29
00 1022 3s NSRDS-NBS 34 oG.I M' \a c\1 Ionization Potentials and Ionization Limits Derived From the Analyses of Optical Spectra U.S. DEPARTMENT OF COMMERCE National
00 1022 3s
NSRDS-NBS 34oG.I M'
\a c\1
Ionization Potentialsand Ionization Limits
Derived From the Analysesof Optical Spectra
U.S.DEPARTMENT
OFCOMMERCE
National
UNITED STATES DEPARTMENT OF COMMERCE " MAURICE H. STANS, Secretary
NATIONAL BUREAU OF STANDARDS " LEWIS M. BRANSCOMB, Director
Ionization Potentials and
Ionization Limits Derived from
the Analyses of Optical Spectra
Charlotte E. Moore
Office of Standard Reference DataNational Bureau of Standards
Washington, D.C. 20234
oatL ST 4 ,
NSRDS
NSRDS-NBS 34
Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.), 34, 22 pages (Sept. 1970)
CODEN: NSRDA
1970 by the Secretary of Commerce on Behalf of the United States Government
Issued September 1970
For sale by the Superintendent of Documents, U.S. Government Printing OfficeWashington, D.C., 20402 (Order by SD Catalog No. C 13.4.:34).- Price 75 cents
N !i
Y / '1
/1I ~2i;*
Library of Congress Catalog Card Number: 76-607107
FOREWORD
The National Standard Reference Data System provides effective access to the quantitative
data of physical science, critically evaluated and compiled for convenience, and readily accessiblethrough a variety of distribution channels. The System was established in 1963 by action of thePresident's Office of Science and Technology and the Federal Council for Science and Technology,
with responsibility to administer it assigned to the National Bureau of Standards.
The System now comprises a complex of data centers and other activities, carried on inacademic institutions and other laboratories both in and out of government. The independentoperational status of existing critical data projects is maintained and encouraged. Data centersthat are components of the NSRDS produce compilations of critically evaluated data, criticalreviews of the state of quantitative knowledge in specialized areas, and computations of useful
functions derived from standard reference data. In addition, the centers and projects establishcriteria for evaluation and compilation of data and make recommendations on needed improve-ments in experimental techniques. They are normally closely associated with active researchin the relevant field.
The technical scope of the NSRDS is indicated by the principal categories of data compilationprojects now active or being planned: nuclear properties, atomic and molecular properties, solidstate properties, thermodynamic and transport properties, chemical kinetics, and colloid andsurface properties.
The NSRDS receives advice and planning assistance from the National Research Councilof the National Academy of Sciences-National Academy of Engineering. An overall Review Com-mittee considers the program as a whole and makes recommendations on policy, long-term planning,and international collaboration. Advisory Panels, each concerned with a single technical area,meet regularly to examine major portions of the program, assign relative priorities, and identifyspecific key problems in need of further attention. For selected specific topics, the AdvisoryPanels sponsor subpanels which make detailed studies of users' needs, the present state of knowl-edge, and existing data resources as a basis for recommending one or more data compilationactivities. This assembly of advisory services contributes greatly to the guidance of NSRDSactivities.
The NSRDS-NBS series of publications is intended primarily to include evaluated referencedata and critical reviews of long-term interest to the scientific and technical community.
LEWIS M. BRANSCOMB, Director
III
Contents
Page
Forew ord ........................................................................................................... . IIIIntroduction................................................................... 1Table 1. lonizational potentials.............................................................................. 2Table 2. Ionization limits and lowest terms.............................................................. 6a-6iTable 3. Bibliography................................................ ............ .6
IV
Ionization Potentials and Ionization Limits Derived from theAnalyses of Optical Spectra
Charlotte E. Moore
A current table of ionization potentials expressed in electron volts and a detailed table givingthe limits from which they have been derived are presented. For each spectrum the ground term isgiven, with the limit as the ground state. The energy levels of terms of the lowest configuration deter-mined from ground state zero, are also included for selected spectra. The literature references usedfor each spectrum are indicated by number and listed in a bibliography with some 200 entries.
The latest recommended conversion factor (cm- to eV) 0.000123981 corresponding to 1 eV=8065.73 cm' has been used throughout.
Key words: Atomic spectra, ground terms; ground terms, atomic spectra; ionization limits; ionizationpotentials.
The data in the Volumes on "Atomic EnergyLevels" (AEL) [135], [136], [137], include theionization limits known for individual spectra. Thelatest table of ionization potentials calculated fromthese limits was published as Table 34 in VolumeIII (1958). Much work has been done since then andthere has been a steady demand for a revision ofthis Table.
A fairly comprehensive general bibliography hasrecently been published [194] which lists for eachspectrum the literature references on analyses ofatomic spectra dating from the entries in the respec-tive Volume of "AEL" (1949), (1952), (1958), wellinto 1968. The present compendium is based largelyon the references in this Bibliography, with some,but probably not all, later material.
The reliability of the data recorded in the litera-ture is often difficult to appraise. In cases wherelong series are known in the various spectra, theionization potentials are well determined. Withthese as key points, good values can be derived byextrapolation or interpolation along isoelectronicsequences, or by comparison along the rows in thePeriodic Chart for spectra of similar stages of ioniza-tion. Frequently, however, authors give values ofionization potentials without stating the conversionfactor used and without describing clearly how thequoted value was obtained.
For this reason, the present paper includes notonly the ionization potentials in eV, but also, thelimits in cm-1 from which these have been derived.Table 1 gives the ionization potentials in eV foreach spectrum.
The conversion factor taken from [195] was usedfor Table 1, since it is the value currently recom-mended by the National Academy of Sciences-National Research Council. However, recent meas-urements [200] suggest that this value may be inerror by about 30 parts per million. Therefore, itshould be understood that all of the significantfigures included in Table 1 may not be meaningful
in an absolute sense. This applies particularly toentries with magnitudes greater than 100 eV.
All limits have been multiplied by the factor0.000123981 to obtain the entries in Table 1, i.e.,1 eV=8065.73 cm-1. The factor used in "AEL"was 0.00012395 and has been superseded. As a re-sult, in the present table there are systematic dif-ferences from the 1958 Table, caused by the changein the conversion factor, as well as the differencescaused by improved values of the limits.
Italics denote ionization potentials derived fromlimits that are bracketed in Table 2.
In compiling Table 1 the author has attempted toindicate roughly the various degrees of accuracy ofthe limits. Those based on well-established seriesdeserve the greatest weight. When the ionizationpotential is given to three places, it is felt that thethird place is meaningful. The two- and one-placeentries are less well defined, but it is hoped thatthey have some significance. The limits of errorassigned by the various investigators provide ageneral criterion, but these are given for compara-tively few spectra. Users should, therefore, consultthe limits given in Table 2 and the references inorder to evaluate the data for individual spectra.
Table 2 contains the basic data for each spectrum.As in Table 1, the successive stages of ionizationare indicated at the heading of each column: i,denoting first spectra (neutral atoms); Ii, secondspectra (singly ionized atoms), etc. The elementsare arranged in order of increasing atomic number,Z. The ground state is indicated for each spectrum,together with the ionization limit in cm-'. In everycase this limit refers to the ground state of the ionin the next higher stage of ionization. The limits oferror are quoted from the original authors. Althoughnot specifically defined, these afford a general guideas to the reliability of the limit.
Although all limits are based on data derivedfrom the analyses of optical spectra, they are deter-mined in various ways, since reliable series are
1
TABLE I. Ionization potentials*
SpectrumZ Element
I II III IV V VI VII VIII IX X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
H
He
Li
Be
B
C
N
0
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
Rb
Sr
Y
Zr
Nb
Mo
13.598
24.587
5.392
9.322
8.298
11.260
14.534
13.618
17.422
21.564
5.139
7.646
5.986
8.151
10.486
10.360
12.967
15.759
4.341
6.113
6.54
6.82
6.74
6.766
7.435
7.870
7.86
7.635
7.726
9.394
5.999
7.899
9.81
9.752
11.814
13.999
4.177
5.695
6.38
6.84
6.88
7.099
54.416
75.638
18.211
25.154
24.383
29.601
35.116
34.970
40.962
47.286
15.035
18.828
16.345
19.725
23.33
23.81
27.629
31.625
11.871
12.80
13.58
14.65
16.50
15.640
16.18
17.06
18.168
20.292
17.964
20.51
15.934
18.633
21.19
21.8
24.359
27.28
11.030
12.24
13.13
14.32
16.15
122.451
153.893
37.930
47.887
47.448
54.934
62.707
63.45
71.64
80.143
28.447
33.492
30.18
34.83
39.61
40.74
45.72
50.908
24.76
27.491
29.310
30.96
33.667
30.651
33.50
35.17
36.83
39.722
30.71
34.22
28.351
30.820
36
36.95
40
43.6
20.52
22.99
25.04
27.16
217.713
259.368
64.492
77.472
77.412
87.138
97.11
98.91
109.24
119.99
45.141
51.37
47.30
53.46
59.81
60.91
67.10
73.47
43.266
46.707
49.1
51.2
54.8
51.3
54.9
55.2
59.4
64
45.71
50.13
42.944
47.3
52.5
52.6
57
61.8
34.34
38.3
46.4
340.217
392.077
97.888
113.896
114.240
126.21
138.39
141.26
153.71
166.77
65.023
72.68
67.8
75.02
82.66
84.41
91.66
99.22
65.23
69.3
72.4
75.0
79.5
75.5
79.9
82.6
93.5
62.63
68.3
59.7
64.7
71.0
71.6
77.0
81.5
50.55
61.2
489.981
552.057
138.116
157.161
157.93
172.15
186.50
190.47
205.05
220.43
88.049
97.03
91.007
100.0
108.78
111.1
119.36
128.12
90.56
95
99
102
108
103
108
127.6
81.70
88.6
78.5
84.4
90.8
93.0
102.6
68
667.029
739.315
185.182
207.27
208.47
224.94
241.43
246.52
263.22
280.93
114.193
124.319
117.56
127.7
138.0
140.8
150.17
161.1
119.27
125
129
133
139
134
155.4
103.0
111.0
99.2
106
116
125
126.8
871.387
953.886
239.09
264.18
265.90
284.59
303.17
309.41
328.23
348.28
143.456
154.86
147.24
158.7
168.5
173.7
184.7
196.46
151.06
157
162
166
174
192.8
126
136
122.3
129
153
1103.089
1195.797
299.87
327.95
330.21
351.10
371.73
379.10
400.05
422.44
175.814
188.54
180.02
193.2
205.8
209.3
221.8
235.04
186.13
193
199
203
230.9
150
162
146.2
1362.164
1465.091
367.53
398.57
401.43
424.50
447.09
455.62
478.68
503.44
211.270
225.32
215.91
230.5
244.4
243.3
262.1
276
224.5
232
238
277.1
177
191
2
TABLE I. Ionization potentials* - Continued
Spectrum- Continued
XI XII XIII XIV XV XVI XVII XVIII XIX XX XXI
1648.659
1761.802
442.07
476.06
479.57
504.78
529.26
538.95
564.13
591.25
249.832
265.23
255.04
270.8
286.0
290.4
305
321.2
266
274
324.1
206
1962.613
2085.983
523.50
560.41
564.65
591.97
618.24
629.09
656.39
685.89
291.497
308.25
298.0
.314.4
.330.8
.336
352
368.8
310.8
374.0
2304.080
2437.676
611.85
651.63
656.69
686.09
714.02
726.03
755.47
787.33
336.267
355
343.6
361.0
379
384
401
419.7
2673.108
2816.943
707.14
749.74
755.73
787.13
816.61
829.79
861.33
895.58
384.30
404
392.2
411
4.30
435
454
3069.762
3223.836
809.39
854.75
861.77
895.12
926.00
940.36
974.02
1010.64
435.3
457
444
464
484
490
3494.099
3658.425
918
968
974
1136.2
489.5
512
499
520
542
3946.193
4120.778
1034
1087
1266.1
546.8
571
557
579
4426.114
4610.955
1157
1403.0
607.2
633
619
4933.931
5129.045
1547
671
698
5469.738
1698
738 1856
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
3
TABLE I. Ionization potentials* - Continued
SpectrumZ Element
I II III IV V VI VII VIII IX X
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
Xe
Cs
Ba
La
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Hf
Ta
w
Re
Os
Ir
Pt
Au
Hg
Ti
Pb
Bi
7.28
7.37
7.46
8.34
7.576
8.993
5.786
7.344
8.641
9.009
10.451
12.130
3.894
5.212
5.577
5.47
5.42
5.49
5.55
5.63
5.67
6.14
5.85
5.93
6.02
6.10
6.18
6.254
5.426
7.0
7.89
7.98
7.88
8.7
9.1
9.0
9.225
10.437
6.108
7.416
7.289
15.26
16.76
18.08
19.43
21.49
16.908
18.869
14.632
16.53
18.6
19.131
21.21
25.1
10.004
11.06
10.85
10.55
10.72
10.90
11.07
11.25
12.1
11.52
11.67
11.80
11.93
12.05
12.17
13.9
14.9
18.563
20.5
18.756
20.428
15.032
16.69
29.54
28.47
31.06
32.93
34.83
37.48
28.03
30.502
25.3
27.96
33
32.1
19.175
20.20
21.62
23.71
25.2
23.3
34.2
29.83
31.937
25.56
54
40.734
44.2
37.41
36.72
38.95
33.3
42.32
45.3
72.28
56
58.75
57.45
68.8
56.0
108
70.7
88.3
137
4
TABLE I. Ionization potentials* -ContinuedSpectrum
Z ElementI II III IV V
84 Po 8.42
-86 At
86 Rn 10.748
87 Fr
88 Ra 5.279 10.147
89 Ac 6.9 12.1
90 Th 11.5 20.0 28.8
91 Pa
92 U
93 Np
94 Pu 5.8
95 Am 6.0
*lcm-=0.000123981 eV.
known for only a limited number of spectra. For theH i and He i isoelectronic sequences, the theoreti-cal values quoted here are well determined. Edlen,[44], [45], [46], [47], has made a detailed study offormulae for extrapolating ionization limits alongsequences of the lighter elements. His values areextensively quoted in Table 2.
Catalan and his associates, [22 to 27], have inter-polated values for spectra of neighboring elementsin the same stage of ionization. These have beenused for spectra in which series are not known.Russell, [166], Sugar and Reader, [156], [181] andothers, have described similar general relationshipsbetween spectra, that can be used to derive fairlyreliable limits.
In Table 2 all ionization limits were recorded thatwere derived from observed series, from extrapola-tion or interpolation as described above (Edlkn,Catalan, etc.), or from theoretical calculations suchas those of the H i and He I series. When all avail-able data from these sources had been entered, ifgaps still remained for spectra of a given elementin successive stages of ionization, the interveninglimits were entered in brackets, as for Ti VIII andTi ix. These limits, in brackets, represent calculatedvalues interpolated or extrapolated from observeddata, and reported in two general tables of ionizationpotentials in which different methods have beenused. For scattered spectra of the elements S vthrough Zn xix, the table of Lotz, [116], has beenquoted. For larger atomic numbers, the entries inbrackets are from the table of Finkelnburg andHumbach, [65]. No attempt has been made, however,to quote all such calculated values.
The need for higher ionization limits within agiven spectrum increases as laboratory researchon absorption series in the vacuum ultraviolet, onseries produced with synchrotron radiation as a
source, and the like, advances. At the request ofworkers in these fields, all components of the groundterm, and in selected cases, all levels from theground configuration, are entered in Table 2. Alllevels above the ground state are relative to theground state zero. For example, in the format of"AEL," the lowest levels of 0 I are as follows:
Desig. AEL Table 2
2p4 3P 2 0.000 109837.02=Limit3PI 158.265 158.265
3Po 226.977 226.977'D 2 15867.862 15867.862'So 33792.583 33792.583
In compiling Table 2, the energy levels of onlythe ground term have been included for complexspectra, particularly with increasing Z. It is wellknown that in rare-earth spectra low configurationsand low terms overlap in many cases. Consequently,many more low energy levels may be known thanthose of the ground term. Users are urged to recog-nize this limitation of the Table and to consult theliterature references for further details concerningthe low levels that have been reported for individualspectra.
As in "AEL" estimated values of energy levelsare given in brackets. Similarly, "x" denotes thatthe energy level is not connected by observationwith the others.
In Table 2, under the term designations for eachspectrum, the numbers in italics at the lower left,refer to Table 3. This table is a Bibliography whichcontains the literature references used for eachspectrum to obtain the limits and terms quoted inTable 2.
5
The importance of stating, clearly, how a limit oran ionization potential has been derived cannot beoveremphasized. It is hoped that the present tableswill enable each user to judge the quality of theavailable data used to compile Table 1.
Although the foregoing results are limited tooptical spectra, it should be recognized that experi-mental values of ionization energies have, also,been published. A surface ionization method hasbeen used to obtain ionization potentials for firstspectra of rare earths, [196 to 198]. In general, theagreement is satisfactory between the values ob-tained by the different methods.
Estimates of ionization potentials of third spectraof the lanthanons have been calculated recently"by applying the Born-Haber cycle to the group3A oxides and arsenides." [199].
After the work on the present publication hadbeen started, the author learned that extensiverevisions of the data on the spectra of lighter ele-ments were being prepared by B. Edlkn, J. 0.Ekberg, and L. A. Svensson, in Lund. They havemost generously furnished much valuable material,in advance of publication, for inclusion here. Theauthor is deeply indebted to these colleagues whoseexpert judgment and advice greatly enhance thevalue of the present publication. She is equallygrateful to all others who have so willingly con-tributed their unpublished material.
Washington, D.C.April 22, 1970
Table 3. Bibliography
References
1. Albertson, W., Astroph. J. 84, No. 1, 26-72 (1936).2. Albertson, W., Phys. Rev. 52, 644-647 (1937).3. Alexander, E., Feldman, U., and Fraenkel, B. S., J. Opt.
Soc. Am. 55, No. 6, 650-653 (1965).4. Alexander, E., Feldman, U., Fraenkel, B. S., and Hoory, S.,
J. Out. Soc. Am. 56, No. 5, 651-652 (1966).5. Andersson, E., and Johannesson, G. A., unpublished mate-
rial (1969).6. Andrew, K. L., and Meissner, K. W., J. Opt. Soc. Am. 49,
No. 2, 146-161 (1959).7. Bauche, J., Blaise, J., and Fred, M., J. Opt. Soc. Am. 54,
No. 4, 565 (A) (1964).8. Blaise, J., Fred, M., Gerstenkorn, S., and Judd, B. R.,
Compt. Rend. 255, 2403-2405 (1962).9. Bockasten, K., Ark. Fys. (Stockholm) 10, No. 40, 567-582
(1956).10. Bockasten, K., unpublished material (1963).11. Bockasten, K., J. Opt. Soc. Am. 54, No. 8, 1065 (L) (1964).12. Bockasten, K., unpublished material (1969), based on
unpublished data communicated by Wu, C. M., andCrooker, A. M.
13. Bockasten, K., and Edlhn, B., private communication(1970).
14. Bockasten, K., Hallin, R., and Hughes, T. P., Proc. Phys.Soc. (London) 81, Part 3, No. 521, 522-530 (1963).
15. Bockasten, K., and Johansson, K. B., Ark. Fys. (Stockholm)38, No. 31, 563-584 (1968).
16. Birgstrm, A., Ark. Fys. (Stockholm) 38, No. 12, 243-260(1968).
17. Bowen, I. S., Astroph. J. 121, No. 2, 306-311 (1955); 132,No. 1, 1-17 (1960).
18. Bromander, J., unpublished material (Uppsala 1969), fromdata by Glad, S.; See Ark. Fys. (Stockholm) 7, No. 2, 7to 32 (1954).
19. Bromander, J., and Johansson, B., J. Opt. Soc. Am. 57,No. 9, 1158-1159 (L) (1967).
20. Bryant, B. W., J. Opt. Soc. Am. 55, No. 7, 771-779 (1965),with revision by J. Sugar (1970).
20a. Camus, P. et Tomkins, F. S., J. de Phys. 30, No. 7, 545-550 (1969).
20b. Camus, P. et Tomkins, F. S., Premiere Reunion Ann. del'Assoc. Europeenne de Spectroscopie Atomique, Ab-stract 67, Paris-Orsay (1969).
21. Catalin, M. A., Meggers, W. F., and Garcia-Riquelme, 0.,J. Res. Nat. Bur. Stand. (U.S.), 68A (Phys. and Chem.)No. 1, 9-59 (Jan.-Feb. 1964).
22.
23.24.
25.
26.
27.
28.
29.
30.
31.
32.33.
34.
35.36.37.
38.
39.
40.
41.
42.
43.44.
45.
46.
47.
Catalan, M. A. y Rico, F. R., An. Real Soc. Esp. Fis. yQuim. (Madrid) [A] 48, Nos. 11, 12, 328-338 (1952).
Catalan, M. A. y Rico, F., letter (Dec. 1956).Catalin, M. A. y Rico, F., An. Real Soc. Esp. Fis. y Quim.
(Madrid) [A] 53, Nos. 3. 4, 85-94 (1957).Catalan, M. A. y Rico, F. R., An. Real Soc. Esp. Fis. y
Quim. (Madrid) [A] 54, Nos. 9, 10, 289-300 (1958).Catalan, M. A. y Rico, F., An. Real Soc. Esp. Fis. y Quim.
(Madrid) [A] 54, Nos. 9, 10, 301-308 (1958).Catalin, M. A. y Velasco, R., An. Real Soc. Esp. Fis. y
Ouim. (Madrid) [A] 48, Nos. 9, 10, 247-266 (1952).Chaghtai, M. S.-U.-Z., J. Opt. Soc. Am. 59, No. 8, 969-970
(1969).Charles, G. W., J. Opt. Soc. Am. 56, No. 10, 1292-1297
(1966).Cohen, L., Feldman, U., and Kastner, S. 0., J. Opt. Soc.
Am. 58, No. 3, 331-334 (1968).Conway, J. G., and Worden, E. F., J. Opt. Soc. Am. 58,
No. 11, 1564 (A) (1968).Cowan, R. D., Astroph. J. 147, No. 1, 377-379 (L) (1967).Cowan, R. D., J. Opt. Soc. Am. 58, No. 7, 924-933 (1968),
and Edlhn, B., unpublished material (1970).Cowan, R. D., and Peacock, N. J., Astroph. J. 142, No. 1,
390-396 (L) (1965).Crooker, A. M., private communication (December 1955).Crooker, A. M., unpublished analysis (1962).Crooker, A. M., and Dick, K. A., Canadian J. Phys. 46,
No. 10, 1241-1251 (1968).Crooker, A. M., and Joshi, Y. N., J. Opt. Soc. Am. 54, No.
4, 553-554 (L) (1964).Deutschman, W. A., and House, L. L., Astroph. J. 144,
No. 1, 435-437 (L) (1966).Deutschman, W. A., and House, L. L., Astroph. J. 149,
No. 2, Part 1, 451-452 (1967).Dick, K. A., Canadian J. Phys. 46, No. 11, 1291-1302
(1968).Edlen, B., Mon. Not. Roy. Astron. Soc. 114, No. 6, 700-
703 (1954).Edlin, B., Trans. Intern. Astron. Union 9, 218-226 (1955).EdlWn, B., "Atomic Spectra," Hand. der Phys., Encycl. of
Phys. 27, 172 (1964).Edlhn, B., "Atomic Spectra," Hand. der Phys., Encycl. of
Phys. 27, 196 (1964).Edl-n, B., "Atomic Spectra," Hand. der Phys., Encycl. of
Phys. 27, 198 (1964).Edlhn, B., "Atomic Spectra," Hand. der Phys., Encycl. of
Phys. 27, 200 (1964).
6
-__--_-_._TABLE 2. Ionization limits and b
IV
Spectrum
V VI VII VIII IX------Is68
is2
2p4 3P2 109837.02
0.063P, 158.2653Po 226.977'D2 15867.862'So 33792.583
17, 54, 57
2p5 2P,, 140524.5
0.42pO 404.1
48, 115
2po 'So 173929.70133
3s 2So0 , 41449.440.03
162
2So,2 109678.764
'So 198310.760.01
250,2 43487.1500.005
'So 75192.07
2p-1 2 66928.100.1
2P112 15.254
3Po 90820.420.1
3p, 16.403P2 43.40'D 2 10192.63iSo 21648.01
2So,2 146882.86
'So 202887.40.8
2p0,2 196664.7
2p,2 63.42
119, 169a
2s
90
2s2
93
2p
48, 142
2p2
94
2p 3
55, 123
28324026810.726830.540466.940468.4
17, 46, 135
2p4 3P2
282058.6
x-1.5
3P, 341.031 489.9'D2 20873.4'S~ 44918.1
is 2So,2 987660.1
49, 68
is2 iSo 1241259.4
145
2s 2So,2 305931.10.6
140
2s2
'So 386241.02
13, 141
382704174.36
443086113.9306.9
2027443186
5057775
3408434120
51558
511800642.9920.4
25840.855750
5778001366
is 2So1, 1756018.768
Js2 'So 2092001.4
49, 145
2s 25o,, 520178.41.5
9, 49, 140
2s2 IS, 624866
377, 141
2p 210>2 624383.82.0
2P1,1 385.9
19, 48
2p2
3Po 7028303p, 225.2
3p2 612.2'D 2 25234.4'So 53537
17, 46, 135
2p3 4S,1 7833002D 21.[41217]2D. 412622po , 624172pi,
1 62423
17,46
2p4 3P2 797800
3p, 1105.5Po 1576
'D 2 30839.4'So 66492
17, 44, 46, 135
is 2S012 2744105.149, 68
1s 2 'So 316239549 30
2s 2S011 789537.23.0
76
2s2 'So 9186574
15
2p 2P81. 9214302Po 744.5
46, 48
2p2
3P0 10180003P, 4143P2 1112
'D 2 30293'So 63899
17,46
2p3 4S,, 11162002D,,, 483372D,,, 483622po, 73221
2P;.,, 73260
44, 46, 135
49, 81,
2s92
2s2
141
2p
18, 48
2p
2 3P0
13885003Pi 698312 1858'D" [35518]'So [74434]
17, 46, 135
is 2So,25380089
68
1s2 'So 5963135
145
2s 2So, 149362949
is 2S 0,12 3952061.4
49, 68
1s2 'So 445275849, 145
2s 2Som 1114008
14,49 10
2s2 IS, 126762249
2p 2PN0- 1273800
2NI11 131014, 46, 48
'So 1671792
2p 2P01 16815002P?1 2139
46, 48
Is68
Is 2
145
2s49
2s'46
25,,2 7028393
7693810
2S01 1928462
2130800
Is68
2So,2 8897240
is2 'So49, 145
2s46
9645005
2So1, 2418700
is 2So01 1 1098687649, 68
1s 2
129ASo 11817061
XII ________ I ____
is68
2Som 13297676
Z Element
s2 'So 610079.0
0.1
II III
Is68
25o01 438908.85
145
2132 3po 238750.51.3
3p, 48.7312 130.8'D2 15316.2'So 32688.8
owest terms
2s249
53
2p3
XII
117225.419224.46419233.17728838.92028839.306
2D o22DI'/2
2p o22p 2
2p 2
53, 78
2p
48,
2p2 3po
311
I1D2
ISo10, 17
2D02-1
2D1112
2p' S11,
21)1'12
135, 144
2p4 3P
2
'P01D2
ISO
17, 46, 146
2ps 2P1;2
46, 48
143
2ps
48, 146
2p6
12
2p',2 330391.02lP)7, 780.45
'So 3813951
6
X XI 3
ISO
'SO
TABLE 2. Ionization limits and lowest t c
r III III
I 1 + 4 -- 'So 61671.02
0.02159
Al
Si
P
S
Cl
Ar
K
Ca
3s
161
3s2
2S,, 121267.610.05
'So 151860.40.5
135
3p 212P% 131838.4
0.12Pi,, 287.32
172
3p 21)0,1 48278.37
0.0221)1,, 112.061
56
"31' P0 65747.50.6
3P, 77.1153P2 223.1571D2 6298.850IS~ 15394.370
150
3p3 4S;i, 845802D;, 12 11360.82D211 11376.421) ,. 18722.65211, 18747.95
118
3p4 3P2 83558.031, 396.093Po 573.65'D2 9238.58ISo 22179.99
88, 98
3pa 2211/ 104591.0
0.32})1,, 882.36
151
3p0 S~ 127109.90.1
1.35, 191
4s 2S,, 35009.770.02
162
4s2 'S, 49305.72160
118
3p3
17,47
3p
4
47, 98
3p-
130
3p6
134
159100164.8469.0
8882.621576.2
451 , 1882002D; ~ 14853.02D1,/ 14884.82P1, 24524.92P,,2 24571.6
3P2 1920703P 1 696.13Po 996.4'D 2 11653.5'So 27877.8
2P)1/ 222848.22P1,, 1431.41
'So 255076
4s 2S01 95751.870.03
50
2p8 IS, 64641020
3s 25, 229445.71
0.287
3s2 'S~ 270139.30.4
186
3p 2P01 243400
211, 559.647, 135
3p2 31P 280900
3P1, 297.23P2 832.5
'D 2 11320.8'So 27159.1
17, 47, 1353
p3 4S;1 319500
2D;,,, 18053.02D21, 18118.6
2p00, 29812.82Piv 29905.6
17, 47
3p4 312 3286003P, 1112.13Po 1570.2'D2 14010.0'So 33265.7
17, 47, 1353p
5 2p , 368800
2P, 216652, 182
3p 'So 410614.116
Spectrum
IV
2 p5 2P,,/ 881100
2Por 222746, 48
2p6
'So 96780046
3s
185
3s2
135
3p
135
V
2p4 3P2 11394003P, 17803P 2519
'D2 35890iSo 77254
44, 46, 135
2p 5 2P11,1239800246 , 3442
46, 48
2S0,2 364093.1 2p6 'So 13451000.6 46
iS~ 414312.4
21)1,, 381541.42P1, 950.2
3p 2 :Po3p13p21D2ISO
431226491
13411376732547
17, 135
3p3 4Si.1, 482400
2DI,,, 21090.72D.1 21219.521),, 34856.22P,, 35033.1
17, 135
3p4 3P2 4913003p 1 16733po 2325'D 2 16384.0'So 38546.2
17, 135, 182
3) 2P1, 5412002PI,, 3118.0
16, 52
3s 2So, 52446045
3s2 iSo [586200]116
3p 2P-12 547000
2P1, 1492135
3p2 3P0 605100
3Y, 765
312 2030'D, 16300'So 37913
17, 135
3 p3 'Si, [666700]2D1, 24012.72D7,i 24249.5
21),, 3975821);,, 40077
17, 1163p4 3P2 680800
31), 24063'0 3276'D2 18830.1
17, 135, 182
, VI
Mg |3s2
VII
2p3
4S>, 15043002D2,,, 552452Di,, 552662PI,, 83805211,, 83927
44, 46, 135
2p4 3112 1536300
31 27363P~ 3831'D2 41140iSo 88210
44, 46, 135
2p 5 2101,16539002P',1 5097
46, 48
2p 'So 177790046
3s 2So,, 710184
45
3s2 'So [782600]116
3p 2P),, 7340402p, 2208
52
3p2 311 [806600]3P, 11323P 2 2924'D 2 18978
52, 116, 135
3 p3 4 SD1, [877400]2D,,, 268512D , 27267
52, 116
VIII IX X
2p 2pl,, 21447002P11 3302.2
46, 48
2p2 3P0 18143003P, 11273P 2 2939'D2 [41003]'So [85191]
17, 46, 135
2p3 4Sx19473002 DOI, 620802 D2.,2 621402Pa,, 943802P;,, 94650
44, 46, 135
2 p4 3P2 19884003P1 4030
3Po 5570
'D2 46550'So 99330
44, 46, 135
2p5 21)01) 21231002P0, 7268
46, 48, 135
2p6 'So 226590046
3s 2So,, 92105145
3s2 'So 100273052
3p 2P1,, 9482002Pi,, 3133
52
3p 2 31)0 103000031', 16283P2 4075'D2 21864
52, 135
229540017404440
244530067140+x67420+x
103320+x103900+x
249560057577826
52450+xI10 9 7 0 +x
264740010087
2p6 'So 280910046
3s 2So,, 115708052
3s2 'S,, 124910052
3p =P ~2 1187600
2P', 430452
2s2 'So 264520046
2p 2PI, 26634002P,,2 4890
46, 48
2p 2 3Po3p13p2
46, 135
283190025906460
2p2 3P(,
tIP,,p.,
46, 1.35
p D ,r
2p
46, 135
2p4 sP2sP,;P(,
'D2ISO
46, 135
2p2 2P', 2
2P 446, 48 2
2s 2S011 2964400 is2 ISo 1421026146 129
2s2 So 3214800 2s 2S0, 356560046 46
2p 2P-12 32378002Pi,, 6988.7
46, 48
2p2 3Po 3423900
3P, [3705]3P2 [9050]'D2 593301S0 119430
42, 46, 135
2p3 4Sin 36061002D1,,, 77670+x2 D012 78800+x2P11 [122230]+x2P11 1 1
2 4 080+x40, 46, 135
2p4 3P2 36749003P, 108803P0 14140'D 2 61000+x'So 130310+x
39, 46, 135
2p5 2P,2 3860900
2P10, 18067
46, 48
3s 2S0, 1418070 2p1 'So52 46
4060600
2s2 i S, 383980046
2p 2P-0,1 38681002P 1
970046, 135
2p2
3po
3p,
'1240, 46
2p3 4SIO,
2Di12
2D o2P1,,
40, 46
2p4 3p23pi
39, 46
40714005200
12400
426890091960+x
[94000]+x141150+x144200+x
43470001439018230
2p 21)i,,, 45501002P1, 23475
46, 48
3s2 'S 1520700 3s 2S,2 1704050 2p iSo 476890052 52 46
XI
is 2So,,, 1582995149, 68
1s 2 'So 16825022129
2s 250, 4222400
46
2s 2 'So 452010046
2p 2P0,,2 45543002P,2 13135.3
46, 48
2p2 3Po3p1
3p240, 46
47747007200
16600
2p3 4S,,,, 498660040, 46
2p4 3p 2 5074100
3P, 189703p0 23250
40, 46, 59
2p5 2P',,2 52943002P1, 30044
46, 48
XII
is 250/2 1858413868
1s 2 IS, 19661693129
2s 2So,2 493500046
2s 2 So 525590046
2p 2P0,,, 52967002P !/2
46
2p2 3p0 5533800
3p, 99003P2 21900
40, 46
2p3 4S11, 5759100
46
2p4 31)2 5856000
31), 24460311 28860
46, 59, 89
XIII XV XVI XVII XVIII-+ 1 4 4 *1 I 4 4 .4 4 t
is 2So,, 2156063049, 68
is2
1So 22720766129
2s 2,/, 570360046
2s2 'So 604720046
2p 2P1i, 60955002P1i, 22657
42, 46, 48
2p 2 3P, 63488003P1
3P246
2p3 4Si1, 658660046
XIV
is 2So,1 , 2475994268
Ys2 'So 26002663129
2s 2So, 652830046
2s2 iSo 689420046
2p 2P-12 69508002P1,/2
46
2p 2 3Po 72198003P, 175583P2
3592246, 89
is 2So11 2818253549, 68
is2
ISO 29507950129
is 2So,,, 3182901249, 68
2s 2So,, [7404400] 1s2 iSo 33237173116 129
is 2Som,, 3569993668
t i-
2s2 iSo [7807600] 2s 2So, [8340000] Is2 'So 37190818 is 2So,, 39795865
116 116 129 49, 68
2p 2PI, [7856000]
116
1s2 'So 41369608
129is 2So,, 4411754749, 68
z Element
2p3 4Si,,, 2998300
2D?1 731672DI,, 737302P1, 1134572PiZ,/ 114430
46, 135
2p4 3P2 3057700
3P, 79703Po 10630'D2 58000+xiSo 122300+x
46, 135
2p5 2Pi,, 3226700
2P,,z 1364146, 48
2p" 'So 340730046
3p2 3P13P1 ,3P2
'D2iso
6b
2s2 IS [8767000] 2s 2S,,, [9332000]116 116
erms -- continued
I I I
i i iI I I T
XVII
XVIII XIXXIII xv XVII xx
TABLE 2. Ionization limits and lowest terms -- continued
3d 4s2
27, 135
3d2
4s2
27, 73
2D ,, 52750
2D2 11 168.34
2;F
.. 4
55010170.132386.874
21
22
23
24
25
26
27
28
29
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
II
3d 4s
135, 166
3d2 4s
135, 166
3d4
135, 188
3d5
102
3D, 1032403D2 67.683D3 177.63AD2 2540.97
4F,1 ,2 1095064F211, 93.944F3112 225.474F4112 393.22
5Do 1182005D, 36.055D2 106.635 D3 208.895D4 339.21
6521 133060
3d5
4s 7S3 126145.00.6
86
3d6 4s 6D41/
6D31/
136, 166
3d6 3F4
130524384.77667.64862.63977.03
137572950.45
1597.20166, 187
3d9 2D2 1 146541.562D,,, 1506.94
174-
3d'0 'So 163669.20.5
163
III
3d 2D,,,, 1997002D21, 197.5
25, 135
3d2 3F23F33F41D2
3p03P,
3P 251
3d 3
83
4F /2
4F2 2
4 F:i24'r2
3d 4 5D05D 15D2
5D3
5D4
136
3d5
69
221735184.9420.4
8473.510538.410603.610721.2
236145.5341.5583.8
24970059.9
181.9355.8575.0
6S21, 271550
3d6 5D45D35D2
5D1
5D0
74, 136
3d7 4F411
4F
4F1112171
3d8 3F43 F33F2
27, 170
247221436.2738.9932.4
1027.3
270200841.2
1451.31866.8
2837001360.72269.6
3d9 2D2,2 297100
2 D 1112 2071.8136
IV
3 p6
52'So 592600
3d 2 D,1 , 3489732D2 382.1
51
3d2 3F2
3F3
3F41D2
85
3d3 4F1112
4F2614F4Fet1
116, 136
37673040
325.4734.7
10959.3
[396000]244561956
3d4 'Do [413000]5D, 98.45D2 286.85D3 552.75D4 885.4
116, 138
3d5 6S2,, [442000]116
3d6 SD4 [SD3SD2
SD,SDo
116
3d7 4F411
4F6144Fra
116, 148
[413800]
[442800]1188.42040.92618.8
3d8 3F4 4451241600
3F 3 1862.53F 2 3078.5
169
V
3ps 2p1 :
2p12
52, 182
3p.52
ISo
7393004318
800300
3d 2D 112 [526100]2D211, 620
85, 116, 135
3d2 3F2 [559000]3F3 5133F4 11461D2 13200
116, 136
3d3 4F,112 [584000]
4F2112 3494F3 2 , 8274F4112 1406
116, 136
3d4 5 Do [604900]5D1 1455D2 4195D3 8045D4 1285
116, 136
3d 6S21, [641200]116
3d6 5D4
5D3
5D2
5D1
'Do116
3d7
116
[609000]
4F411, [644500]4F
4F g
VI
3p4 3P2api
apo1D 2
135, 182
89600033484458
21398
3ps 2p112 9627002p0,, 5829
52, 182
3pe 6S0 1033400 52
3d 2D 1112 7304002D2112 920
3
3d2 3F2 [766000]3F3 7463F4 1669'D 2 15337
17, 116, 136
3d3 4F,,, [798500]
4F212 510.94F3112 11894F4112 2002
17, 116
3d4 5D01 D15D2
5D3
5D4
116, 136
[823000]208586
11291789
3d5 6S2,; [871000]
116
3d6 5D 4
365D2
5D1
5Do116
[831000]
Spectrum
VII
3p3 * 4S,[1113100]2D 11 295652DzI, 30247
52, 116
3p4 3p2aPi3p5'D2
135, 182
3 p5
52,
113600045305884
24130
2P, 1, 12112002p,
1 , 7660
135
3p6 iSo136
1299700
3d 2D,,,2 962001
2D21,, 1355136
3d 2 3F23F33F417, 116
[1008000]10512327
3d3 4F,11[1040000]4F2 1 6984F3112 16104F4,12 2723
116, 136
3d4 5Do
1 D15D2
5D3
5D,
116, 136
[1073000]27580215202379
3d5 6S1,, [1121000]
116
VIII
3p2 3p, 12800003P, 22723P2 5505'D 2 25035
52, 60, 135
3p3 4S* ,21359000
2D ,12 32168
2D2,, 3323933, 52
3p4 3p2 14010003P, 60003p0 7580'D 2 27120
135
3p5 2p- ,,[1490000]
2P, 1 2 9900116, 136
3p6 'So [1584600]116
3d 2D,,,, 12184002D 2112 1850
3, 32, 34
3d2 3F2 [1266000]3F: 14303F4 3140
4, 116
3d3 4F,12 [1307000]4F21124F31124F4112
116
IX
3 p
52
2p, 14520002P1 5761
3p2 3po [1558000]3p, 3125
3p2 7291'D 2 28557
52, 116, 183
3p3
116
4Si11, [1659900]
3p4 3p123p,3p6
116, 136
[1688000]78609600
3ps 2P1, [1789000]2P, 1i 2 12530
116, 136
3ps ISo 18958003
3d 2Dos,2 1501300
2D21 , 24403, 75
3d2 3F2 [1557000]3F3 18903F4 4110
58, 116
X
3s2
52
3 p
52
'So 1817400
2P0,, 1741500
2P1,, 7542
3p2 3po3p,
3P260, 116
[1859200]43109540
3p3
116
3p
4 3P2
ap1apo
116, 136
3p5
89,
2p1
136
3p6 iso3
3d 2D,,,
2D2,r
3, 67
3d 2 3F2aFa3F4
58, 116
3d: 4s2 4F2 544004F,1;2 137.384 F 323.424F,, 553.02
27, 135
3d5 4s 7S3 54570103
3d5 4s2 6S, 11 59970
21
XI
3s52
3s2
52
3 p
52
2S011 2015080
iSo 2139300
2P8,, 20571002P 01 9692
3 p2 3po
3Pi312
116
3 p3
116
[2184000]
4S1, [2307000]
3p 4 3P23p13p0
89, 136
3Ps 2Pi 1 ,
2POs
75, 136
3Ps iSo3
3d 2D,,,2D 21/2
3
234200012667.914440
246200019420
2591000
2146000
XII
2p6
46
3s52
3s2
52
iSo 5532200
2So, 2351140
iso 2486300
3p 2PI), [2403600]2m1 12200
60, 116
3p2 3po3p,3P2
116
3p3
116
3p 4 3P23p 1
3p 0116
[2535900]
4Sie [2668000]
[2710000]
3p5 2p ,1 [2839000]2p,, 23627.3
89, 116
is5 [2975000]
XIII
2p5 z~,
2p 9
46, 59
iso2p6
46
3s
52
3s2
136ISO
609340037900
6350400
2So0 , 2712250
2862000
3p 2P0, [2771400]2p 1 16400
62, 116
3p2 apo3p13p2
89, 116
3 p3
116
[2912000]9302.6
18561.1
4Si1 [3057000]
3p4 ap 2 [3097000]apt 19541.8apo [20200]
89, 116, 136
3p1
116
2pi,,, [3234000]2 PO,
I i I I I .
2p+
46
2 p5
46,
2p6
46
3s
136
3s2
136
XIV
3P2 66929003P,
3P0
2P-. 69473002P8, 4719059
iSo 7223500
2So,,, 3099630
iso 3260000
3p 21Po,, [3163000]2p,,: 18850.6
89, 116
3p2 apoap13p 2
116, 136
3 pa116
[3315000][11834]
45 11. [3468000]
3p 4 3p 2ap,ape
116
[3509000]
2p446
XV
4S?11. 7468900
2p4 3p 23p1
46
2ps
30, 4
2p646
3s
136
3s2136
3p
116
7584700
2p 11, 7856200
2pgs
iSo 8151600
2So, 3511210
'So 3684000
2Po,,, [3581000]2Pi,/,
3p 2 3po
8 p989, 116
[3742500]14917.527376.5
3 p3
116
2p6 Io5
136
3s
136
3s2
136
3 p
89,
XVI
9164300
2So1 3947840
iSo 4133000
2p,, [4025000]YP16 27761.4116
2p" 'S0136
3s
136
3s2
116
3p
116
XVII
10211700
2So, 4410480
ISO [4606000]
XVIII
2p6 'So136
3s136
3s2
116
11316400
2So01 4897400
iS, [5106000]
Z
[2003000]1000011700
211400015682.9
2230000
18110003150
[1871000]24855465
Element
3d6 4s2 5D 4 63480
5D 3 415.9325D2 704.0035D, 888.132SDo 978.076
27, 43
3d7 4s2
4F4 112 634304F 31 , 816.00
4F2112 1406.844F, ,, 1809.33
27, 136
3d8 4s2 3F4 615793F3 1332.1533F2 2216.519
136
4s 2So0 12 62317.2136
XIX XX
2p8 'So63
12477000
i i iI- i i
I
4S1n [1971000]
I
TABLE 2. Ionization limits and lowest t
SpectrumZ Element - -
II II IV V v VII VIII Ixx
'So 75768.10 I4s
122
2P ,2 48387.63 4s22P, 826.19 136
4s2
95
4p
96
4p
2
6, 97
4p
3
136
Zn
Ga
Ge
As
Se
Br
Kr
Rb
Sr
Y
Zr
2P 1 1 95284.80.5
2P ,, 3685.24
'So 112914.5
5s 20o,2 33690.810.01
91
5s2 'S~ 45932.00.2
70
4d 5s2 2D,,, 514472D 21 , 530.36
22, 1.36
4d2 5s2 3F2 551453F:, 570.413F4 1240.84
22, 136
4p 2P0-,, 128521.3
0.22Pi,1 1767.356
97, 100
4p2 3Po 1502903P1 1061
3p2 25381D 2 10097'So 22602
4p4 3P2 1758703P, 3136.43p0 3837.5'D2 12089.1ISo 27867.1
2PI, 196474.8
2P-, 5371.00
4p6 'S~ 220048
30
155a
2Som, 88964.0
'So 98690
4F,, 1059004F2 , 314.674F3 12 763.444F4 ,, 1322.91
3d10 IS 320390
141
4s2 'So 276036136
4p 2p-,2 228670
2P,1 2940
35, 136
4p
2 31 248583
3P1 1741
3P2 3937'D 2 13032
36, 136
4p
4 3P2 2980203p, 4548
3Po 5313
1D2 14644'So 33079
136
4p5
2Pis 320000
2Po, 7380136
4p6 'So [351800]
65
5s 2Soi, 16550024, 104
4d2 3F2 185400
3F3 680.53F4 1485.7
24, 104
3d9 2D 2 ,, [479100]2D112 2758.8
37, 116
3d10 ISo 517600136
2So,,, 368701
2P8,2 346375
2P, 11 4376
4p2 apo [381600]3P, 3247
3P2 6237
'D2 1811565, 136
4p
3 4Sie [423600]65
4p4 3P 2 [424400]3p,
3p0
2P-1 4600002P0, 9731
'So [498600]
2D,,, 2769702D2,, 1250
2S0o, 144892.62
IS, 165458 4s136
2S,,, 247700
3dS 3F4 [666000]3F33F2
116
3d10 1S0 753800
136
4s 2S0 ,2 505136136
4is2 iS0 [551000]
65
4p 2PO0 1 [481600]2P-I 6090
65, 136
4p
2 3Po [522000]3p1
3P2
65
4p3 4S ,2[572800]65
4p 4 3P2 [577700]
3Po65
4p' 2Pi, [621200]
2p0, 2 12459.9
65, 155
4p6 1S0 657600
28
3d 4F,1,, [1920000]4F21 2
116
3d7 4F4 12 [871000]4Fa24F2112
4F1",2116
3d10
iS0 1028800136
4s 2S 0,2 658994136
4s2 IS, [714800]65
4p 2p0- [633300]2P;./ 8108
61, 65
4p2 3p0 [680900]3p,
3p2
65
4p3 4Si./2 [732600]65
4p4 3P2 [750300]3p1
3p 0
65
3d6 SD4 [1081000]SDaSD2SD,-,Do
116
3d' 0 ISo 1253300136
4 s 2S0 1 2 [831000165
4s2 'So [895500]65
41, 2P)0I2 [80030012pO
65
4p2 3Po [855200!3P,>
3P265
4p
3 4SO, [935900]
65
3d5
6S2n, [1403000]116
3d10 'S, 1554700
136
4s 2Sn [1016500]65
4s2 So [1098000]65
4p 'P ,, [986700]2P
0
65
4p2 'P~ [1041000]3p,
65
3d4 5D0 [1637000]5D,5D2
5D35D4
116
3d'0 1S0 1862400106
3d 2D~/z [2507000]
116
4s 2Soz [1662000] 3d'0 'So 301680065 136
3p
6 IS, [3385000]116
3p5
2P,, [3662000]2 PO
116 0/
3p4 3p 2 [3952000]3p1
3p0
116
3p
3 4S 1 [4372000]
1163p2 3P0 [4670000]
3p 1
3p 2
116
3p 2pe, , [4993000]2p
116
3s2 1S0 [5630000] 3s 2So,, 5952000 2p
6
116 164 1633d2 3F2 [2210000]
3F, 30303F4 6735
58, 116
3d10 'So 2613800136
4s 2S,, [1210000] 3d' 'So 223510065 136
4s2 'So [1307000]65
41) 2P [1179500]
6 2Pi65
4s 2So,, [1428000]65
4s2 'So [1541000]65
4s136
3Po 63715
10
3P, 557.13413p2 1409.9609'D2 7125.2989'So 16367.3332
4Si, 79165
136
4p
5
184
4p
6
136, 147
35
4p
3
26
4s2 'So 404369
136
4p4 3P2 78658.223P, 1989.49
3p0 2534.35
'D 2 9576.08'So 22446.03
4S,2 170900
erms-continued
XI XII XIIIJ XIV XVJ XVIJ XVIIJ XVIIIj XIX X
4p
36, 136
4p
3
136'SZ 289529
152, 184
4p
5
132, 136
5s136
5s2
22
4d2 5s
23, 136
65
4p
5
136
4p
6
65
4d
104
6d
TABLE 2. Ionization limits and lowest terms - continued
4d4 5s 6D 1, 555116Di ,= 154.19
6D,,= 391.996D3 1, 695.25
6D4, 1050.26
41
42
43
44
45
46
47
48
49
50
51
52
Spectrum
4d4 5Do 1155005D1 158.995D2
438.385D3 801.385D4 1224.87
6S21, 130300
7S3 123100
4F4112 1352004F3112 1523.14F112 2493.94F1112 3104.2
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
22
4d5 5s137
4d5
5s2
137
4d 7 5s
101
4d8 5s
137
4d'0
137
5s137
5s2
137
5S2 5p
96
5p2
137
5 p3
137
7S3 57260
6S 2 1 , 58700
5F5 594105F4 1190.645F3 2091.545F2 2713.245F 1 3105.49
4F4112 60197SF3112 1529.974F2112 2598.034F111, 3472.68
'So 67236.0
2S 0112 61106.50
iSo 72538.8
2P 1 ,1 46670.110.05
2p 1 12 2212.598
3Po 59231.83p, 1691.83P 2 3427.7
4S 11. 69700
4511 1500003000
5p4 3P2 1543041
3p, 7087.03Po 6447.9
121
I
23, 136
4d5
137
4d 5s137
4d7
175
IV
4d2 3F2 3086003F3 1086.43F4 2344.6
136
4d3 4F, 112 3741804F21/ , 780.04F311, 1759.04F41/2 2858.6
137
4d3 4F1 . 2020004F211 , 515.84F311 , 1176.6F4112 1939.0
24, 82
4d4 5 D0 2191005D 243.105D2 669.605D3 1225.205D
4 1873.80
158
4d5 6S ,223830024
4d6 5D4 2296005D3 1158.85D2 1826.35D1 2266.35Do 2476.0
137
4d7 4F411 , 2505004F3 ,11 2147.84F211, 3485.74F 1 2 4322.0
84, 137
4d8 3F4 265600
3F, 3229.33F2 4687.5
173
4d9 2D21 2809002D11 2 4607
137
4d1o iSo 302300137
5s 2So, 226100137
5s2 iSo 246020.0137
5s2 5p 2P 112 204248
2P, 1, 6576
137
5p2 3po 2255003p, 4756.53P2 8166.9
38
5p3 4Si2 [266000]65
V VI VIIVII I
- I 1 I-
4d 2 D1 ,12 4077002D2112 1870
104, 136
4d2 3F2 4933603F3 15853F4 3359
137
4d iSo 583000137
5s 2Soii 449300137
5s2 iSo 47390038
4p6 iSo 82730028
4d 2D,11, 549000
2D211 2578104, 137
4d10 iSo 868000137
5s 2So11, 57000038
4p5 2P 1 11 10050002p 19199
28, 136
4p6 iSo 102280028
4db iSo 1107000137
4p5
2p;1 , 12350002P 23273
28, 137
Z ElementII
- -t
4do iSo 439000
137
5s 2So1 , 328550.0137
5s2 iSo 356156
137
5s2 5p 2P81 2, 301776
2P 1 1 , 9222.638
5p4 3P2 72667
3P1 4751
3Po 4707137
5p5 2Pi,, 84295.1
0.22po 11, 7603.15
131
4d8 3F4 1458003F3 2401.33F2 3580.7
137
4d9 2D 112 156700
2D111 3539137
'So 173300
2S 1, 136374.74
'So 152195
2P 11, 118017.0
2Pi1 , 4251.4
5p2 3Po 133327.5
3P1 3055.0
3P2 5659.0
di137
5s137
5s2
137
5s2 5p
137
53
137
5 p3
79
z
0
-0
CV)m-
6e
I VIII IXx
TABLE 2. Ionization limits and lowest terms - continued
ZI ElementSpectrumt _ _I II 1III IIIV V VI
2S 012 31406.432 5p 6
0.010 137
54
55
56
57
58
59
60
61
62
63
5p6
137, 147
6s
5p4 3P2 2590893P, 9794.63Po 8131
137
5d 6s2
2D, 1 2 15466415
2D 2 112 1603.26
iSo 97834.0 5p 5
137
Xe
Cs
Ba
La
Ce
Pr
Nd
Pm
Sm
Eu
11
6s 2 iSo 42035.140.05
71
5d 6s 2 2D,, 2 449815
2D 21/2 1053.2072, 137
4f 5d 6s2 'G4 44090
-110120, 156a
4f3 6s
2 4I41/2 43730
-150
4I51/2 1376.54
4I61/2 2846.614I71/2
156, 193
6s137
5d2 6s2
181
4f 5d2
80, 149, 181
4f3 6s
181
4f4 6s
181, 190
4f5 6s
153, 181
4f 6 6s
1, 181
4f7 6s
167, 181
2p',,2
171068.4
2p0-1 ,10537.01
'So 202263
20,2 80686.87
3F2 89200650
3F3 1016.103F4 1970.70
4H3,12 87500650
4H.11 987.624H. 12 1873.954
H6112 2382.26
5I: 85100} 650
sI 441.94516 1649.015I7 2998.31
I 4437.09
613112 86500650
614,2 513.3306151,2 1470.10061612 2585.46061712 3801.935
618,2 5085.650
7H$ 87900-650
'Hs 446.457 1133.457H 1983.527H 2950.317H 7
7Hg
8F0,1 , 89300
6508F,1: 326.64
8F2 11 2 838.22
8F3.12 1489.168F41 2 2237.978F5,, 3052.65
8F6 1 3909.62
9S4 90700
3H4 162900120
3H5 1526.363H6 3127.05
4f3
4I4112 174420
130I12 1398.34
4I61/2 2893.141 1 2 4453.76
177, 180
4f5 6s2 6H2112 44800
1506H 1,2 803.82
6H412 1748.786H5,,2 2797.10
6H612, 3919.036H 1 S2 5089.79
154, 156
4f 2F2 1,2 2962002F31/2 2253
113
4f2 3H4 314200100
3H5 2152.23H6 4389.1
179
4f 2F11 2 463400
4002F 112 3027.4
99
4f4 6s2 5I4
515
516
5I7518
156, 190
44270150
1128.0552366.5953681.6905048.605
139
4f2
178
4f6 6s2 7Fo
7F,
7F2
7F3
7F4
7F5
7F6
45420150292.58811.92
1489.552273.093125.464020.66
2, 156
4f7 6s 2
sS3012 4574080
168
6f
TABLE 2. Ionization limits and lowest terms -- continued
Z Element SpectrumI II III I IV V VI
64
65
66
67
68
69
70
71
72
73
4f 7 Sd 6s 1OD,,2 979003000
1OD03,, 261.81
'0D4,,2 633.2710D51,2 1158.9410D6 1O, 1935.30
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Hf
Ta
4f7 5d 6s2 9D 49530110
9D 215.139D 532.989D 999.119Ds 1719.06
156a, 165
4f9 6s2 6H,,, [47200]150
6H 6/,
156, 176
4f10 6s2 sI8 47820150
SI7 4134.24SI6 7050.6115,/
SI431, 156
4f 1 6s
2 51712 48540
150
1565
4f12 6s2 aH6 49210150
3H5 6958.343H4 10750.99
117, 156
4f 1 6s
2 2F1/2 49840
1502FI,/2 8771.25
126, 156
4f 1 6s2 iSo 50441.0
-0.220a
5d 6s2 2D 11 43762.39~0.10
2D2 1 0 1993.9220b, 110
4d2 6s2 FF2 56600aF3 2356.683F4 4567.64
127-
5d3 6s2 4F111, 63600
4F2 /, 2010.104F 11 , 3963.924F11 , 5621.04
137
6s 2 iSo 1120003000
181
5d 6s2 2D 11 2 120000
2D2112 3050.88137
165, 181
4f9 6s
181
4f1 o6s
31, 181
4f" 6s
181
4f 12 6s
125, 181
4f13 6s
126, 181
4f" 6s128
5d 2D 112 268500800
2D 21 ,, 4692.0111
7H8 92900650
7H7
7H67H57H4
7H37H2
6181,2 94100650
617112 4341.106161,2 7485.096151,2 7463.886I4112 9432.076I31,2 10953.94
5Is 95200650
5I75I1
5It
4H6112 96200650
4H5112 7149.74H4112 11042.84H3112 10894.1
3F4 97200650
3F 236.943F2 8769.69
2S01,2 98150
4f13 2F3 112 191200500
2F21/2 8774.02180a
4f14 iSo 203300
20
5d2 3F2 1878003F3 3288.73F4 6095.1
111z
0
6g
TABLE 2. Ionization limits and lowest terms - continued
SpectrumZ Element
I II III IV V VI
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
w
Re
Os
Ir
Pt
Au
Hg
T
Pb
Bi
Po
At
Rn
Fr
Ra
Ac
6p137
7s2 'So 42577.35137
6d 7s2 2D,,2 [55600]
2D 2112 2231.4365, 137
5d4 6s
2 5D 644005D1
1670.295D2
3325.535D3 4830.005D 4
6219.33114, 137
Sd5 6s2 6S211, 63530
137
5d6 6s2 SD4 70450SD3 4159.32SD 2 2740.495D 1 5766.145D 6092.79
108, 137
5d 7 6s2 4F4112 73000800
4F3112 6323.964F2112 5784.634F 112 4078.95
107
Sd9 6s 3D3 723003D 2 775.93D 1 10132.0
137
5d10 6s 2SO1o2 74410.0137
6s2 iSo 84184.1137
6s2 6
p 2p, 1 2 49266.7
0.1157 2p , 1 2 7792.7
6p2 3P 59819.40.3
3P1 7819.26263P2 10650.3271
189
6p3 4S 112 58790137
6p4
3P2 67885.3
3P1 16831.613P 7514.69
29
2D 211 1497232D, 11 8419.9
iSo 165000
2S1x 151280
iSo 1647655
2p8112 121243
32p1 1 , 14081.074
Po 1346003P1 133243P2 17030
2So, 81842.31
'So 97300
5d10 iSo 276000137
6s 2S5l/, 240600137
6s 2 iSo 2575925
137
6s2
6p 2P4/ 2 2061802P; 1 220788
137
2SO12 3413506s137
6s2 'So 365500137
5d'0 iSo 555000137
6s 2S01 451700137
5d1 iSo 712000137
5d9
137
5d10137
5d10 6s137
6s2 -
137
6s 2 6p
137, 189
6p2
137
7s137
7s2
137
'So 86692.5
6h
TABLE 2. Ionization limits and lowest terms - Continued
SpectrumZ Element
I II III IV V VI
6d2 7s2 3F23F3 2869.2603F4 4961.661'
192
5f6 7s2
7Fo 47000
7F 1 2203.557F2 4299.557F3 6144.347F4 7774.457F5 9179.057F6 10238.24
7,8
5f7 7s2 8s51,2 48770
66
6d2 7s 4F111, [93000]
4F2112, 1521.914F311, 4146.574F 4 11, 6213.55
65, 124
6d2 3F2 1610003F3 3992.73F4 6474.9
109
5f 2F21 1, 2319002F 11, 4325.38
112
6i
Th
Pa
U
Np
Pu
Am
90
91
92
93
94
95
9
0
References - Continued
48. Edlkn, B., Solar Physics 9, No. 2, 439-445 (1969).49. Edlhn, B., unpublished material (1969), (1970).50. Edlkn, B., and Risberg, P., Ark. Fys. (Stockholm) 10, No.
39, 553-566 (1956).51. Edlkn, B., and Swensson, J. W., unpublished material
(Jan. 1970).52. Ekberg, J. 0., and Svensson, L. A., unpublished material
(Jan. 1970).53. Eriksson, K. B. S., Ark. Fys. (Stockholm) 13, No. 25, 303-
329 (1958).54. Eriksson, K. B. S., Ark. Fys. (Stockholm) 30, No. 16, 199-
202 (1965).55. Eriksson, K. B. S., Ark. Fys. (Stockholm) 33, No. 25, 357-
360 (1966).56. Eriksson, K. B. S., and Isberg, H. B. S., Ark. Fys. (Stock-
holm) 23, No. 47, 527-542 (1963); 33, No. 39, 593-595(1966).
57. Eriksson, K. B. S., and Isberg, H. B. S., Ark. Fys. (Stock-holm) 37, No. 17, 221-230 (1968).
58. Even-Zohar, M., and Fraenkel, B. S., J. Opt. Soc. Am. 58,No. 10, 1420-1421 (1968).
59. Fawcett, B. C., Burgess, D. D., and Peacock, N. J., Proc.Phys. Soc. (London) 91, Part 4, No. 574, 970-972 (1967).
60. Fawcett, B. C., Gabriel, A. H., and Saunders, P. A. H.,Proc. Phys. Soc. (London) 90, Part 3, No. 569, 863-867(1967).
61. Fawcett, B. C., Jones, B. B., and Wilson, R., Proc. Phys.Soc. (London) 78, Part 6(i), No. 505, 1223-1226 (1961).
62. Fawcett, B. C., and Peacock, N. J., Proc. Phys. Soc. (Lon-don) 91, Part 4, No. 574, 973-975 (1967).
63. Feldman, U., Cohen, L., and Swartz, M., Astroph. J. 148,No. 2, 585-587 (1967).
64. Feldman, U., Cohen, L., and Swartz, M., J. Opt. Soc. Am.57, No. 4, 535-536 (1967).
65. Finkelnburg, W., und Humbach, W., Naturwiss. 42, 35-37(1955).
66. Fred, M., and Tomkins, F. S., J. Opt. Soc. Am. 47, No. 12,1076-1087 (1957).
67. Gabriel, A. H., Fawcett, B. C., and Jordan, C., Proc. Phys.Soc. (London) 87, Part 3, No. 557, 825-839 (1966).
68. Garcia, J. D., and Mack, J. E., J. Opt. Soc. Am. 55, No. 6,654-685 (1965).
69. Garcia-Riquelme, 0., Opt. Pura y Aplicada (Madrid) 1,No. 2, 53-72 (1968).
70. Garton, W. R. S., and Codling, K., J. Phys. B (Proc. Phys.Soc. London) [2] 1, No. 1, 106-113 (1968).
71. Garton, W. R. S., and Tomkins, F. S., Astroph. J. 158,No. 3, 1219-1230 (1969).
72. Garton, W. R. S., and Wilson, M., Astroph. J. 145, No. 1,333-336 (1966).
73. Giuliani, J. F., and Thekaekara, M. P., J. Opt. Soc. Am.54, No. 4, 460-463 (1964).
74. Glad, S., Ark. Fys. (Stockholm) 10, No. 22, 291-340 (1956).75. Goldsmith, S., J. Opt. Soc. Am. 59, No. 12, 1678-1679
(L) (1969).76. Hallin, R., Ark. Fys. (Stockholm) 31, No. 36, 511-526
(1966).77. Hallin,)R., Ark. Fys. (Stockholm) 32, No. 11, 201-210
(1966).78. Hallin,R., unpublished material (1969).79. Handrup, M. B., and Mack, J. E., Physica 30, No. 7, 1245-
1275 (1964).80. Harrison, G. R., Albertson, W. E., and Hosford, N. F.,
J. Opt. Soc. Am. 31, No. 6, 439-448 (1941).81. Herzberg, G., and Moore, H. R., Canadian J. Phys. 37,
No. 11, 1293-1313 (1959).82. Iglesias, L., J. Opt. Soc. Am. 45, No. 10, 856-861 (1955).83. Iglesias, L., An. Real Soc. Esp. Fis. y Ouim. (Madrid) [Al
58, Nos. 7, 8, 191-222 (1962); Opt. Pura y Aplicada(Madrid) 2, 132-145 (1969).
84. Iglesias, L., Canadian J. Phys. 44, No. 4, 895-915 (1966).85. Iglesias, L., J. Res. Nat. Bur. Stand. (U.S.), 72A (Phys.
and Chem.) No. 4, 295-308 (July-Aug. 1968).
86. Iglesias, L., y Velasco, R., Publ. Inst. Opt. (Madrid) No. 23,228 pp. (1964).
87. Isberg, B., Ark. Fys. (Stockholm) 35, No. 45, 551-562(1967).
88. Jakobsson, L. R., Ark. Fys. (Stockholm) 34, No. 2, 19-31(1967).
89. Jefferies, J. T., Mem. Soc. Roy. des Sci. de Liege 54,Part 2, Section 3, 213-234 (1969).
90. Johansson, I., Ark. Fys. (Stockholm) 15, No. 14, 169-179(1959).
91. Johansson, I., Ark. Fys. (Stockholm) 20, No. 7, 135-146(1961).
92. Johansson, L., Ark. Fys. (Stockholm) 20, No. 33,489-498(1961).
93. Johansson, L., Ark. Fys. (Stockholm) 23, No. 12, 119-128(1962).
94. Johansson, L., Ark. Fys. (Stockholm) 31, No. 15, 201-235(1966).
95. Johansson, I., and Contreras, R., Ark. Fys. (Stockholm)37, No. 31, 513-520 (1968).
96. Johansson, I., and Litzn, U., Ark. Fys. (Stockholm) 34,No. 46, 573-587 (1967).
97. Kaufman, V., and Andrew, K. L., J. Opt. Soc. Am. 52,No. 11, 1223-1237 (1962).
98. Kaufman, V., and Radziemski, L. J., Jr., J. Opt. Soc. Am.59, No. 2, 227-228 (L) (1969).
99. Kaufman, V., and Sugar, J., J. Res. Nat. Bur. Stand. (U.S.),71A (Phys. and Chem.) No. 6, 583-585 (Nov.-Dec.1967).
100. Kaufman, V., and Ward, J. F., J. Opt. Soc. Am. 56, No.11, 1591-1597 (1966).
101. Kessler, K. G., J. Res. Nat. Bur. Stand. (U.S.), 63A (Phys.and Chem.) No. 3, 213-251 (May-June 1959).
102. Kiess, C. C., J. Res. Nat. Bur. Stand. (U.S.) 47, No. 5,385-426 (1951), RP2266.
103. Kiess, C. C., J. Res. Nat. Bur. Stand. (U.S.) 51, No. 5,247-305 (1953), RP2457.
104. Kiess, C. C., J. Res. Nat. Bur. Stand. (U.S.) 56, No. 4,167-177 (1956), RP2663.
106. Kim, H. H., J. Opt. Soc. Am. 58, No. 5,739-740(A) (1968).107. van Kleef, Th. A. M., Physica 23, No. 9, 843-897 (1957).108. van Kleef, Th. A. M., and Klinkenberg, P. F. A., Physica
27, No. 1, 83-94 (1961).109. Klinkenberg, P. F. A., Physica 16, Nos. 7, 8, 618-650
(1950).110. Klinkenberg, P. F. A., Physica 21, No. 1, 53-62 (1954).111. Klinkenberg, P. F. A., van Kleef, Th. A. M., and Noorman,
P. E., Physica 27, No. 12, 1177-1188 (1961).112. Klinkenberg, P. F. A., and Lang, R. J., Physica 15, Nos.
8, 9, 774-788 (1949).113. Lang, R. J., Canadian J. Research A14, 127-130 (1936).114. Laun, D. D., and Corliss, C. H., J. Res. Nat. Bur. Stand.
(U.S.), 72A (Phys. and Chem.) No. 6, 609-755 (Nov.-Dec. 1968).
115. Lidn, K., Ark. Fys. (Stockholm) 1, No. 9, 229-267 (1949).116. Lotz, W., J. Opt. Soc. Am. 57, No. 7, 873-880 (1967).117. Marquet, L. C., and Davis, S. P., J. Opt. Soc. Am. 55, No.
5, 471-474 (1965).118. Martin, W. C., J. Opt. Soc. Am. 49, No. 11, 1071-1085
(1959).119. Martin, W. C., J. Res. Nat. Bur. Stand. (U.S.), 64A (Phys.
and Chem.) No. 1, 19-28 (Jan.-Feb. 1960) and un-published material (1970).
120. Martin, W. C., J. Opt. Soc. Am. 53, No. 9, 1047-1050(1963).
121. Martin, W. C., and Corliss, C. H., J. Res. Nat. Bur. Stand.(U.S.), 64A (Phys. and Chem.) No. 6, 443-479 (Nov.-Dec. 1960).
122. Martin, W. C., and Kaufman, V., J. Res. Nat. Bur Stand.(U.S.), 74A (Phys. and Chem.) No. 1, 11-22 (Mar.-Apr.1970).
123. McConkey, J. W., and Kernahan, J. A., Phys. Lett. (Amster-dam) 27A, No. 2, 82-83 (1968).
7
References - Continued
124. McNally, J. R., Jr., Harrison, G. R., and Park, H. B., J. Opt.Soc. Am. 32, No. 6, 334-347 (1942).
125. McNally, J. R., Jr., and Vander Sluis, K. L., J. Opt. Soc.Am. 49, No. 2, 200 (1959).
126. Meggers, W. F., Rev. Mod. Phys. 14, Nos. 2, 3, 96-103(1942).
127. Meggers, W. F., unpublished analysis (1959).128. Meggers, W. F., and Moore, C. E. (Editor), J. Res. Nat.
Bur. Stand. (U.S.), 71A (Phys. and Chem.) No. 6, 396-544 (Nov.-Dec. 1967).
129. Midtal, J., and Aashamar, K., Norvegica 2, No. 2, 99-109(1967).
130. Minnhagen, L., Ark. Fys. (Stockholm) 18, No. 8, 97-134(1960).
131. Minnhagen, I.., Ark. Fys. (Stockholm) 21, No. 26, 415-478(1962).
132. Minnhagen, L., unpublished material (September 1967).133. Minnhagen, L., private communication (June 1969).
134. Minnhagen, L., and HallWn, K., private communication(1969).
135. Moore, C. E., "Atomic Energy Levels," Nat. Bur. Stand.(U.S.), Circ. 467, Vol. I (1949).
136. Moore, C. E., "Atomic Energy Levels," Nat. Bur. Stand.(U.S.), Circ. 467, Vol. 11 (1952).
137. Moore, C. E., "Atomic Energy Levels," Nat. Bur. Stand.(U.S.), Circ. 467, Vol. III (1958).
138. Moore, F. .. , Jr., unpublished material (1967).139. Odabasi, H., J. Opt. Soc. Am. 57, No. 12, 1459-1463 (1967).140. Olme, A., Ark. Fys. (Stockholm) 40, No. 2, 35-47 (1969).141. Olme, A., unpublished material (1970).
142. Olme, A., Edlhn, B., Johns, J. W. C.. and Herzberg, G.,See J. Opt. Soc. Am. 60, No. 7, 889-891 (1970).
143. Palenius, H. P., Ark. Fys. (Stockholm) 37, No. 23, 368-369 (A) (1968); 39, No. 3, 15-69 (1968); 39, No. 39,425-427 (1969).
144. Palenius, H. P., First Ann. Conf. European Assoc. At. Sp.(A), Paris-Orsay (1969) and unpublished material (1969).
145. Pekeris, C. L., Phys. Rev. 112, No. 5, 1649-1658 (1958);126, No. 4, 1470-1476 (1962).
146. Persson, W., and Minnhagen, L., Ark. Fys. (Stockholm)37, No. 22, 273-300 (1968).
147. Petersson, B., Ark. Fys. (Stockholm) 27, No. 23, 317-319(1964).
148. Poppe, R., Physica 40, No. 1, 17-26 (1968).149. Racah, G., Bull. Research Council Israel 5A, 78 (1955).150. Radziemski, L. J., Jr., Andrew, K. L., Kaufman, V., and
Litzn, U., J. Opt. Soc. Am. 57, No. 3, 336-340 (1967).151. Radziemski, L. J., Jr., and Kaufman, V., J. Opt. Soc. Am.
59, No. 4, 424-443 (1969).152. Rao, Y. B., Indian J. Phys. 32, No. 11, 497-515 (1958).153. Reader, J.. and Davis, S. P., Program, Atomic Sp. Sym.
posium, Nat. Bur. Stand. (U.S.), p. 79 (A) (1967).154. Reader, J., and Davis, S. P., J. Res. Nat. Bur. Stand. (U.S.),
71A (Phys. and Chem.) No. 6, 587-599 (Nov.-Dec. 1967).155. Reader, J., and Epstein, G. I.., J. Opt. Soc. Am. 60, No.
1, 140 (L) (1970).155a. Reader, J., and Epstein, G. L., private communication
(April 1970).156. Reader, J., and Sugar, J., J. Opt. Soc. Am. 56, No. 9, 1189-
1194 (1966).156a. Reader, J., and Sugar, J., J. Opt. Soc. Am. 60, in press
(L) (1970).157. Reeves, E. M., Garton, W. R. S., and Bass, A., Proc. Phys.
Soc. (London) 86, Part 5, No. 553, 1077-1080 (1965).158. Rico, F. R., An. Real Soc. Esp. Fis. y Ouim. (Madrid) [Al
61, Nos. 3, 4, 103-118 (1965).159. Risberg, G., Ark. Fys. (Stockholm) 28, No. 32, 381-395
(1965).160. Risberg, G., Ark. Fys. (Stockholm) 37, No. 18, 231-249
(1968).
161.
162.
163.165.166.167.
168.
169.169a.
170.
171.
172.
173.
174.175.
176.
177.178.
179.
180.
180a.181.
182.
183.
184.
185.
186.
187.
188.
189.
190.191.
192.193.194.
195.
196.
197.
198.
199.
200.
Risberg, P., Ark. Fys. (Stockholm) 9, No. 31, 483-494(1955).
Risberg, P., Ark. Fys. (Stockholm) 10, No. 41, 583-606(1956).
Ross, C. B., Jr., Thesis, Purdue University (June 1969).Russell, H. N., J. Opt. Soc. Am. 40, No. 9, 550-575 (1950).Russell. H. N., J. Opt. Soc. Am. 40, No. 9, 618-619 (1950).Russell, H. N., Albertson, W., and Davis, D. N., Phys. Rev.
60, No. 9, 641-656 (1941).Russell, H. N., and King, A. S., Astroph. J. 90, No. 1,
155-203 (1939).Schrder, J. F., Dissertation, Amsterdam (1970).Seaton, M. J., Proc. Phys. Soc. (London) 88, Part 4,
No. 562, 815-832 (1966).Shenstone, A. G., J. Opt. Soc. Am. 44, No. 10, 749-759
(1954).Shenstone, A. G., Canadian J. Phys. 38, No. 5, 677-692
(1960).Shenstone, A. G., Proc. Roy. Soc. London [Al 261, No.
1305, 153-174 (1961).Shenstone, A. G., J. Res. Nat. Bur. Stand. (U.S.), 67A
(Phys. and Chem.) No. 2,87-112 (Mar.-Apr. 1963).Shenstone, A. G., unpublished material (Dec. 1965).Shenstone, A. G., and Meggers, W. F., J. Res. Nat Bur.
Stand. (U.S.) 61, No. 5, 373-411 (1958) RP2908.Sugar, J., J. Res. Nat. Bur. Stand. (U.S.), 66A (Phys. and
Chem.) No. 4, 321-324 (July-Aug. 1962).Sugar, J., J. Opt. Soc. Am. 53, No. 7, 831-839 (1963).Sugar, J., J. Opt. Soc. Am. 55, No. 1, 33-58 (1965) and
unpublished material (1970).Sugar, J., J. Opt. Soc. Am. 55, No. 9, 1058-1061 (1965)
and unpublished material (1970).Sugar, J., J. Res. Nat. Bur. Stand. (U.S.), 73A (Phys. and
Chem.) No. 3, 333-381 (May-June 1969).Sugar, J., J. Opt. Soc. Am. 60, No. 4, 454-466 (1970).Sugar, J., and Reader, J., J. Opt. Soc. Am. 55, No. 10,
1286-1290 1965).Svensson, L. A., and Ekberg, J. 0., Ark. Fys. (Stockholm)
37, No. 7, 65-84 (1968).Svensson, L. A., and Ekberg, J. 0., Ark. Fys. (Stockholm)
40, No. 14, 145-163 (1969).Tech, J. L., J. Res. Nat. Bur. Stand. (U.S.), 67A (Phys. and
Chem.) No. 6, 505-554 (Nov.-Dec. 1963).Toresson, Y. C., Ark. Fys. (Stockholm) 17, No. 12, 179-192
(1960).Toresson, Y. G., Ark. Fys. (Stockholm) 18, No. 28, 389-416
(1960).Velasco, R., and Adames, J., Publ. Inst. Opt. (Madrid) No.
26, 124 pp. (1966).Velasco, R., and Gull6n, M. N., Opt. Pura y Aplicada
(Madrid) 1, No. 2, 93-102 (1968).Wood, D. R., and Andrew, K. L., J. Opt. Soc. Am. 58, No.
6, 818-829 (1968).Wyart, J.-F., These, Univ. Paris (Orsay), 105 pp. (1968).Yoshino, K., J. Opt. Soc. Am. 59, No. 11, 1525-1526 (A)
(1969).Zalubas, R., J. Opt. Soc. Am. 58, No. 9, 1195-1199 (1968).Zalubas, R., unpublished material (1969).Moore, C. E., Nat. Bur. Stand. (U.S.), Spec. Publ. 306,
Sections 1-4 (1969).Beardon, J. A., and others, Physics Today 17, No. 2, 48-49
(1964).Ionov, N. I., and Mittsev, M. A., J. Exptl. Theoret. Phys.
13, No. 3, 518-519 (1961); 11, No. 4, 972-973 (L)(1960).Bakulina, I. N., and Ionov, N. I., J. Exptl. Theoret. Phys.
9, No. 4, 709-712 (1959).Smith, D. H., and Hertel, G. R., J. Chem. Phys. 51, No. 7,
3105-3107 (1969).Faktor, M. M., and Hanks, R., J. Inorg. Nucl. Chem. 31,
No. 6, 1649-1659 (1969).Taylor, B. N., Parker, W. H., and Langenberg, D. N., Rev.
Modern Physics 41, 375 (1969).
8
Announcement of New Publications on Standard Reference Data
Superintendent of Documents,
Government Printing Office,
Washington, D.C. 20402
Dear Sir:
Please add my name to the announcement list of new publications to be issued in the series:
National Standard Reference Data Series - National Bureau of Standards.
Name
Company
Address
City State Zip Code
(Notification Key N337)
Publications in the National Standard Reference Data SeriesNational Bureau of Standards
You may use this listing as your order form bychecking the proper box of the publication(s) youdesire or by providing the full identification of thepublication you wish to purchase. The full lettersymbols with each publications number and fulltitle of the publication and author must be givenin your order, e.g. NSRDS-NBS-17, Tables ofMolecular Vibrational Frequencies, Part 3, by T.Shimanouchi.
Pay for publications by check, money order, orSuperintendent of Documents coupons or depositaccount. Make checks and money orders payableto Superintendent of Documents. Foreign remit-
D NSRDS-NBS 1, National Standard Reference Data System-Plan of Operation, by E. L. Brady and M. B. Wallenstein,1964 (15 cents).
L NSRDS-NBS 2, Thermal Properties of Aqueous Uni-univalentElectrolytes, by V. B. Parker, 1965 (45 cents).
Q NSRDS-NBS 3, Sec. 1, Selected Tables of Atomic Spectra,Atomic Energy Levels and Multiplet Tables, Si ii, Si vi,Si iv, by C. E. Moore, 1965 (35 cents).
Q NSRDS-NBS 3, Sec. 2, Selected Tables of Atomic Spectra,Atomic Energy Levels and Multiplet Tables, Si i, by C. E.Moore, 1967 (20 cents).
Q NSRDS-NBS 3, Sec. 3, Selected Tables of Atomic Spectra,Atomic Energy Levels and Multiplet Tables, C i, C ii,C in, C iv, C v, C vi, by C. E. Moore, 1970 (in press).
Q NSRDS-NBS 4, Atomic Transition Probabilities, Volume 1,Hydrogen Through Neon, by W. L. Wiese, M. W. Smith andB. M. Glennon, 1966 ($2.50).
L NSRDS-NBS 5, The Band Spectrum of Carbon Monoxide, byP. H. Krupenie, 1966 (70 cents).
El NSRDS-NBS 6, Tables of Molecular Vibrational Frequencies,Part 1, by T. Shimanouchi, 1967 (40 cents).
Q NSRDS-NBS 7, High Temperature Properties and Decom-position of Inorganic Salts, Part 1, Sulfates, by K. H. Sternand E. L. Weise, 1966 (35 cents).
E NSRDS-NBS 8, Thermal Conductivity of Selected Materials,by R. W. Powell, C. Y. Ho, and P. E. Liley, 1966 ($1.00).
Q NSRDS-NBS 9, Bimolecular Gas Phase Reactions (rate co-efficients), by A. F. Trotman-Dickenson and G. S. Milne,1967 ($2).
E NSRDS-NBS 10, Selected Values of Electric Dipole Momentsfor Molecules in the Gas Phase, by R. D. Nelson, Jr., D. R.Lide, Jr., and A. A. Maryott, 1967 (40 cents).
Q NSRDS-NBS 11, Tables of Molecular Vibrational Frequen-cies, Part 2, by T. Shimanouchi, 1967 (30 cents).
L NSRDS-NBS 12, Tables for the Rigid Asymmetric Roto:Transformation Coefficients from Symmetric to Asym-metric Bases and Expectation Values of P, P, and P,by R. H. Schwendeman, 1968 (60 cents).
L NSRDS-NBS 13, Hydrogenation of Ethylene on MetallicCatalysts, byJ. Horiuti and K. Miyahara, 1968 ($1.00).
Q NSRDS-NBS 14, X-Ray Wavelengths and X-Ray AtomicEnergy Levels, by J. A. Bearden, 1967 (40 cents).
L NSRDS-NBS 15, Molten Salts, Vol. 1, Electrical Conduct-ance, Density, and Viscosity Data, by G. Janz, F. W. Dampier,G. R. Lakshminarayanan, P. K. Lorenz, and R. P. T. Tomkins,1968 ($3).
Q NSRDS-NBS 16, Thermal Conductivity of Selected Materials,Part 2, by C. Y. Ho, R. W. Powell, and P. E. Liley, 1968 ($2).
Q NSRDS-NBS 17, Tables of Molecular Vibration Frequencies,Part 3, by T. Shimanouchi, 1968 (30 cents).
tances should be made either by international moneyorder or draft on an American bank. Postage stampsare not acceptable.
No charge is made for postage to destinationsin the United States and possessions, Canada,Mexico, and certain Central and South Americancountries. To other countries, payments for docu-ments must cover postage. Therefore, one-fourthof the price of the publication should be added forpostage.
Send your order together with remittance toSuperintendent of Documents, Government PrintingOffice, Washington, D.C. 20402.
Q NSRDS-NBS 18, Critical Analysis of the Heat-Capacity Dataof the Literature and Evaluation of Thermodynamic Prop-erties of Copper, Silver, and Gold From 0 to 300 K, by G. T.Furukawa, W. G. Saba, and M. L. Reilly, 1968 (40 cents).
Q NSRDS-NBS 19, Thermodynamic Properties of Ammonia asan Ideal Gas, by L. Haar, 1968 (20 cents).
Q NSRDS-NBS 20, Gas Phase Reaction Kinetics of NeutralOxygen Species, by H. S. Johnson, 1968 (45 cents).
Q NSRDS-NBS 21, Kinetic Data on Gas Phase UnimolecularReactions, by S. W. Benson and H. E. O'Neal ($7).
E NSRDS-NBS 22, Atomic Transition Probabilities, Vol. II,Sodium Through Calcium, A Critical Data Compilation, byW. L. Wiese, M. W. Smith, and B. M. Miles ($4.50).
E NSRDS-NBS 23, Partial Grotrian Diagrams of AstrophysicalInterest, by C. E. Moore and P. W. Merrill, 1968 (55 cents).
E NSRDS-NBS 24, Theoretical Mean Activity Coefficients ofStrong Electrolytes in Aqueous Solutions from 0 to 1000 C,by Walter J. Hamer, 1968 ($4.25).
l NSRDS-NBS 25, Electron Impact Excitation of Atoms, byB. L. Moiseiwitsch and S. J. Smith, 1968 ($2).l
NSRDS-NBS 26, Ionization Potentials, Appearance Poten-tials, and Heats of Formation of Positive Ions, by J. L.Franklin, J. G. Dillard, H. M. Rosenstock, J. T. Herron, K.Draxl, and F. H. Field ($4).
E NSRDS-NBS 27, Thermodynamic Properties of Argon fromthe Triple Point to 300 K at Pressures to 1000 Atmospheres,by A. L. Gosman, R. D. McCarty, and J. G. Hust ($1.25).
E NSRDS-NBS 28, Molten Salts, Vol. 2, Section 1, Electro-chemistry of Molten Salts: Gibbs Free Energies and ExcessFree Energies From Equilibrium-Type Cells, by G. J. Janzand C. G. M. Dijkhuis. Section 2, Surface Tension Data, byG. J. Janz, G. R. Lakshminarayanan, R. P. T. Tomkins, andJ. Wong ($2.75).
Q NSRDS-NBS 29, Photon Cross Sections, Attenuation Coeffi-cients and Energy Absorption Coefficients and EnergyAbsorption Coefficients From 10 keV to 100 GeV, by J. H.Hubbell (75 cents).
E NSRDS-NBS 30, High Temperature Properties and Decom-position of Inorganic Salts, Part 2, Carbonates, by K. H.Stern and E. L. Weise (45 cents).
E NSRDS-NBS 31, Bond Dissociation Energies in SimpleMolecules, by B. deB. Darwent (55 cents).
E NSRDS-NBS 32, Phase Behavior in Binary and Multicom-ponent Systems at Elevated Pressures: n Pentane andMethane n Pentane, by V. M. Berry, 1970 (in press).
E NSRDS-NBS 33, Electrolytic and Conductance and theConductances of the Acids in Water, by W. J. Hamer andH. J. DeWane, 1970 (in press).
E NSRDS-NBS 34, Ionization Potentials and Ionization LimitsDerived from the Analyses of Optical Spectra, by C. E.Moore, 1970 (in press).
U.S. GOVERNMENT PRINTING OFFICE : 1970 OL-387-063
NBS TECHNICAL PUBLICATIONS
PERIODICALS
JOURNAL OF RESEARCH reports NationalBureau of Standards research and development in
physics, mathematics, chemistry, and engineering.
Comprehensive scientific papeof the work, including laboraprocedures, and theoretical and n1 nmatical analy-
ses. Illustrated with photographs, drawings, and
charts.
Published in three sections, available separately:
* Physics and Chemistry
Papers of interest primarily to scientists working in
these fields. This section covers a broad range of
physical and chemical research, with major emphasis
on standards of physical measurement, fundamental
constants, and properties of matter. Issued six times
a year. Annual subscription: Domestic, $9.50; for-
eign, $11.75*.
* Mathematical Sciences
Studies and compilations designed mainly for the
mathematician and theoretical physicist. Topics in
mathematical statistics, theory of experiment design,numerical analysis, theoretical physics and chemis-
try, logical design and programming of computers
and computer systems. Short numerical tables.
Issued quarterly. Annual subscription: Domestic,$5.00; foreign, $6.25*.
* Engineering and Instrumentation
Reporting results of interest chiefly-
and the applied scientist. This sec
of the new developments in instrfrom the Bureau's work in pl
data processing, and developmtIt will also cover some of th
applied mechanics, building -engineering. Issued quarterly.Domestic, $5.00; foreign, $6.25
to t tnginter
ationmeast
A test ii
>rk ini, and,ial sul-
NONPERIODICALS
Applied Mathematics Series. Mathematical tables,manuals, and studies.
Rniildino gpine Cpries. Research results, test
since criteria of building ma-
tt. tems, and structures.
Handbis.. ._eLu 1.. dended codes of engineeringand industrial practice (including safety codes) de-
veloped in cooperation with interested industries,professional organizations, and regulatory bodies.
Special Publications. Proceedings of NBS confer-ences, bibliographies, annual reports, wall charts,pamphlets, etc.
Monographs. Major contributions to the technicalliterature on various subjects related to the Bureau's
scientific and technical activities.
National Standard Reference Data Series.NSRDS provides quantitative data on the physical
and chemical properties of materials, compiled from
the world's literature and critically evaluated.
Product Standards. Provide requirements for sizes,types, quality and methods for testing various indus-
trial products. These standards are developed coopera-
tively with interested Government and industry groups
and provide the basis for common understanding of
product characteristics for both buyers and sellers.
Their use is voluntary.
Technical Notes. This series consists of communi-cations and reports (covering both other agency and
NBS-sponsored work) of limited or transitory interest.
ac8
Governd pror
d Bure,dardi,ms.
"n Processing Standards Pub-e official publication within
3r information on standardsr ed under the Public Law
the Budget Circular A-86
of Data Elements and Codes
TECHNICAL NEWS
The best single source of inform,
Bureau's research, developmentpublication activities, this m
designed for the industry-orieidaily work involves intimate cotechnology-for engineers, ch
search managers, product-devecompany executives. Annual$3.00; foreign, $4.00*.
* Difference in price is due to extra c
JLLI
.on corcoos:
ily pmdir
t wi
ts,
rip
C RINGHOUSE
fing thLive andcation isal whoseence and,ists, re-gers, anddomestic,
TheTechnicaunclassifirerated satomic e,further ir
.ring]formnforn
eaial
10
F for Federal Scientific andn, operated by NBS, supplies>n related to Government-gen-technology in defense, space,other national programs. For
z Clearinghouse services, write:
'housepartment of Commerce
. Ild, Virginia 22151
forei ailing.
C
U.S. DEPARTMENT OF COMMERCEWASHINGTON, D.C. 20230
OFFICIAL BUSINESS POSTAGE AND FEES PAID
U.S. DEPARTMENT OF COMMERCE
