 2F 48616: 48640 −24 0.619 0.619
7/2 84 + 42G(3P)2F v 2F 48317 48341 −24 1.173 1.008
9/2 92 47996 1.171
11/2 95 47626 1.272
A2D(3P)4D 1/2 52 + 16(3P)4D 3d74s(3P)4p x 2D 48572 48893 −321 0.452 0.198
3/2 21 + 222P(3P)4S + 12(3P)4D 48546 48742 −196 1.050 1.254
5/2 52 + 19(3P)4D 48444 48796 −352 1.340 1.339
7/2 51 + 18(3P)4D 48217 48573 −356 1.211 1.386
4P(3P)2P 1/2 69 + 122P(3P)2S + 10(3P)2P w 2S 48838 48966 −128 1.50: 0.840
3/2 40 + 152P(3P)4S + 11A2D(3P)4D 3d8(3P)4p x 2P 48334 48453 −119 1.436 1.369
2P(3P)4S 3/2 48 + 26A2D(3P)4D + 8(3P)4D 3d8(3P)4p x 2S 48754 48946 −192 1.728 1.623
2P(3P)2D 3/2 29 + 344P(3P)2P + 24A2D(3P)4F 3d74s(3P)4p w 2P 49025 49085 −60 1.099 0.991
5/2 32 + 34A2D(3P)4F + 102P(3P)4D 48829 49047 −218 1.163
A2D(3P)4F 3/2 50 + 152P(3P)2D + 11A2D(3P)2D 12° 50105 50018 87 0.569 0.680
5/2 43 + 242P(3P)2D 11° 49847 49854 −7 1.079 1.107
7/2 75 + 62P(3P)4D 10° 49484 49426 58 1.260 1.257
9/2 98 (49198:) 49108 (90) 1.333
2H(3P)2I 11/2 90 50080 0.936
13/2 67 + 312H(3P)4H 50435 1.126
(1G)2H 9/2 81 + 92H(3P)2H 50211 50124 87 0.899 0.915
11/2 69 + 172H(3P)2H 50376 50389 −13 1.091 1.085
2P(3P)2S 1/2 68 + 134P(3P)2P 50417 1.882
(1G)2G 7/2 38 + 372H(3P)2G 3d74s(3H)4p w 2D 50611 50556 55 0.82 0.908
9/2 40 + 382H(3P)2G 50593 50616 −23 1.10 1.095
(1G)2F 5/2 57 + 17A2D(3P)2F 50712 50771 −59 0.905 0.909
7/2 60 + 12A2D(3P)2F + 82G(3P)2F 50579 50693 −114 1.125 1.120
2P(3P)2P 1/2 71 + 13A2D(3P)4D v 2P 50945 50972 −27 0.732 0.707
3/2 53 +15A2D(3P)4D 50925 50861 64 1.340 1.331
2H(3P)4H 7/2 89 + 5(1G)2G 15° 51185 51233 −48 0.690
9/2 86 + 5(1G)2G 3d74s(3H)4p x 2H 50903 51048 −145 0.941 0.982
11/2 86 + 11(1G)2H 3d74s(3H)4p x 2H 50703 50828 −125 1.110 1.128
13/2 68 + 302H(3P)2I 50573 1.184
A2D(3P)4P 1/2 66 + 122P(3P)4P 3d74s(3D)4p w 2P 52355 52180 175 2.304 2.414
3/2 57 + 172P(3P)2P 52014 51784 230 1.616 1.617
5/2 73 + 132P(3P)2P 51160 50950 210 1.578 1.564
A2D(3P)2F 5/2 58 + 17(1G)2F t 2H 52796 52491 305 0.883 0.897
7/2 75 + 112G(3P)2F s 2F 53104 52784 320 1.136 1.149
A2D(3P)2D 3/2 51 + 212P(3P)2D u 2D 53075 52884 191 0.823 0.816
5/2 49 +182P(3P)2D 53196 53964 232 1.206 1.180
2H(3P)2G 7/2 44 + 30(1G)2G + 222G(3P)2G 3d8(1G)4p v 2G 53374 53288 86 0.888 0.889
9/2 44 + 28(1G)2G + 242G(3P)2G 53276 53214 62 1.124 1.111
A2D(3P)2P 1/2 93 53764 0.750
3/2 87 23° 54165 53985 180 1.353 1.363
2H(3P)2H 9/2 91 + 6(1G)2H 54608 0.910
11/2 88 + 6(1G)2H 54821 1.092
4P(1P)4D 1/2 82 + 10(5D)4D* 55223 0.094
3/2 80+10(5D)4D* 55057 1.224
5/2 81 + 11(5D)4D* 54867 1.377
7/2 85 +12(5D)4D* 54693 1.427
4P(1P)4S 3/2 58 + 27(3P)4S 55395 1.961
4P(1P)4P 1/2 70 + 19(5D)4P* 55825 2.561
3/2 61 + 17(5D)4P* 55792 1.729
5/2 70 + 21(5D)4P* 55421 1.587
2G(1P)2H 9/2 93 57733 0.914
11/2 91 57103 1.088
(5D)6D* 1/2 99 58371 3.328
3/2 99 58244 1.864
5/2 98 58035 1.655
7/2 97 57754 1.585
9/2 99 57426 1.554
2G(1P)2F 5/2 84 + 4(1D)2F 58878 0.859
7/2 80 + 4(‘D)2F 58189 1.138
2G(1P)2G 7/2 74 + 11(1G)2G 59402 0.892
9/2 68 +132H(JP)2G 58698 1.105
2P(1P)2P 1/2 65 + 17A2D(1P)2P 60923 0.776
3/2 65 + 13A2D(1P)2D 60947 1.231
(5D)6F* 1/2 99 61723 −0.659
3/2 98 61647 1.066
5/2 98 61517 1.312
7/2 97 61332 1.394
9/2 96 61091 1.432
11/2 100 60812 1.455
2P(1P)2P 3/2 83 + 62P(1P)2P 61733 0.854
5/2 79 + 8A2D(1P)2F 61014 1.175
2F(3P)4G 5/2 94 61635 0.579
7/2 93 61764 0.990
9/2 94 61941 1.175
11/2 95 62174 1.270
2F(3P)4F 3/2 94 62192 0.416
5/2 91 62335 1.035
7/2 95 62483 1.232
9/2 60 + 272H(1P)2G 62848 1.250
2H(1P)2I 11/2 96 62729 0.929
13/2 98 62101 1.077
2F(3P)4D 1/2 93 62496 0.002
3/2 92 62487 1.189
5/2 89 62485 1.359
7/2 87 62484 1.436
2P(1P)2S 1/2 70 +142P(3P)2P 62732 1.816
a2d(1p)2d 3/2 69 +102P(1P)2P 63531 0.862
5/2 78 + 82F(3P)2D 62568 1.186
2H(1P)2G 7/2 60 + 11(5D)4F* 63467 0.949
9/2 36 + 312F(3P)4F +17(5D)4F* 62864 1.221
(5D)6P* 3/2 97 63870 2.363
5/2 98 63447 1.878
7/2 93 62815 1.697
A2D(1P)2F 5/2 66 +162F(3P)2D 64160 0.970
7/2 89 63306 1.141
(5D)4F* 3/2 93 63975 0.427
5/2 89 63699 1.054
7/2 77 + 82H(1P)2G 63330 1.209
9/2 77 + 102H(1P)2G 62810 1.305
2F(3P)2D 3/2 68 + 12(5D)4D* 64398 0.857
5/2 49 + 14(5D)4D* 64410 1.175
(5D)4D* 1/2 73 + 94P(1P)4D 64715 0.055
3/2 61 + 132F(3P)2D 64573 1.131
5/2 53 + 242F(3P)2D 64226 1.312
7/2 68 + 7(5D)4F* 63916 1.415
2H(1P)2H 9/2 78 + 132F(1P)2G 64952 0.937
11/2 90 64391 1.091
2F(3P)2G 7/2 85 +102H(1P)2G 64832 0.890
9/2 78 + 142H(1P)2H 64886 1.088
A2D(1P)2P 1/2 66 + 122P(3P)2P 65449 0.694
3/2 78 64135 1.347
2F(3P)2F 5/2 96 66808 0.859
7/2 96 66717 1.143
(5D)4P* 1/2 78 + 204P(1P)4P 68813 2.662
3/2 78 + 204P(1P)4P 68540 1.732
5/2 77 + 214P(1P)4P 68061 1.599
7/2 87 + 9(3H)2G* 75095 0.890
9/2 87 + 9(3H)2G* 75389 1.111
2F(1P)2G 3/2 88 75783 0.801
2F(1P)2D 5/2 73 + 152F(3P)2F 75894 1.143
2F(1P)2F 5/2 75 + 152F(1P)2D 76244 0.915
7/2 90 + 6(3G)2F* 76512 1.142
(1S)2P 1/2 89 + 9A2D(1P)2D 76561 0.667
3/2 88 +10A2D(1P)2D 76836 1.333
B2D(3P)4P 1/2 97 79901 2.664
3/2 95 79919 1.733
5/2 96 79977 1.599
B2D(3P)4F 3/2 95 80762 0.401
5/2 95 80885 1.028
7/2 94 81057 1.237
9/2 93 81278 1.332
B2D(3P)2P 1/2 65 + 17B2D(3P)4D + 9(A3P)4D* 84473 0.477
3/2 79 + 12B2D(3P)4D 84186 1.298
B2D(3P)2F 5/2 75 + 13B2D(3P)4D 84381 0.945
7/2 75 + 19B2D(3P)4D 84408 1.199
B2D(3P)4D 1/2 71 + 23B2D(3P)2P 84201 0.171
3/2 73 + 10B2D(3P)2P 84393 1.183
5/2 78 + 12B2D(3P)2F 84538 1.297
7/2 45 + 18B2D(3P)2F 85100 1.387
B2D(3P)2D 3/2 96 86758 0.803
5/2 96 86672 1.200
B2D(1P) 2P 1/2 56 + 32(3D)2P* 93582 0.669
3/2 55 + 35(3D)2P* 93960 1.332
B2D(1P)2F 5/2 41 + 23(3G)2F* + 20(3D)2F* 96929 0.868
7/2 42 + 22(3D)2F* + 20(3G)2F* 96971 1.142
B2D(1P)2D 3/2 49 + 41(3D)2D* 98049 0.805
5/2 51 + 36(3D)2D* 98457 1.199

Footnotes

*

An invited paper. The work described in this paper was supported in part by the National Bureau of Standards and the National Research Council of Canada.

1

Figures in brackets indicate literature references at the end of this paper.

2

The reader is referred to these papers for an explanation of the method used, notation, and significance of the various parameters. The numerical values of all levels and parameters are in cm−1.

3

Unprimed parameters refer to the configuration 3d84p, primed parameters to 3d74s4p and doubly primed to 3d64s2p.

4

The parameters A, A′, Gds and Gps are allowed to change freely. The parameters B, C, F2, and G1 are in arithmetic progression. The parameters G3, α, ζd, and ζp are kept equal, and for the parameters of the interactions between configurations H′ is kept equal to H, J′ to J, G to Gds and K′ = K + 892 (fixed difference).

5

See the appendix of this paper for the theoretical term designations.

References


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