A 11 ID 2 14^072

NSRDS-NBS 3, Section 1

Selected Tables of Atomic Spectra

Atomic Energy Levels and Multiplet Tables

Si ii, Si in, Si iv

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
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UNITED STATES DEPARTMENT OF COMMERCE • John T. Connor, Secretary

NATIONAL BUREAU OF STANDARDS • A. V. Astin, Director

Selected Tables of Atomic Spectra

A Atomic Energy Levels - Second Edition

B Multiplet Tables

Si ii, Si hi, Si iv

Data Derived From the Analyses of Optical Spectra

Charlotte E. Moore

NSRDS

NSRDS-NBS 3, Section 1

1 National Standard Reference Data SeriesNational Bureau of Standards 3

Category 3 —Atomic and Molecular Properties

Issued June 25, 1965

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C., 20402 - Price 35 cents
mmm bureau of

* V/

/fb

Cf

Library of Congress Catalog Card No. : 64-60074
Foreword

The present publication has been undertaken in response to the increasing demand for a current revision of two sets of tables containing data on atomic spectra as derived from

analyses of optical spectra.

The first set, Atomic Energy Levels, NBS Circular 467, consists of three Volumes published,

respectively, in 1949, 1952, and 1958, and a fourth on rare-earth spectra, still in course of

preparation.

The second set consists of two Multiplet Tables; one published in 1945 by the Princeton

University Observatory, containing spectral lines in the region of wavelengths longer than 3000 A

the other An Ultraviolet Multiplet Table, NBS Circular 488, appearing in five Sections, the

first in 1950, the second in 1952, and the others in 1962.

In order to make data available sooner for such rapidly developing fields as space technology, plasma physics, and astrophysics, two innovations have been introduced in the present

work. First, for each spectrum both the atomic energy levels and the multiplet table are being included in a single publication, as Parts A and B, respectively. Secondly, the Sections

will be published at irregular intervals whenever adequate data become available for the

individual spectra. In the earlier publications, the data were presented in regular order,

i.e., the spectra were arranged in order of increasing atomic number of the various elements.

This plan introduced long delays, as is evident from the span of years quoted above. The

present plan should reduce such delays. A flexible paging system will permit the arrangement of the various Sections by atomic number regardless of the order in which they are published. Section 1 starts the plan with three spectra of silicon, Z=14: Si n, Si m, Si iv. The

form of presentation is similar to that of the tables mentioned above.

The manuscript has been prepared by Charlotte E. Moore of the Atomic Physics Division,

who also prepared the earlier tables. She acknowledges with gratitude the cordial cooperation

of the National Research Council Committee on Line Spectra of the Elements, as well as that

of the many atomic spectroscopists who make such a publication possible. It is hoped that as the present and succeeding Sections appear, they will inspire further urgently needed research

on the analysis of atomic spectra.

A. V. Astin, Director.

Washington, D.C., June 1, 1965.

iii
.

.
Contents

Page

Foreword in

1 . Introduction vi

2. Arrangement vi

Part A vi

Part B vi

3. Acknowledgments vn

Part A—Atomic Energy Levels

Element: Z Spectrum

Silicon: 14

Si ii Al4 ii—

Si hi Al4 in—

Si iv Al4 iv

Part B—Multiplet Tables

Element: Z Spectrum

Silicon: 14

Si ii B14 ii

Si hi B14iii-1

Si iv B14 iv-1

v
1. Introduction

The increasing demand for data derived from the

analyses of optical spectra has prompted the planning of a

large publication. The present Section is the first of a long series to be published at irregular intervals, as suitable material becomes available. It is felt that the

inclusion of both revised “Atomic Energy Levels” and

“Selected Multiplets” as Parts A and B, respectively, of

the same Volume may meet the present need more

satisfactorily than the separate handling of each Part.

Furthermore, a flexible plan of publication permits the

preparation and distribution of the Tables whenever the

analysis of a spectrum has reached the stage where no

further revision or extension is likely to occur in the

foreseeable future.

It is hoped that the complete revision of “Atomic

Energy Levels” [1] (Part A) will contain many new results

for high-ionization spectra of the light and abundant

elements. This can be done only if the revision is carried on gradually, parallel with the development of laboratory

programs on the analyses of ultraviolet spectra.

2. Arrangement

Part A. For the “Atomic Energy Levels” the format is the same as that adopted for the first edition [1] . Recently,

however, the conversion factor from cm-1

to eV has been

revised [2]. The new factor has been adopted here. All

limits and energy levels (in cm-1

) have been multiplied

by the factor 0.000123981 to obtain the respective ionization and excitation potentials in eV quoted in the Tables.

The letters following the references are also the same as those used previously to denote the scope of the individual

papers. They are as follows:

I P Ionization potential

T Terms

C L Classified lines

G D Grotrian diagram

E D Energy diagram

Z E Zeeman effect

I S Isotope shift

hfs Hyperfine structure

Predicted positions of unknown levels are entered in

brackets.

Part B. A single Multiplet Table covering the observations over the entire spectral range for the various spectra,

has long been urgently needed. Theo writer’s Multiplet

Table of 1945 [3] includes lines >3000 A ; it is seriously out

of date and very incomplete as regards infrared data. Her

Ultraviolet Multiplet Table [4] is also inadequate for the

interpretation of existing ultraviolet solar spectra, and

should be greatly expanded in anticipation of future space

observations short of 3000 A. In the present work it is planned to combine these two Multiplet Tables into one

that is both revised and extended.

The general style of presentation is that of the “Ultraviolet Multiplet Table” [3], As explained above, all ionization and excitation potentials have been calculated

with the revised conversion factor recently recommended [2]

.

An arbitrary general grading of the analysis is indicated,

as in the earlier tables. The four grades denote respectively :

Anal A Analysis essentially complete.

Anal B Analysis good but not complete.

Anal C Leading lines classified.

Anal D Only a few leading lines classified.

A similar grading system has been used to indicate the

completeness of the Multiplet Table for a given spectrum.

For spectra of the abundant elements, widely used, essentially all classified lines are listed. When multiplet data

appear to be needed for only the leading lines of a spectrum, the listing is less complete. In general terms the

lists may be described as follows

:

List A All classified lines included in the Multiplet

Table.

List B Most classified lines included, but fainter

lines omitted.

List C Only leading classified lines listed.

List D Only strongest lines from ground states

listed.

The columns of the Multiplet Table are self-explanatory.

In column 1, the wavelengths in air are quoted for the

region long of 2000 A. Short of 2000 A, vacuum wavelengths are quoted. “Vac” and “Air” are inserted in this

column to remind the users of the change in the different

spectral regions. In column 2 the reference source for the

wavelength (and often for other data) is indicated by

letters that refer to the separate references used for the

tabulation. The references precede the multiplets. The

letters following the references have the same meaning as described for Part A. In the Multiplet Table, however,

the letter “I” is added to denote the reference source used

for the quoted estimated intensity. When the intensity

scale changes, either because of a different source, or a

different author, parentheses are used in the intensity

column.

VI
The low and high excitation potentials (columns 4 and

5), and the J values (column 6) correspond respectively, to the low and high levels involved in the transition producing the line. The levels in cm-1 may be found in Part A.

The term designations are identical in Parts A and B.

Symbols: An asterisk denotes a blend throughout. In

the wavelength column the lines so marked have more than

one classification in the same spectrum. In the intensity

column the asterisk indicates that the intensity is affected

by that of a neighboring line or of an impurity line.

If the blend involves a line in the spectrum of a different

stage of ionization of the same element, an asterisk precedes the wavelength and another symbol such as “§”

follows it. These symbols are explained on the first page

of the Table, following the references.

The raie ultime is indicated by the symbol

A dagger “f” in the intensity column calls attention to

intersystem combinations of astrophysical interest.

Throughout the Multiplet Table, intersystem combinations are handled as permitted lines, since they are so commonly observed in the laboratory. I. S. Bowen has

pointed out that under special conditions such as pertain

in nebulae, for example, certain intersystem combinations

from the ground state are stronger than lines from transitions in which the multiplicity does not change. The

relative laboratory intensities can, therefore, be misleading

under these special circumstances. A dagger denotes such

intersystem lines.

An “m” preceding the wavelength indicates that the line

is masked, and the spectrum of the masking line is indicated

in the intensity column.

Multiplet Numbers: The earlier multiplet numbers

from both the 1945 Table and the Ultraviolet Multiplet

Table are widely quoted in the literature. For this reason

the writer has been urgently requested to keep the old

numbers throughout. This involves retaining two systems

o of numbering; UV numbers for multiplets short of 3000 A;

o and regular numbers for those longer than 3000 A. The

old numbers have been dropped entirely in cases where the

earlier designations are incorrect. As before, “F” following the multiplet number denotes a forbidden transition.

Newly inserted multiplets are numbered by a decimal

system. For example, in Sin nine groups have been

inserted between multiplets formerly published as UV 6

and UV 7. The new ones are numbered UV 6.01, UV 6.02

etc. Similarly in the longer wave region a number of

multiplets have been inserted between multiplets 7 and 8

in the 1945 table. The new ones are numbered 7.01,

7.02 etc. When the old multiplet numbers are exhausted

and new ones follow, the decimal system is no longer used.

It is stated on the first page where the new multiplet

numbers, not inserted between older ones, start. In

Si ii, for example, the numbers from UV 21 and 10 for the

two respective regions have never been used before.

3. Acknowledgments

Many have assisted in planning this large publication.

At the Mt. Wilson and Palomar Observatories, the

Director, Ira S. Bowen and the late Paul W. Merrill have

taken a keen interest in the project and provided much

valuable help with the planning. The writer has also

benefited greatly from a conference with B. Stromgren,

who has carefully appraised this first Section before publication. Many others have also been consulted.

The cordial support of the National Bureau of Standards is making this program possible. Miss Sarah A.

Jones and her staff in the library are indispensable for such

a task. Nor could it succeed without the able assistance

from the Publications Section, where Mr. John Carpenter

and Mrs. Betty Arnold have spared no effort in handling

the publication of this difficult material in its present

legible style.

In the Spectroscopy group the support of K. G. Kessler,

W. F. Meggers, and W. C. Martin, Jr. has been a source

of great encouragement. Mrs. Isabel D. Murray is carrying the heavy load of preparing the final manuscript for the

press. All users are indebted to her for her extreme skill

and competence with these many details.

The writer takes genuine pleasure in thanking everyone

who has so willingly encouraged and helped her start

this enormous task. It is hoped that within the next

decade there will be increased activity in the observation

and analyses of atomic spectra, sufficient to fill some of the

most striking gaps in our knowledge of atomic spectra.

REFERENCES

[1] C. E. Moore, Atomic Energy Levels, Circ. Nat. Bur. Std. 467:

Volume I. H to V 206 spectra, 309 p. (1949);

Volume II. Cr to Nb 152 spectra, 227 p. (1952);

Volume III. {iLf

3 ^ Ac} 124 spectra, 245 p. (1958).

[2] J. A. Bearden and others, New Values for the Physical Constants

as Recommended by the NAS-NRC, Physics Today 17 , 48-49 (1964).

[3] C. E. Moore, A Multiplet Table of Astrophysical Interest, Contr. Princeton Univ. Obs. No. 20 (1945). Reprinted as Tech.

Note Nat. Bur. Std. No. 36, PB151395 (1959).

[4] C. E. Moore,

Std. 488:

Section 1. Section 2.

Section 3.

An Ultraviolet Multiplet Table, Circ. Nat. Bur. H to V

Cr to Nb

[ Mo to La

! TT f t.r» Rfi

78 p. (1950)

115 p. (1952);

94 p. (1962);

Section 4. Section 5. Finding Lists for Sections 1, 2, and 3 (1962).

VII
’
NSRDS-NBS 3, SECTION 1

SILICON, Z = 14

A Si ii Atomic Energy Levels

B Si ii Multiplet Table

Part A

Atomic Energy Levels

SILICON

Si II

(Al i sequence; 13 electrons) Z= 14

Ground state Is 2 2s2 2p

6 3s

2 3p2 Pox

3p

2 Po^ 131838.4 ±0.1 cm" 1

, 758.50 A (Vac) I P 16.35 eV

o o Shenstone has reobserved the Si n spectrum from 700 A to 9500 A and added 300 new lines

to the earlier description. His revised and extended analysis "includes details of the perturbations of the 3s2 nx 2X series up to x=g”. The limit is derived from a six-member 2 G series by

means of a Ritz formula. Autoionization effects are also discussed.

Intersystem combinations connect the terms of different multiplicity.

All data in the table are taken from Shenstone’s 1961 paper.

REFERENCE

A. G. Shenstone, Proc. Roy. Soc. [A] 261, 153 to 174 (1961). I P, T, C L

Si II Si II

Config. Desig. J Level Interval Config. Desig. J Level Interval

3s 2 (

1 S)3p 3P

2 p° o>4 0. 00

287. 32 3s 2

(

1 S)6p 6p2 p

0 oy2 113962. 34 14. 64

IX 287. 32 iX 113976. 98

3s 3 p

2 3p2 4 p oy2 1/2 42824. 35

42932. 68 108. 33

175. 29

3s 2

(

1 S)5fif $9 2 G 3/2

4>4 }

114177. 4

2 p2 43107. 97

3s 3jo( 3P°)3d 3 d' 4 p° 1/4 114265. 70 61 51

3s 3p

2 3p

2 2 D 1)4 55309. 61

15. 83 2>4 114327. 21 87 43

2/2 55325. 44 3>4 4>4 114414. 64

114529. 20

114. 56

3s 2 (‘S)4s 4s 2 S 0)4 65500. 73

3s 3p(3 P°)4s 4s' 4 p° 0/2 116862. 44 116 00

3s 3p

2 3 p

2 2 S 0/2 76665. 61 1/4 2>4 116978. 44

117178. 12

199. 68

3s 2

(

1 S)3d 3d 2 D 1/2 79338. 76

16. 52

2)4 79355. 28 3s 2 (

1 S)7s 7s 2 S 0H 117915. 06

3s 2 (

1 S)4p 4p

2 po oy2 81191. 60

59. 98

3s 2 (

1 S) 6d 6d 2 D 1/2 118523. 12

0. 07

1)4 81251. 58 2J4 118523. 19

3s 3p2 3p

2 2 P 0>4 83802. 21

202. 31

3s 2 (‘S)7p 7 P

2 p° 0>4 119245. 48 28. 59

1/2 84004. 52 1/2 119274 07

3s 2

(

1 S) 5s 5s 2 S oy2 97972. 35 3s 2 (

1 S)6/ 6/ 2 p° 3 14 2>4 119311. 45

119311. 60

-0. 15

3s 2 (

1 S)4d 4d 2 D ix 101023. 31

1. 30 2>4 101024. 61 3s 2

(

1 S)6g 6g

2 G 3>4

414 }

119578. 49

3* 2 0S)4

/

4/ 2 p° 3>4 2/2

103556. 29

103556. 42

-0. 13

3s 3p(3 P°)4s 4s' 2 p° 014 121444- 88 146 07

1/4 121590. 45

3s 2 (

1 S)5p 5 p

2po

0>4 103861. 00

24. 51 IX 103885. 51 3s 2

(

1 S)8s 8s 2 S 014 121814. 64

3s 3p( 3 P °)3d 3 d' 2 D° IX 108779. 0

41. 9

3s 2 (’S)7(i Id 2 D 1 X 122163. 74

0. 06

2% 108820. 9 214 122163. 80

3s 2 ('S) 6s 6s 2 S 0>4 111184. 72 3s 2 (

1 S)7/ V

zpo 314

214 122655. 51

122655. 63

-0. 12

3s 2

(

1 S)5d 5d 2 D IX 112394. 82

0. 16

2 >4 112394. 98 3 s

2 (‘S) 7(7 7 g2 G 314 414 }

122835. 39

3s*(>S)5f 5

2 p

0 3>4 113760. 41 -0. 17

2>4 113760. 58 3p IX 3 3p

3 <S° 123033. 6

A14 n-1
Si II

Continued

Atomic Energy Levels

Si II

Continued

Config. Desig. J Level Interval

3s 2 ('S)8p 8P

2p 0 oy2 1/2 123097. 89

123138. 93 41. 06

3s 2 ('S)9s 9s 2 S oy2 124277. 0

3s 3p(3 P°)3d 3d' 4D° oy2 i/

2/2 3/

124825. 4. 124317. 0

124449. 6

-12. 0

-8. 4

132. 6

3s 2 ('S) 8d 8d 2 D 1 /

2 /

1 124496. 0

3s 3p(3 P°)3d 3 d' 4 po 2y2 1 /

0)4

124567. 5

124615. 7

124639. 0

-48. 2 -23. 3

3s 2 OS) 8/ 8/ 2p° 3)4

2/2

124822. 34

124822. 40 -0. 06

3s 2

(

1 S)8^ 8g

2 G 3)4

4/2 }

124948. 66

3s 2 ('S)9p 9p 2p° 0/2

1)4

125025. 2

125034. 0

8. 8

3s 3p(3 P°)3d 3d' 2p° 1/

0)4

126236. 7 126279. 3 -42. 6

3s 2

(

! S) 9/ 9/ 2p° 2/

3)4 1 126305. 08

3s 2 0S)9<7 99

2 G

3)

4

4)

4 }

126396. 73

3s 2 0S) lOp lOp 2p ° 1/

0/

126526. 1 126545. 7 -19. 6

3s2 0S) 10/ 10/ 2p° 2)4

3/2 }

127363. 76

3s 2

(

1 S) 10<7 10g

2 G 3/

4)4 }

127432. 28

3s2 0S) 11/ 11/ 2p° 2/

3)4 }

128145. 61

3s2 0S) llg ii g

2 G 3/

4/ }

128198. 2

3s 3p(3 P°)3d 3d' 2p° 2/

3)4

131677. 4

131919. 1 241. 7

3s 3p(3 P°)4p 4p' 4 D 0/

1/

2/

3/2

131785. 0

131861. 99

131988. 11 132162. 35

76. 99

126. 12

174. 24

Si in (3s 2 'So)

3s 3p( 3 P°)4p

Limit 131838. 4

4p' 2 P O/2 1/

132592. 4

132676. 5

84. 1

3s 3p(3 P°)4p 4p' 4 P 0)4

1/

2/

134016. 96

134079. 06

134213. 69

62. 10

134. 63

3s 3p(3 P°)4p 4p' 4 S 1/ 134905. 34

3p3 3p 3 2D° 2/

1/

135298. 1 135304. 2 -6. 1

3s 3p(3 P°)4p 4p' 2 D 1 H

2 y2 140580

140773 193

3p3 3p3 2po

1 /

oy2 148982. 9

144004. 3 -21. 4

Config. Desig. J Level Interval

3s 3p(3 P°)4d 4d' 2 D° iy2 149871. 5

56. 8 2 / 149928. 3

3s 3p(3 P°)5s 5s' 4 P° oy2 150321. 9

120. 7

215. 0 in

2/2

150442. 6

150657. 6

3s 3p(3 P°)4d 4d' 4 F° 1/ 151077. 6 64 6

97. 8

137. 9

2/ 151142. 2

3)4

4/

151240. 0

151377. 9

3s 3p(3 P°)5s 5s' 2 P° 0/

1/ 151949. 7

3s 3p( 3 P°)4d 4d' 4 D° 0/ 152418. 2

13. 5

29. 2 74 7 1/ 152431. 7 2/ 152460. 9

3 / 152535. 6

3s 3p( 3 P°)4p 4p' 2 S oy2 152977. 0?

3s 3p( 3 P°)4d 4d' 4 P° 2/ 153093. 7 -90. 7 -49. 0

1 / 153184- 4

0/ 153233. 4

3s 3p(3P°)4d 4

d' 2 P° 0/ 153494. 4 43. 1 1 / 153537. 5

3s 3p(3 P°)4/ 4/' 2 F 2/2 155571. 9

38. 2 3/2 155610. 1

3s 3p(3 P°)4/ 4/' 4 F 1/ 155623. 3

10. 4

32. 4

29. 1

2/ 155633. 7

3 / 155666. 1 4/ 155695. 2

3s 3p(3 P°)4/ 4/' 4 G 2/ 156676. 3 134 9 0. 0

144 5

3 / 156811. 2 4/ 156811. 2

5/ 156955. 7

3s 3p( 3 P°)4/ 4/' 2 G 3 / 156683. 2

280. 2 4/ 156963. 4

3s 3p( 3 P°)4/ 4/' 2 D 1 / 157186. 9?

4. 8

2/ 157191. 7?

3s 3p(3 P°)4/ 4/' 4 D 3 / 157310. 9 - 100. 5 -49. 9

-22. 7

2/

1 /

157411. 4

157461. 3

0)4 157484. 0

3s 3p(3 P°)5d 5 d' 4 F° 1/

2)2

3)4

4)4 163907. 6?

3s 3p(3 P°)6s 6s' 4 P° 0/

1/

2/ 164111. 0?

3s 3p( 3 P°)5d 5d' 4 D° 0/

1/

2/

3/ 164844- 0?

3s 3p

(

3 P°)5d 5 d' 4 P° 0)4

1/

2)4 164966. O?

Si hi 3s 3 p

3 P2° Limit 184953. 0

March 1964.

A14 u-2
go

<X> HQ

<1

tc§

03H

EhGH>«H

to

CP O

02

03sM

03 Ha3

03>

.GO

.2

.a «o+* »•

Ch <M

bC oo <G <M GcO co O ^

S'

O

Al 02 ^a T—

| a HO oo•O' GO > Jj_ tjh’ -a1 ' OP< fe Ph

Tt< GO ^ GO Ala Q- Tp-a?

rH

a ah QQt}< GO o o fo pH

HT GO ^as no eo

COo o CO Q QQ

Al

go -a- GO s as as as 00 no> as 1 1 - a co co co O O PhPh

** GO as as

no rf co co QQO' GO "Sa,

Ph **

Al

a. a.

a

O aP tH

a.

t-H

a

a. eo

a, eo

P'P-,

GO £• a- eo eo

a

eo

Ph

a. eo

rfH Ala

co

m

m GO rj< GO

GO GO co a a 03

co co l v- -VmxnGO a.'a ^4?

PhPh

rr GO

Tfi th"

Ps COm

"am oPh

'al

GO CO CO GO co

co co

A co CO CO CO CO CO CO A14 ii-3

Multiplet Table

Part B SILICON

Si II (Z=14)

I P 16.35 eV Limit 131838.4L0.1 cm" 1 758.50 A (Vac)

Anal A List A February 1964

REFERENCES

A A. G. Shenstone, Proc. Roy. Soc. [A] 261 , 153 to 174 (1961). I P, T, C L, I; W L 711 A to 9412 A

P Predicted wavelength.

New Multiplet Numbers, not inserted between older ones, start with UV 21 and 10.

Si II Si II

I A. Ref Int

E P

J

Multiplet

No. I A Ref Int

E P

J

Multiplet

No.

Low High Low High

Air Vac

2334.606 A 30 0. 04 5. 34 IH—2H 3p

2 P° —3

p

2 4 P 711.83 A \h 0. 04 17. 45 iH—2H 3p 2 P° —4p 2 D

2344.203 A 10 0. 04 5. 32 1H—lH UV 0.01 711.34 A Oh 0. 00 17. 43 OH—iH UV 6.09

2334.404 A 30 0. 00 5. 31 OH—0/2 2350.174 A 20 0. 04 5. 31 lH—OH

Vac 1350.057 A 150 5. 34 14 53 2H—2H 3p2 4 P —4s' 4 P°

1816.921 A 200 0. 04 6. 86 1H—2H 3p

2P° —3p2 2 D 1350.520 A 20 5. 32 14 50 iH—iH UV 7 1808.003 A 150 0. 00 6. 86 oH—1 H2 UV 1 1350.658 A 20 5. 31 14. 49 OH—OH

1817.445 A 10 0. 04 6. 86 1H—1H 1353.718 A 100 5. 34 14 50 2H—1H

1352.635 A 100 5. 32 14 49 iH—OH

1533.4451 A 1000 0. 04 8. 12 1H—0H 3p

2 P° —4s 2 S 1346.873 A 100 5. 32 14. 53 1H—2H

1526.719 A 500 0. 00 8. 12 OH—0H UV 2 1348.543 A 100 5. 31 14 50 OH—iH

1309.274 A 200 0. 04 9. 51 iH—0H 3 p

2 P° —3p 2 2 S 1251.164 A 200 5. 34 15. 25 2H—iH 3p24 P —3p34S°

1304.369 A 100 0. 00 9. 51 oh—0H UV 3 1248.426 A 150 5. 32 15. 25 IH—iH UV 8

1246.738 A 100 5. 31 15. 25 OH—iH

1264.730 A 2000 0. 04 9. 84 iH—2H 3 p

2P° —3d2 D

1260.418 A 1000 0. 00 9. 84 OH—iH UV 4 1229.388 A 200 5. 34 15. 43 2H—3H 3p24 P —3d' 4 D°

1265.023 A 200 0. 04 9. 84 V/2—V/2 1228.746 A 150 5. 32 15. 41 IH—2H UV 8.01

1226.986 A 40 5. 31 15. 41 OH—IH

1194.496 A 250 0. 04 10. 41 iH—1 H2 3p

2P° —3p2 2 P 1231.406 A 5 5. 34 15. 41 2H—2H

1193.284 A 200 0. 00 10. 39 OH—OH UV 5 1228.617 A 25 5. 32 15. 41 IH—IH

1197.389 A 100 0. 04 10. 39 iH—OH 1226.814 A 50 5. 31 15. 42 OH—OH

1190.418 A 100 0. 00 10. 41 0H—iH 1228.437 A 10 5. 32 15. 42 iH—OH

1023.693 A 50 0. 04 12. 15 iH—0H 3p 2 P° —5s 2S 1227.604 A 100 5. 34 15. 44 2H—2H 3pI4 P —3d' *P°

1020.699 A 25 0. 00 12. 15 0H—0H UV 5.01 1224.252 A 20 5. 32 15. 45 iH—iH UV 8.02

1222.288 A 0 5. 31 15. 45 oh—OH

992.675 A 200 0. 04 12. 53 iH—2H 3p

2P° —4d 2 D 1226.887 A 20 5. 34 15. 45 2H—1H

989.867 A 100 0. 00 12. 52 0H—IH UV 6 1223.907 A 20 5. 32 15. 45 iH—OH

1224.972 A 10 5. 32 15. 44 iH—2H

901.735 A 20 0. 04 13. 78 iH—OH 3p

2 P° —6s 2 S 1222.635 A 5 5. 31 15. 45 OH—iH

899.405 A 10 0. 00 13. 78 OH—OH UV 6.01 929.810 A 20 5. 34 18. 68 2H—2H 3p24 P —5s' 4 P°

891.999 A 200 0. 04 13. 93 iH—2H 3p

2P° —5d 2 D 930.242 A 0 5. 31 18. 64 OH—OH UV 8.03

889.722 A 100 0. 00 13. 93 OH—iH UV 6.02 931.667 A 5 5. 34 18. 65 2H—iH

931.200 A 5 5. 32 18. 64 iH—OH

850.142 A 10 0. 04 14. 62 iH—OH 3p

2 P° —7s 2 S 928.297 A 5 5. 32 18. 68 iH—2H

848.074 A 5 0. 00 14. 62 OH—OH UV 6.03 929.206 A 1 5. 31 18. 65 OH—iH

845.774 A 40h 0. 04 14. 69 iH—2H 3 p

2 P° —6d 2 D 913.853 A 20 5. 34 18. 91 2H—3H 3p24 P —4d' 4 D°

843.718 A 20h 0. 00 14. 69 OH—iH UV 6.04 913.012 A 10 5. 32 18. 90 iH—2H UV 8.04

912.375 A 5 5. 31 18. 90 OH—iH

822.844 A 5h 0. 04 15. 10 iH—OH 3p

2 P° —8s 2 S 914.476 A 2 5. 34 18. 90 2H—2H

820.918 A 3h 0. 00 15. 10 OH—oh UV 6.05 913.264 A 3 5. 32 18. 90 iH—iH

912.459 A 5 5. 31 18. 90 OH—OH

820.516 A 20h 0. 04 15. 15 iH—2H 3 p

2 P° —7d 2 D

818.590 A 2h 0. 00 15. 15 OH—iH UV 6.06 909.209 A 3 5. 34 18. 98 2H—2H 3p24 P —4d' 4 P°

907.033 A 0 5. 32 18. 99 iH—IH UV 8.05

805.101 A 10h 0. 04 15. 44 iH— 3p

2P° —8d 2 D 905.71 A 0 5. 31 19. 00 OH—OH

803.234 A 3h 0. 00 15. 44 OH—iH UV 6.07 908.461 A 1 5. 34 18. 99 2H—IH

906.586 A 1 5. 32 19. 00 iH—OH

755.362 A 2 0. 04 16. 45 iH—iH 3p 2 P° —4p 2 P 907.762 A 0 5. 32 18. 98 iH—2H

UV 6.08 906.126 A 0 5. 31 18. 99 OH—lH

B14 n-1
Si II—Continued

Multiplet Table

Si II—Continued

E P E P

Multiplet Multiplet

I A Ref Int Low High

J No. I A Ref Int Low High

J No.

Vac Vac

826.42 A 1 ft 5. 34 20. 35 2JS—2K 3p 2 4 P —6s' 4 P°? 1127.907 A 40ft 6. 86 17. 85 2K—IK 3p

2 2 D —3p3 2 P°

UV 8. 06 1127.442 A 20ft 6. 86 17. 85 IK—OK UV 13.06

821.450 A 2ft 5. 34 20. 44 2'A—3K 3p2 4 P —5d' 4 D°? 1057.050 A 30 6. 86 18. 59 2K—2K 3p2 2D —4d' 2 D°

UV 8. 07 1057.503 A 15 6. 86 18. 58 IK—IK UV 13.07

1057.690 A 2 6. 86 18. 58 2K—IK

820.63 A 3 ft 5. 34 20. 45 2%—2% 3p 24 P —5d' 4 P°? 1056.899 A 2 6. 86 18. 59 IK—2K

819.49 A Oft 5. 32 20. 45 ik—2/2 ? UV 8. 08

1034.967 A 0? 6. 86 18. 84 3p2 2D —5s' 2p°? 2K—IK UV 13.08

Air

3856.017 A 500h 6. 86 10. 07 2V2—1 V2 3 p

2 2 D —4p2 P° Air

3862.595 A 200h 6. 86 10. 07 ik

oy2 1 6347.103 A 1000 8. 12 10. 07 ok—IK 4s 2 S —4p 2 P°

3853.664 A 100ft 6. 86 10. 07 iK—iK 6371.359 A 1000 8. 12 10. 07 OK—OK 2

2072.701 A 200 6. 86 12. 84 2^—3k 3p22D —4/ 2 F° 2604.422 A (2) 8. 12 12. 88 OK—iK 4s 2 S —5p

2 P°

2072.016 A 200 6. 86 12. 84 iK—2K UV 9 2606.084 A (1) 8. 12 12. 88 OK—OK UV 15

2058.646 A 50

50

6. 86 12. 88 2

xa—ik

iK—ok

3 p

2 2 D —5p2 P°

2059.014 A 6. 86 12. 88 UV 9.01 2057.965 A (2) 6. 86 12. 88 1 /2—ik 2346.234 A OH 9. 51 14. 79 OK—IK 3p2 2 S —7p

2 P°

UV 15.01 Vac

1869.317 A 20 6. 86 13. 49 2K—2K 3 p

2 2 D —3d 2 D° 2225.267 A (1) 9. 51 15. 07 OK—iK 3p2 2 S —4s' 2 P°

1870.227 A 15 6. 86 13. 49 lK—IK UV 9.02 UV 15.02

1870.782 A 3 6. 86 13. 49 2K—IK

1868.765 A 1 6. 86 13. 49 IK—2K 2016.654 A 3 ft 9. 51 15. -65 OK—iK 3p2 2 S —3d' 2 P°

2014.92 A Oft 9. 51 15. 66 ok—OK UV 15.03

1711.296 A 20h 6. 86 14. 10 2K—3K 3p22 D —5/ 2 F°

1710.826 A 10h 6. 86 14. 10 IK—2K UV 10 Vac

1485.513 A lOOftp 9. 51 17. 85 OK—IK 3 p

2 2 S —3p3 2 P°

1704.967 A 2h 6. 86 14. 13 IK—OK 3^2 2JJ (jp 2JJ U 1485.024 A 90ftp 9. 51 17. 85 OK—OK UV 15.04

UV 10.01

1563.765 A 10 6. 86 14. 79 2K—iK 3p

2 2 D —7p

2 P°

1564.066 A 5 6. 86 14. 78 IK—OK UV 10.02 Air

4130.893 A 500 H 9. 84 12. 84 2K—3K 3d 2 D —4/ 2 F°

1562.845 A 15 6. 86 14. 79 2K—3K 3 p

2 2 D —6/ 2 F° 4128.067 A 300 H 9. 84 12. 84 IK—2K 3

1562.451 A 10 6. 86 14. 79 iK—2K UV 11 4075.451 A 20 H 9. 84 12. 88 2K—IK 3d 2 D —5p

2 P°

1509.101 A 100h 6. 86 15. 07 2K—IK 3p22D —4s 2 P° 4076.781 A 15 H 9. 84 12. 88 iK—OK 3.01 1512.072 A 50h 6. 86 15. 06 IK—OK UV 11.01 4072.711 A 3 ft 9. 84 12. 88 iK—IK

1508.741 A 3h 6. 86 15. 07 IK—IK

2905.692 A 500 9. 84 14. 10 2K—3K 3d 2 D —5/ 2 F°

1485.224 A 30 6. 86 15. 21 2K—3K 3p22D —7f 2 F° 2904.283 A 300 9. 84 14. 10 IK—2K UV 17 1484.873 A 15 6. 86 15. 21 IK—2K UV 12

2887.511 A 10ft 9. 84 14. 13 2K—IK 3d 2 D —6p 2 P°

1476.928 A 1 6. 86 15. 25 2K—iK 3p2 2D —3

p

3 4 S° 2887.358 A 5ft 9. 84 14. 13 IK—OK UV 17.01 UV 12.01 2886.133 A (1) 9. 84 14, 13 IK—IK

1474.649 A 15ft 6. 86 15. 27 2K—IK 3p

2 2 D —Sp 2 P° 2851.456 A (2) 9. 84 14. 19 2K—3K 3d 2 D —3d' 4 F°

1475.188 A 5h 6. 86 15. 26 IK—OK UV 12.02 2857.231 A (1) 9. 84 14. 17 IK—2K UV 17.02

1474.304 A 1 h 6. 86 15. 27 iK—iK 2858.514 A (1) 9. 84 14. 17 2K—2K

1438.931 A 4h 6. 86 15. 48 2K—3K 3)

o

2 2 D —8/ 2 F° 2504.331 A 2ft 9. 84 14. 79 2K—IK 3d 2 D —Ip 2 P°

1438.576 A 2h 6. 86 15. 48 IK—2K UV 13 2505.091 A 2ft 9. 84 14. 78 IK—OK UV 17.03

1434.542 A 2h 6. 86 15. 50 2K—IK 3p

2 2 D —Op 2P° 2501.970 A 5ft 9. 84 14. 79 2K—3K 3d 2 D —6f 2 F°

1434.400 A 1 ft 6. 86 15. 50 IK—OK UV 13.01 2500.928 A 3ft 9. 84 14. 79 IK—2K UV 18

1410.219 A 20ft 6. 86 15. 65 2K—IK 3p

2 2 D —3d' 2 P° 2366.972 A 5ft 9. 84 15. 07 2K—IK 3d 2 D —4s' 2 P°

1409.073 A 10ft 6. 86 15. 66 IK—OK UV 13.02 2374.255 A 5ft 9. 84 15. 06 IK—OK UV 18.01 1409.90 A 2ft 6. 86 15. 65 IK—i'K 2366.053 A (5) 9. 84 15. 07 IK—IK

1404.478 A Oh 6. 86 15. 69 2K—iK 3p2 2 D —10p 2 P° 2307.863 A (2) 9. 84 15. 21 IK—2K 3d 2 D —7/ 2 F°

1403.783 A 5 ft 6. 86 15. 69 iK—OK UV 13.03 UV 18.02

1404.170

1305.590

A 1 ft 6. 86 15. 69 IK—iK

2283.266 A (3) 9. 84 15. 27 2K—IK 3d 2 D —8p 2 P°

A 50ft 6. 86 16. 36 2K—3K 3p

2 2 D —3d' 2 F° 2284.542 A (1) 9. 84 15. 26 IK—OK UV 18.03

1309.458 A 20ft 6. 86 16. 33 IK—2K UV 13.04

1309.77 A 2ft 6. 86 16. 33 2K—2K Vac

1902.459 A 100ft 9. 84 16. 36 2K—3K 3d 2 D —3d' 2 F°

1250.433 A 150 6. 86 16. 77 2K—2K 3p2 2 D —3p32 D° 1910.621 A 50ft 9. 84 16. 33 IK—2K UV 18.04

1250.089 A 100 6. 86 16. 78 IK—IK UV 13.05 1911.265 A Oft 9. 84 16. 33 2K—2K

B14 ii-2
Multiplet Table

Si II—Continued Si II

Continued

I A Ref Int

E P

J

Multiplet

No. I A Ref Int

E P

J

Multiplet

No.

Low High Low High

Vac Air

1787.538 A 8 9. 84 16. 77 2/—2/z 3d 2 D —3p32 D° 4232.864 A (10) 12. 15 15. 07 O/2—I/ 5s 2 S —4s' 2 P°

1786.817 A 4 9. 84 16. 78 1 /—1 / UV 18. 05 4259.202 A (5) 12. 15 15. 06 0/—0/ 7.01

1416.972 A lOh 9. 84 18. 59 2^4—2y2 3d 2 D —W 2 D°

1417.781 A 5 9. 84 18. 58 114—1/2 UV 18. 06

1418.110 A 0 9. 84 18. 58 2 /—1 / 7849.72 A (500) 12. 53 14. 10 2/—3/ 4c/ 2 D —5/ 2 F°

7848.80 A (400) 12. 52 14. 10 1/—2/ 7.02

5466.868 A 500H 12. 53 14 79 2/—3/ 4eZ 2 D —6/ 2 F°

Air 5466.432 A 500 H 12. 52 14. 79 1/—2/ 7.03

5978.929 A 500 10. 07 12. 15 1 /2—0/ 4p 2 P° —5s 2 S

5957.561 A 500 10. 07 12. 15 0/2—0/ 4 4861.095 A (10) 12. 53 15. 07 2%—1]4 4d 2 D —4s' 2 P°

4895.558 A Oh 12. 52 15. 06 10 V’ r-N. r-i 7.04

5055.981 A 1000 10. 07 12. 53 1 /—2 / 4p

2 P° —

d 2 D

5041.026 A 1000 10. 07 12. 52 0/2—1 / 5 4621.721 A (150) 12. 53 15. 21 2/—3/ 4d

2 D —7/ 2 F°

5056.314 A (30) 10. 07 12. 52 1 /—1 / 4621.418 A (100) 12. 52 15. 21 1/—2/ 7.05

3339.819 A 500 10. 07 13. 78 1 /2—0/ 4p

2P° —6s 2 S 4200.898 A (40) 12. 53 15. 48 2/—3/ 4c/ 2 D —8/ 2 F°

3333.139 A 300 10. 07 13. 78 0/—0/ 6 4200.657 A (30) 12. 52 15. 48 1/—2/ 7.06

3210.025 A 200 HH 10. 07 13. 93 1 /—2/ 4p

2 P° —5d 2 D 3954.507 A (10) 12. 53 15. 66 2/—3/ 4c/ 2 D —9/ 2 F°

3203.872 A 100HU 10. 07 13. 93 0/—1 / 7 3954.296 A (5) 12. 52 15. 66 1/—2/ 7.07

2726.702 A 5h 10. 07 14. 62 1 /—0/ 4p

2 P° —7s 2 S 3795.553 A (1) 12. 53 15. 79 2/—3/ 4c/ 2 D —10/ 2 F°

2722.250 A 2h 10. 07 14. 62 0/—0/ UV 19 3795.362 A (3) 12. 52 15. 79 1/—2/ 7.08

2682.210 A 10h 10. 07 14. 69 1 /—2/ 4p

2 P° —

d 2 D 3686.133 A (2) 12. 53 15. 89 2/—3/ 4c/ 2 D —11/ 2 F°

2677.906 A 3h 10. 07 14. 69 0/—1 / UV 20 3685.950 A (1) 12. 52 15. 89 1/—2/ 7.09

2439.953 A OH 10. 07 15. 15 0/—1 / 4p

2 P° —

d 2 D 3235.92 A (2 H) 12. 53 16. 36 2/—3/ 4c/ 2 D —3<Z' 2 F°

UV 21 7.10

2311.719 A (1) 10. 07 15. 44 1 /— 4p

2 P° —8d2 D Vac

UV 22 1904.326 A 5h 12. 53 19. 04 2/—1/ 4c/ 2 D —4cZ' 2 P°

1905.878 A 3 h 12. 52 19. 03 1/—0/ UV 31

Vac

1944.586 A 15 10. 07 16. 45 1 /—1 / 4p

2 P° —4p' 2 P

1945.504 A 3 10. 07 16. 44 0/—0/ UV 23

1947.769 A 1 10. 07 16. 44 1 /—0/ Air

9412.72 A 100 12. 84 14. 16 4/ 2 F° —5s 2 G

7.11

Air 6679.65 A (2) 12. 84 14. 69 4/ 2 F° —6cZ 2 D

2834.472 A 3h 10. 41 14. 79 1 /—1 / 3p2 2 P —7p

2 P° 7.12

2820.580 A 2h 10. 39 14. 78 0/2—0/ UV 24

2836.765 A (1) 10. 41 14. 78 1 /2—0/ 6239.630 A (100) 12. 84 14. 83 4/ 2 F° —6g 2 G

2818.302 A (2) 10. 39 14. 79 0/—1 / 7.13

2659.781 A 5h 10. 41 15. 07 1 /—1 / 3p

2 2 P —4s' 2 P° 5185.535 A (100) 12. 84 15. 23 4/ 2 F° —7g 2 G

2655.803 A 3h 10. 39 15. 06 0/—0/ UV 25 7.14

2670.153 A Oh 10. 41 15. 06 1 /—0/

2645.539 A Oh 10. 39 15. 07 0/—1 / 4673.273 A (20) 12. 84 15. 49 4/ 2 F° —8g 2 G

7 ic

2554.530 A (10) 10. 41 15. 27 1 /—1 / 3p2 2 P —8p

2 P°

2544.046 A (3) 10. 39 15. 26 0/—0/ UV 26 4376.957 A (5A) 12. 84 15. 67 4/ 2 F° —9g 2 G

2557.206 A (1) 10. 41 15. 26 1 /—0/ 7.16

2541.393 A (2) 10. 39 15. 27 0/—1 /

4187.137 A (5h) 12. 84 15. 80 4/ 2 F° —10o 2 G

Vac 7.17

1949.564 A 100 10. 41 16. 77 1 /—2/ 3p2 2 P —3p

3 2 D°

1941.667 A 50 10. 39 16. 78 0/2—1 / UV 27 4056.993 A (2/0 12. 84 15. 89 4/ 2 F° —llo 2 G

1949.331 A 10 10. 41 16. 78 1 /—1 / 7.18

1667.267 A 0 10. 41 17. 85 1 /—1 / 3p

2 2p _3p3 2p°

1661.059 A 3h 10. 39 17. 85 0 /—0/ UV 28

1661.633 A 1 h 10. 39 17. 85 0/—1 /

7125.84 A (4) 12. 88 14. 62 1 /—0/ bp 2 P° —7s 2 S

1516.910 A 60p 10. 41 18. 59 1 /—2/ 3p2 2 p _4d' 2 D

0 7113.45 A (2) 12. 88 14. 62 0/—0/ 7.19 1513.570 A 30p 10. 39 18. 58 0/—1 / UV 29

1518.221 A 5 p 10. 41 18. 58 1 /—1 / 6829.82 A (40) 12. 88 14. 69 1/—2/ bp 2 P° —6c/ 2 D

6818.45 A (20) 12. 88 14. 69 H 1rH O 7.20 1471.775 A 2 10. 41 18. 84 1 /—1 / 3p2 2 p —

S

' 2p°

UV 30 5575.973 A (5) 12. 88 15. 10 1/—0/ 5p 2 P° —Ss 2 S

5568.355 A (2) 12. 88 15. 10 0/—0/ 7.21

741-082 O—64 3 B14 n-3
Multiplet Table

Si II—Continued Si II—Continued

I A Ref Int

E P

J

Multiplet

No. I A Ref Int

E P

J

Multiplet

No.

Low High Low High

Air Air

5469.450 A (30) 12. 88 15. 15 ift—2/ 5p 2 P° —7d 2 D 2349.54 A 10H 14. 19 19. 46 3/—4/ 3d' 4 F° —4/' 2 G

5462.146 A ( 10 ) 12. 88 15. 15 oft—ift 7.22 2360.20 A 10H 14 17 19. 43 2/—3/ UV 36

2365.06 A 2ft 14 19 19. 43 3/—3/

4902.65 A (3ft) 12. 88 15. 41 i/—o/ 5p 2 P° —9s 2 S

7.23 2336.730 A 2ft 14 20 19. 50 4/—3/ 3d' 4 F° —4/' 4 D

2325.04 P 14 19 19. 52 3/—2/ UV 37

4850.550 A (5ft) 12. 88 15. 44 i z 2)4 5p 2 P° —8d 2 D 2317.64 P 14. 17 19. 52 2/—1 /

4844.82 A (2ft) 12. 88 15. 44 oy—iy 7.24 2313.100 A ( 0?) 14 17 19. 53 1 /—0/

3472 43 A 2ft 12 88 16. 45 1/—114 JP° Av

' 2P

3479^538 A 2 12. 88 16. 44 oft—oft 7.25

6671.88 A 100 14 53 16. 39 2/—3/ 4s' 4 P° —4p' 4 D

6660.52 A 50ft 14 50 16. 36 1 /2—2/ 7. 34

6665.00 A 15 14. 49 16. 35 0/—1 /

4190.724 A 100ft 13. 49 16. 45 2y—iy 3d' 2 D° —4p' 2 P 6750.28 A 20ft 14. 53 16. 36 2/—2/

4198.133 A 50 13. 49 16. 44 1 /2—0/ 7.26

‘ 6717.04 A 50ft 14 50 16. 35 1 /—1 /

4183.345 A 10ft 13. 49 16. 45 1 /2—1/2 6699.38 A 20 14 49 16. 34 0/—0/

6808.19 A 2ft 14. 53 16. 35 2 /—1 /

3128.77 A 1 13. 49 17. 45 2/2—2/ 3d' 2 D° —4p' 2 D 6751.88 A 5 14 50 16. 34 1 /—0/

7.27

5868.404 A 300ft 14. 53 16. 64 2/—2/ 4s' 4P° —4p' 4 P

2136.560 A 50ft 13. 49 19. 29 2 /—3/ 3d' 2 D° —4/' 2 F 5846.134 A 50 14. 50 16. 62 1 /

1 / 8

2136.402 A 30ft 13. 49 19. 29 1 /—2/ UV 32 5827.801 A 30 14. 49 16. 62 0 /—0/

5915.220 A 150 14 53 16. 62 2 /—1 /

2133.99 A 10ft 13. 49 19. 30 2 /—3/ 3d' 2 D°—4/' 4 F 5867.483 A 10 14. 50 16. 62 1ft—0/

UV 33 5800.468 A 150ft 14 50 16. 64 1 /—2/

5806.738 A 200 14. 49 16. 62 O/2—I/2 5639.478 A 200ft 14. 53 16. 73 2/2—1 / 4s' 4P° —4p' 4 S

8044.50 A (15) 13. 93 15. 48 5d 2 D —8/

2 F° 5576.661 A 150ft 14. 50 16. 73 I/2—I/ 9 7.28 5540.74 A 100ft 14. 49 16. 73 0/—1 /

7187.04 A ( 2 ) 13. 93 15. 66 5d 2 D —9/ 2 F°

7.29

7490.33 A ( 1 ) 14. 78 16. 44 0 10 7p

2 P° —4p’ 2 P7

10

7911.47 A ( 10ft) 14. 10 15. 67 5/ 2 F° —9g 2 G

7.30

3185.99 A ( 10ft) 15. 07 18. 97 1ft—0/ 4s' 2 P° —4p' 2 S

7312.29 A (3ft) 14. 10 15. 80 5/ 2 F° —10g 2 G 3170.40 A 1 ft 15. 06 18. 97 0/2—0/ 11 7.31

6924.53 A (OH) 14. 10 15. 89 5/ 2 F° —llg 2 G

7.32 3208.25 A ( 2 ) 15. 43 19. 29 3 /2—3 / 3d' 4 D° —4/' 2 F

3194.69 A 50 15. 41 19. 29 2 /2—3 / 12

3199.514 A 200 15. 43 19. 30 3/—4/ 3d' 4 D° —4/' 4F

5669.562 A 1000ft 14. 20 16. 39 4/—3/ 3d' 4 F° —4p' 4 D 3188.97 A 150 15. 41 19. 30 2/—3/ 13

5688.811 A 300ft 14 19 16. 36 3/—2/2 7. 33 3193.09 A 150 15. 41 19. 30 1ft—2/

5701.374 A 200ft 14 17 16. 35 2/—1/2 3195.41 A 100 15. 42 19. 29 0/—1/

5706.370 A 100ft 14. 17 16. 34 1/—

O

/2 3202.49 A 20 15. 43 19. 30 3/—3/

5632.973 A 100ft 14. 19 16. 39 3/—3/ 3192.25 A 50 15. 41 19. 30 2/—2/

5660.656 A 150ft 14. 17 16. 36 2/—2/ 3194.21 A 50 15. 41 19. 29 I/2—I/

5681.44 A 30ft 14 17 16. 35 iy—iy 3205.77 A (1) 15. 43 19. 30 3ft—2/

5605.351 A 3ft 14. 17 16. 39 2/2—3/

5641.01 A 2ft 14. 17 16. 36 1 /—2/ 3042.191 A 30ft 15. 43 19. 50 3/2—3/ 3d' 4 D° —4/' 4 D

3020.78 P 15. 41 19. 52 2/—2/ 14

2428.45 A 10ft 14. 20 19. 30 4/—4/ 3d' 4 F° —4/' 4F 3017.00 P 15. 41 19. 52 I/2—I/

2423.42 A 3ft 14. 19 19. 30 3 /2—3/ UV 34 3015.980 A (3) 15. 42 19. 53 O/2—O/

2420.19 A 3ft 14. 17 19. 30 2/2—2/ 3032.85 A 2H 15. 43 19. 52 3/2—2/

2417.20 A 2ft 14 17 19. 29 1 Z

1 / 3014.920 A (3) 15. 41 19. 53 I/2—O/2 2421.72 A 3ft 14 19 19. 30 3/2—4/ 3030.000 A 100ft 15. 41 19. 50 2/2—3/

2418.29 A 2ft 14. 17 19. 30 2/2—3/ 3021.55 A 20H 15. 41 19. 52 1ft—2ft 2416.60 A 1 ft 14. 17 19. 30 1 /2—2/ 3018.04 A 2 H 15. 42 19. 52 0/—1ft 2356.295 A 100H 14 20 19. 46 4/—5/ 3d' 4F° —4f' 4

G

2357.97 A 50H 14. 19 19. 44 3/—4/ UV 35

2353.09 A 20 H 14. 17 19. 44 2/—3/ 3220.44 A 10 15. 44 19. 29 2ft—3/ 3d' 4 P°—4/' 2 F

2357.18 A 30H 14. 17 19. 42 1/—2/ 15

2364.33 A 3ft 14 20 19. 44 4/—4/

2357.96 P Si ii 14 19 19. 44 3/—3/

2360.59 A I 5ft 14. 17 19. 42 2/—2/

B14 n-4
Si II—Continued

Multiplet Table

Si II—Continued

E P E P

Multiplet Multiplet

I A Ref Int J No. I A Ref Int J No.

Low High Low High

Air Air

3214.66 A 75 15. 44 19. 30 2)4—3K 3d' 4 P°—4/' 4 F 5794.90 A 30 H 16. 45 18. 59 iK—2K 4p' 2 P—4d' 2 D°

3223.01 A 20 15. 45 19. 30 IK—2/2 16 5785.73 A 30h 16. 44 18. 58 0K—IK 27

3217.99 A 15h 15. 44 19. 30 2)4—2)4 5813.99 A 1 H 16. 45 18. 58 iK—iK

3224.13 A 1 15. 45 19. 29 1)4—1)4

4792.29 A bh 16. 45 19. 04 IK—IK 4p' 2 P—4d' 2 P°

3053.184 A 150/i 15. 44 19. 50 2)4—3)4 3d' 4 P°—4

/' 4 D 4782.89 A 3h 16. 44 19. 03 OK—OK 28

3048.30 A 50H 15. 45 19. 52 1)4—2K 17 3045.77 A 10H 15. 45 19. 52 0)4—1)4

3043.85 A 10H 15. 44 19. 52 2)4—2)4

*3043.692 A 100hh 15. 45 19. 52 1)4—1)4 6080.06 A 20 H 16. 64 18. 68 2K—2K 4p' 4 P—5s' 4 P°

*3043.692 A 100hh 15. 45 19. 53 0)4—0)4 6019.76 A m 16. 62 18. 65 iK—iK 29

3039.21 A 3 H 15. 44 19. 52 2)4—1)4 6131.76 A 4 H 16. 62 18. 64 OK—OK

3041.573 A 20H 15. 45 19. 53 1)4—OK 6160.16 A 5 H 16. 64 18. 65 2K—iK

6155.17 A 5 H 16. 62 18. 64 iK—0K

6030.27 A 5 H 16. 62 18. 68 iK—2K

6086.67 A 10H 16. 62 18. 65 OK—iK

3125.26 A 1 15. 48 19. 44 —3)4 8/ 2 F°—4/' 4 G

3138.21 A (3) 15. 48 19. 42 —2)4? 18 5456.45 A 100H 16. 64 18. 91 2K—3K 4p' 4 P—4d' 4 D°

5438.62 A 100h 16. 62 18. 90 IK—2K 30

5428.92 A 15H 16. 62 18. 90 OK—IK

5478.73 A 5 H 16. 64 18. 90 2K—2K

4016.22 A 5HH 16. 36 19. 44 3)4—4)4 3d' 2 F°—4

/' 4 G 5447.26 A 20 H 16. 62 18. 90 IK—IK

3977.46 A 10HH 16. 33 19. 44 2)4—3)4 19 5432.89 A 15H 16. 62 18. 90 OK—OK

5451.18 A Oh 16. 62 18. 90 iK—OK

3991.77 A 15 HH 16. 36 19. 46 3K—4)4 3d' 2 F°—4

/' 2 G

3998.01 A 10 HH 16. 33 19. 43 2)4—3)4 20 5295.19 A 30h 16. 64 18. 98 2K—2K 4p' 4 P—4d' 4 P°

5232.76 A Oh 16. 62 18. 99 iK—iK 31

3955.74 A 10h 16. 36 19. 49 3)4—2)4 3d' 2 F°—4/' 2 D? 5269.74 A 3h 18. 64 18. 99 2K—iK

3919.00 A 5h 16. 33 19. 49 2)4—1)4 21 *5219.37 A 10h 16. 62 19. 00 iK—OK

5257.64 A 3 h 16. 62 18. 98 iK—2K

5215.67 A 1 h 16. 62 18. 99 OK—iK

5405.34 A 100h 16. 39 18. 68 3)4—2)4

2)4—1)4 4

p' 4 D—5s' 4 P°

5417.24 A 15H 16. 36 18. 65 22

5415.64 A 5H 16. 35 18. 64 IK—OK 5496.45 A 200h 16. 73 18. 98 iK—2K 4p' 4 S—4d' 4 P°

5354.89 A 5H 16. 36 18. 68 2)4—2)4 5469.21 A 100h 16. 73 18. 99 iK—IK 32

5380.48 A 5H 16. 35 18. 65 IK—iK 5454.49 A 15H 16. 73 19. 00 iK—OK

5393.18 A 3 H 16. 34 18. 64 0)4—0)4

*5202.413 A 500h 16. 39 18. 77 3)4—4K 4p' 4 D—4d' 4 F°

5192.86 A 200h 16. 36 18. 75 2)4—3)4 23 4932.80 A 20h 16. 78 19. 29 iK—2K 3p3 2 D°—4f' 2 F?

5185.25 A 100h 16. 35 18. 74 IK—2)4 33

5181.90 A 100 16. 34 18. 73 0)4—IK

5240.31 A 5h 16. 39 18. 75 3)4—3)4 4908.18 A bh 16. 77 19. 30 2K—3K 3p3 2 D°—4/' 4 F

*5219.37 A 10h 16. 36 18. 74 2)4—2)4 34

*5202.413 A 500h 16. 35 18. 73 1)4—IK

4906.99 A 20h 16. 39 18. 91 3)4—3)4 4p' 4 D—4d' 4 D° Unclassified Lines of Si n

4883.20 A 15h 16. 36 18. 90 2K—2)4 24

4860.16 P 16. 35 18. 90 1)4—1)4 4845.26 A 3h 16. 34 18. 90 0)4—0)4 Air Vac

4890.25 A Oh 16. 36 18. 90 2)4—1 K 6067.45 A 10HH 1237.36 A 3 H

4853.35 A 2h 16. 35 18. 90 IK—2)4 3461.642 A (2) 1235.920 A 10

4842.32 A 2h 16. 34 18. 90 OK—IK 3414.758 A (3) 1233.354 A bh

Vac 1216.117 A 10/i 4776.20 A 3h 16. 39 18. 98 3)4—2)4 4p' 4 D—4d' 4 P° 1311.265 A 2 1084.144 A 3

25 1275.662 A bh 1082.400 A 2 1274.300 A 3 h

3149.92 A (20) 16. 39 20. 32 3)4—4)4 4p' 4 D—

d' 4 F°?

26

B14 n-5

NSRDS-NBS 3, SECTION 1

SILICON, Z—li

A Si in Atomic Energy Levels

B Si III Multiplet Table

Part A

Atomic Energy Levels

SILICON

Si III (Mg i sequence; 12 electrons) Z=14

Ground state Is 2 2s2 2p

6 3s2 'Sq

3s2 % 270139. 3 ± 0.4 cm"1

, 370.179 A (Vac) I P 33.49 eV

The analysis is by Toresson, who has reobserved the spectrum from 400 A to 10000 A.

He has measured some 360 lines and added 107 energy levels to the earlier analysis.

Observed intersystem combinations connect the terms of different multiplicity. Three

levels not connected with the rest by observed transitions, are indicated by Predicted

positions of the 8d

3D1i2 levels and of the 3,1 K° and 3,1 L terms are entered in brackets in the

table.

The ionization limit has been well determined from the nA-series, by means of a Ritz

formula.

REFERENCE

Y. G. Toresson, Ark. Fys. (Stockholm) 18, No. 28, 389 to 416 (1960). I P, T, C L, G D

Si ill Si in

Config. Desig. J Level Interval Config. Desig. J Level Interval

3s* 3s2 >S 0 0. 00 3p(2P°)3d 3d' 1 D° 2 205029. 09

3s( 2S)3p 3p 3 P° 0 52724- 69 lOQ fiO 3s( 2 S)5s 5s 3 S 1 206176. 08

12

52853. 28

53115. 01

261. 73

3s( 2S)5s 5s iS 0 207874. 09

3s( 2 S)3

p

3p «P° 1 82884. 41 3s(2 S)4

/

4/ 3 F° 2 209531. 40 27 93

3 209559. 33

40! 37

3p2 3p2 ‘D 2 122214. 52 4 209599. 70

3p2 3p2 3 P 0 129708. 45 3s( 2 S)5p 5p

1 P° 1 214532. 17

12129841. 97

130100. 52 258. 55

3s( 2 S)5p 5p

3 P° 2 214989. 27 — 5 38

1 214994. 65 -0. 81

3s( 2S)3d 3d 3 D 3 142943. 74 -2. 10

-2. 41

0 214995. 46

2 142945. 84

1 142948. 25 3p(2 P°)3d 3d' 3 P° 2 216190. 24 — 98 45

1 216288. 69 -61. 57

3s( 2S)4s 4s 3S 1 153377. 05 0 216350. 26

3p» 3p21 S 0 153444. 23 3p(2P°)3d 3d' 3 D° 1 217385. 77

54. 15

3s( 2S)4s

2 217439. 92

49. 57

4s iS 0 159069. 61 3 217489. 49

3s( 2S)3

3d !D 2 165765. 00 3s( 2 S)5/ 5/ >F° 3 225526. 33

3s(2S)4p 4p 3 P° 0 175230. 01

33. 09

73. 16

3p(2 P°)4s 4s' 3 P° 0 226400. 00 127 42

1 175263. 10 1 226527. 42 292. 86

2 175336. 26 2 226820. 28

3s( 2 S)4p 4p 'P° 1 176487. 19 3s( 2 S)5d 5d 3 D 1 227081. 19 3 02

2 227084. 21 4 51

3p(2 P°)3d 3d' 3 F° 2 198923. 15

103. 34

137. 61

3 227088. 72

34

199026. 49

199164- 10 3s( 2 S) 5d 5d >D 2 227665. 09

3s(2S)4d 4d 3 D 1 201597. 73

0. 55

1. 20

3p(2P°)3d 3d' iP° 1 228699. 75

2 201598. 28

3 201599. 48 3s(2 S)6s 6s 3S 1 229623. 19

3s( 2S)4d 4d ID 2 204330. 79 3s( 2S)5/ 5f

3 F° 2 230267. 7

0 9

3 230268. 62

2. 04

3s(2S)4/ 1 4/ 1 F° 3 204828. 06 4 230270. 66

A14 m-1
Si ill—Continued

Atomic Energy Levels

Si III—Continued

Config. Desig. J Level Interval

3s( 2S)5gr 5^ 3 G 3 230301. 22 0 44

4 230301. 66

0. 69

5 230302. 35

3s(2 S)5<7 5g *G 4 230302. 01

3s(2 S)6s 6s »S 0 230364. 46

3s(2 S)6p 6 v

1 P° 1 284887. 64

3s( 2 S)6p 6 p

3 P° 0 234415. 07

13 33

1 234428. 40

13. 78

2 284442. 18

3p(2 P°)3d 3d' 1 F° 3 285418. 93

3p(2 P°)4s 4s'iP° 1 235951. 09

3s( 2 S)6d 6d 3 D 1 240262. 28 22 00

2 240284. 28

30. 35

3 240314. 63

3s( 2 S)6d 6 d

J D 2 240549. 77

3s( 2 S)7s 7s 3 S 1 242145. 10

3s( 2 S)6/ 6/ 3 F° 2 242410. 88 0 39

3 242411. 27

0. 43

4 242411. 70

3s( 2 S)6^ 6g

3 G 3 242473. 66

0. 20

0. 95 4 242473. 86

5 242474. 81

3s( 2 S)6<7 6g

1 G 4 242474. 27

3s( 2 S)7s 7s iS 0 242537. 95

3s( 2 S)6/i 6fc 31 H

0 242639. 38

3p(2 P°)4p 4p' iP 1 242885. 30

3s( 2 S)6/ 6/ iF 0 3 243868. 50

3p( 2 P°)4p 4

p' 3 D 1 244736. 93 1 OQ 19

2

3

244866. 05

245086. 58 220. 53

3s( 2 S)7p 7p >P° 1 244871. 47

3s( 2 S)7p 7p

3 P° 0 244928. 72 4 64

1 244933. 86

9. 95

2 244943. 31

3p( 2 P°)4p 4p' 3 P 0 247871. 66

82. 03

214. 35 12

247953. 69

248168. 04

3p(2 P°)4p 4p;i D 2 247935. 39

3p( 2 P°)4p 4p' 3 S 1 248772. 86

3s (

2S) Id 7d 3 D 1 249093. 5

10. 4

17. 24 2 249103. 90

3 249121. 14

3s( 2 S)8s 8s 3 S 1 249766. 19

3s(2 S)7

/

7/ 3 F° 2 249774. 48

0. 22

0. 28 3 249774. 70

4 249774. 98

3s( 2 S)7e 7g 3 G 3 249817. 32

0. 53

1. 08

4 249817. 85

5 249818. 93

3s( 2 S)7g 7g >G 4 249817. 94

3s( 2 S)8s 1 8s iS 0 249857. 26

Config. Desig. J Level Interval

3s( 2 S)7h 7/i 31 H° 4, 5,6 249937. 29

3s( 2 S)7i 7i 3 a 5, 6,7 249966. 49

3s( 2 S)7

/

7/ iF° 3 250366. 22

3s( 2 S)7d 7d 3 D 2 250636. 55

3s( 2 S)8<2 8d

3 D 1 [254002] 9 2 [254004] 0 3 254007. 48

3s( 2 S)8/ 8/ 3 F° 2 254557. 03 n 9** 3 254557. 26 n qq

4 254557. 64

U. Oo

3s( 2 S)8g 8g

3 G 4 254584. 6

3s(2 S)8fir 8? 3 G 3,4 254584. 8 1 n

5 254585. 75 1. u

3s( 2 S)8/i 8h 3 4H° 4, 5,6 254674. 4

3s( 2 S)8z 8i

3 41 5, 6, 7 254694. 99

3s( 2 S)8fc 8k 3 4K° 6, 7,8 [254702. 29]

3s( 2 S)8d 8d !D 2 254766. 75

3s( 2 S)8/ 8/ 1 F° 3 254855. 42

3s( 2 S)9d 9d

3 D 1, 2,3 257415. 6

3s( 2 S)9/ 9/ 3 F° 2, 3,4 257831. 4

3s(2 S)9d 9d J D 2 257848. 5

3s( 2 S)9<7 9p 3 G 3, 4,5 257853. 6

3s( 2 S)9/i 9/z 3 4H° 4, 5,6 257922. 0

3s( 2 S)9z CO

CO hH 5, 6,7 257936. 99

3s( 2 S)9fc 9A: 3 4K° 6, 7, 8 [257942. SO]

3s( 2 S)9

Z

9 1 3 4L 7, 8,9 [257944. 45]

3s( 2 S)9/ 9/ iF° 3 258013. 37

3p(2P°)4p 4p'»S 0 258978. 66

3p(2 P°)4d 4d'iD 0 ? 2 267483. 87

3p(2 P°)4d 4d’ 3 F°? 4 267686. 48

3,2

Si iv (

2 S0^) Limit 270139.3

3p( 2 P°)4/ 4/' [2H]? 3 278920. 68

3p(2 P°)4/ 4/' [3^]? 3 278938. 08

4 278938. 08

3p(2 P°)5p 5

p' ! P? 1 282291. 19?

3p(2P°)5/ 5/' [3K]? 3 301484 51

3p(2 P°)5<7 50' [4tf]° 5 301884- 14+x — 6 83

4 801890. 97+x

3p(2 P°)50 50'[3H]° 3 301887. 94 4 32

4 301892. 26

Si iv (

2 P^) Limit 341426. 8

Si iv (

2 P;^) j Limit 341887. 9

May 1964.

A14 m-2
Atomic

Energy

Levels

toS

PSHHaH>

PiH

to

PS Om

toa

J-i as Eh

T3

as>

tHas

t/2 .Oo ^

’"1 Al

co

g •os OS g 1 I>O CO X

Al CO gg

-g

051 co o o OOCO »-< o

Al co £ C75 "bs Os 05 00 LQ g 1 1 iO 1C O O oy—

pZH

tJH CO f-i Al co ^g | | g TtH Tf tJh' o oPh

co •— 7373

e^- CO

coo o COAl CQCO GQCO -H s V V 75 -53 73 73 73 OG OS CO g 1 1 CO CO

CO

O

O PhPh

COtTts

co co QQco »-< 'ssTa o o OhPh

CO 1“H PPPh

Al

PS. PS.

a

a rt< C^.

PS. g

4< 4* LO mmco *-<

Q

la. co

O

O Oh Pi

a. ps. co co

PS. co

mma

co

Tt< Alg

O o PhPl,

mm

<-9 co 00 00 I I Tjt + a • «© be a a g

ce cn CO £ o

ci <n o co

os 03CO

mCMCO

CM s

'a

co CO CO CO CO co

A14 in-3

Multiplet Table

Part B SILICON

Si III (Z= 14)

I P 33.49 eV Limit 270139.3 ±0.4 cm' 1 370.179 A (Vac)

Anal A List A April 1964

A

P

REFERENCES

Y. G. Toresson, Ark. Fys. (Stockholm) 18, No. 28, 389 to 416 (1960).

IP, T,CL, I,GD;WL 423 A to 9799 A

Predicted wavelength

New Multiplet Numbers, not inserted between older ones, start with UV 11 and 14. *Blend

*and § Blend of Si in and Si iv

Si III Si ill

I A Ref Int E p

J Multiplet

No.

I A Ref Int E P

J Multiplet

No.

Low High Low High

Vac Vac

1892.030 A 3t 0. 00 6. 55 0—

3s2 3 S —3p

3 P° 1447.196 A 6 6. 58 15. 15 2—2 3 p3 P° —3

p

2 l D

UV 1 1441.732 A 5 6. 55 15. 15 1—2 UV 3.05

1206.510J A 30* 0. 00 10. 28 0—

3s2 3 S —3p >P° 1298.960 A 18 6. 58 16. 13 2—2 3p

3 P° —3p 2 *P UV 2 1298.891 A 15 6. 55 16. 10 1—1 UV 4 1303.320 A 16 6. 58 16. 10 2—1

566.613 A 8 0. 00 21. 88 0—1 3s 2 »S —4p *P° 1301.146 A 14 6. 55 16. 08 1—0

UV 3 1294.543 A 17 6. 55 16. 13 1—2

1296.726 A 14 6. 54 16. 10 0—1

466.129 A 4 0. 00 26. 60 0—1 3s2 !S —5p ‘P°

UV 3.01 1113.228 A 18 6. 58 17. 72 2—3 3p

3 P° —3d 3 D

1109.970 A 16 6. 55 17. 72 1—2 UV 5 437.255 P 0. 00 28. 35 0—1 3s 2 »S —3d' ip° 1108.368 A 14 6. 54 17. 72 0—1

UV 3.02 1113.204 P 6. 58 17. 72 2—2

1109.940 P 16 6. 55 17. 72 1—1

426.644 P 0. 00 29. 06 0—1 3s 2 *S —6p »P° 1113.174 P 6. 58 17. 72 2—1

UV 3.03

423.817 P 0. 00 29. 25 0—1 3s 2 iS —4s' ip°

UV 3.04

B14 m-1
Si III—Continued

Multiplet Table

Si III

Continued

E P E P

I A Ref Int J Multiplet I A Ref Int J Multiplet

No. No.

Low High Low High

Vac Vac

997.389 A 16 6. 58 19. 02 2—1 3p 3 P° —4s 3 S 690. 689 A 2 10. 28 28. 23 1—2 3p iP 0 —

5

d *D

994.787 A 13 6. 55 19. 02 1—1 UV 6 UV 14

993.519 A 10 6. 54 19. 02 0—1

678. 055 A 2 10. 28 28. 56 1—0 3p ip°—6s 3 S

*673.477 A 5 6. 58 24. 99 2—3 3 p

3 P° —4d

3 D UV 15

*672.293 A 4 6. 55 24. 99 1—2 UV 6.01 671.718 A 2 6. 54 24. 99 0—1 634. 255 P 10. 28 29. 82 1—2 3p

1P°—6d iD

*673.477 A 5 6. 58 24. 99 2—2 UV 16

*672.293 A 4 6. 55 24. 99 1—1

*673.477 A 5 6. 58 24. 99 2—1 624.997 P 10. 28 30. 11 1—1 3p 'P° —4p' ip

3p 3 P° —5s 3 S

UV 17

653.332 A 8 6. 58 25. 56 2—1

652.223 A 6 6. 55 25. 56 1—1 UV 6.02 605.873 P 10. 28 30. 74 1—2 3p

ip° —4p' iD

651.668 A 4 6. 54 25. 56 0—1 UV 18

574.799 P 6. 58 28. 15 2—3 3p 3 P° —5d

3 D 567.878 P 10. 28 32. 11 1—0 3 p

ip° —ip' iS

573.951 P 6. 55 28. 15 1—2 UV 6.03 UV 19

573.538 P 6. 54 28. 15 0—1

574.814

573.961

P 6. 58 28. 15 2—2

P 6. 55 28. 15 1—1

574.824 P 6. 58 28. 15 2—1 1842.547 A 9 15. 15 21. 88 2—1 3p2 id —4p

ip°

UV 20

566.546 P 6. 58 28. 47 2—1 3p 3 P° —6s 3 S

565.698 A 2 6. 55 28. 47 1—1 UV 6.04 1210.456 A 10 15. 15 25. 39 2—3 3p2 id —4/

iF°

565.289 A 1 6. 54 28. 47 0—1 UV 21

534.189 P 6. 58 29. 79 2—3 3 p

3 P° —6d

3 D 1207.517 A 9 15. 15 25. 42 2—2 3

p

2 iD —3d' >D°

533.530 P 6. 55 29. 79 1—2 UV 6.05 UV 22

533.226 P 6. 54 29. 79 0—1

534.276 P 6. 58 29. 79 2—2 1083.210 A 6 15. 15 26. 60 2—1 3p2 *D —5p iP 0 533.592 P 6. 55 29. 79 1—1 UV 23

534.339 P 6. 58 29. 79 2—1

967.946 A 9 15. 15 27. 96 2—3 3p2 *D —5/ iF°

520. 92 A 0 6. 58 30. 39 2—3 3p

3 P°—4p

7 3 D UV 24

*520. 79 A 00 6. 55 30. 36 1—2 UV 6. 06

*520. 79 A 00 6. 54 30. 34 0—1 939.093 A 7 15. 15 28. 35 2—1 3p2 »D —3d' iP°

521. 510 P 6. 58 30. 36 2—2 UV 25

521. 149 P 6. 55 30. 34 1—1

521. 861 P 6. 58 30. 34 2—1 891.479 P 15. 15 29. 06 2—1 3p2 iD —6p ip°

UV 26

512. 681 P 6. 58 30. 77 2—2 3p 3 P°—4p' 3 P

512. 557 P 6. 55 30. 74 1—1 UV 6. 07 883.398 A 5 15. 15 29. 19 2—3 O Q 1CO

c* ft

CO 513. 245 P 6. 58 30. 74 2—1 UV 27

512. 772 P 6. 55 30. 73 1—0

511. 994 P 6. 55 30. 77 1—2 879.233 A 0 15. 15 29. 25 2—1 3p2 iD —4s' ip°

512. 219 P 6. 54 30. 74 0—1 UV 28

511. 096 P 6. 58 30. 84 2—1 3p 3 P°—4p' 3 S 822.004 P 15. 15 30. 24 2—3 3p2 »D —6/ iF°

510. 414 P 6. 55 30. 84 1—1 UV 6. 08 UV 29

510. 079 P 6. 54 30. 84 0—1

*1178.004 A 8 16. 13 26. 65 2—2 3p2 3 P —5p 3 P°

Air *1174.369 A 5 16. 10 26. 66 1—1 UV 30

2541. 818 A 25 10. 28 15. 15 1—2 3 p

1 P°—3p 2 3 D *1178.004 A 8 16. 13 26. 66 2—1

UV 6. 09 *1174.369 A 5 16. 10 26. 66 1—0

1174.432 A 6 16. 10 26. 65 1—2

Vac

1417. 237 A 13 10. 28 19. 02 1—0 3p ip°—3p2 1172.529 A 4 16. 08 26. 66 0—

1

UV 9 1161.579 A 8 16. 13 26. 80 2—2 3p2 3 P —3d' 3 P°

1156.782 A 4 16. 10 26. 82 1—1 UV 31

1312. 590 A 13 10. 28 19. 72 1—0 3 p >P°-4s J S 1160.255 A 6 16. 13 26. 82 2—1

UV 10 1155.957 A 6 16. 10 26. 82 1—0

1158.102 A 7 16. 10 26. 80 1—2

1206. 533 A 30* 10. 28 20. 55 1—2 3p ip°—

3

d

J D 1154.998 A 6 16. 08 26. 82 0—1

UV 11 1144.306 A 8 16. 13 26. 96 2—3 3p23P —3d' 3 D°

823. 408 A 9 10. 28 25. 33 1—2 3 p

iP 0 —

4

d

: D 1141.580 A 7 16. 10 26. 96 1—2 UV 32

UV 12 1140.545 A 6 16. 08 26. 95 0—1

1144.959 A 6 16. 13 26. 96 2—2

800. 066 A 5 10. 28 25. 77 1—0 3 v

1 P°—5s iS 1142.282 A 6 16. 10 26. 95 1—1

UV 13 1145.669 P 16. 13 26. 95 2—1

B14 m-2
Si III

Continued

Multiplet Table

Si III

Continued

I A Ref Int E P

J Multiplet

No.

Low High

Vac

1033.920 A 8 16. 13 28. 12 2—2 3p2 3 P —4s' 3 P°

1034.287 A 4 16. 10 28. 09 1—1 UV 33

1037.053 A 7 16. 13 28. 09 2—1

1035.657 A 3 16. 10 28. 07 1—0

1031.169 A 7 16. 10 28. 12 1—2

1032.851 A 3 16. 08 28. 09 0—1

Air

3086.236 A 25 17. 72 21. 74 3—2 3d 3 D —4p

3 P°

3093.424 A 20 17. 72 21. 73 2—1 1 3096.826 A 16 17. 72 21. 73 1—0

3086.46 A 6 17. 72 21. 74 2—2

3093.65 A 5 17. 72 21. 73 1—1

3086.666 P 17. 72 21. 74 1—2

2980.519 A 5 17. 72 21. 88 2—1 3d 3 D —4p 1 P°

UV 34

Vac

1778.715 P 17. 72 24. 69 3—4 3d 3 D —3d' 3 F°

1783.146 P 17. 72 24. 68 2—3 UV 35

1786.515 P 17. 72 24. 66 1—2

1783.079 P 17. 72 24. 68 3—3

1786.438 P 17. 72 24. 66 2—2

1786.371 P 17. 72 24. 66 3—2

1500.241 A 12 17. 72 25. 99 3—4 3d 3 D —4/ 3 F°

1501.191 A 10 17. 72 25. 98 2—3 UV 36

1501.870 A 9 17. 72 25. 98 1—2

1501.150 P 17. 72 25. 98 3—3

1501.827 P 17. 72 25. 98 2—2

1501.780 P 17. 72 25. 98 3—2

1388.011 Pi (17. 72 26. 65 3—2 3d 3 D —5p

3 P°

1387.948 P 17. 72 26. 66 2—1 UV 37

1387.979 P . 17. 72 26. 66 1—0

1388.052 P( 0

17. 72 26. 65 2—2

1387.994 P 17. 72 26. 66 1—1

1388.098 Pj U7. 72 26. 65 1—2

1365.253 P 8 17. 72 26. 80 3—2 3d 3 D —3d' 3 P°

1363.459 P 7 17. 72 26. 82 2—1 UV 38

1362.366 A 5 17. 72 26. 82 1—0

1365.292 P 17. 72 26. 80 2—2

1363.504 P 17. 72 26. 82 1—1

1365.337 P 17. 72 26. 80 1—2

1341.465 A 8 17. 72 26. 96 3—3 3d 3 D —3d' 3 D°

1342.392 A 7 17. 72 26. 96 2—2 UV 39

*1343.388 A 6 17. 72 26. 95 1—1

1342.351 P 17. 72 26. 96 3—2

*1343.388 A 6 17. 72 26. 95 2—1

1341.496 P 17. 72 26. 96 2—3

1342.432 P 17. 72 26. 96 1—2

1192.228 P 17. 72 28. 12 3—2 3d 3 D —4s' 3P°

1196.436 P 17. 72 28. 09 2—1 UV 40

1198.297 P 17. 72 28. 07 1—0

1192.258 P 17. 72 28. 12 2—2

1196.470 P 17. 72 28. 09 1—1

1192.293 P 17. 72 28. 12 1—2

1145.122 P 8* 17. 72 28. 55 3—4 3d 3 D —5/ 3 F°

1145.177 P\ /17. 72 28. 55 2—3 UV 41

1145.22 Pj i * \17. 72 28. 55 1—2

1145.149 P 8* 17. 72 28. 55 3—3

1145.19 P\ 7* /17. 72 28. 55 2—2

1145.16 pJ

i \17. 72 28. 55 3—2

E P

I A Ref Int J Multiplet

No.

Low High

Vac

1092.915 P 17. 72 29. 07 3—2 3d 3 D —6p 3 P°

1093.105 P 17. 72 29. 06 2—1 UV 42

1093.293 P 17. 72 29. 06 1—0

1092.940 P 17. 72 29. 07 2—2

1093.133 P 17. 72 29. 06 1—1

1092.969 P 17. 72 29. 07 1—2

1005.349 pl (17. 72 30. 05 3—4 3d 3 D —6/ 3 F°

1005.374 P 17. 72 30. 05 2—3 UV 43

1005.403 P 7* 17. 72 30. 05 1—2

1005.353 P 17. 72 30. 05 3—3

1005.378 P 17. 72 30. 05 2—2

1005.357 Pj ll7. 72 30. 05 3—2

936.056 Pj (17. 72 30. 97 3—4 3d 3 D —7/ 3 F°

936.077 P 17. 72 30. 97 2—3 UV 44

936.100 P 3* 17. 72 30. 97 1—2

936.058 P 17. 72 30. 97 3—3

936.079 P 17. 72 30. 97 2—2

936.060 Pj ll7. 72 30. 97 3—2

Air

4552.616 A 30 19. 02 21. 74 1—2 4s 3 S —4p 3 P°

4567.823 A 25 19. 02 21. 73 1—1 2 4574.759 A 20 19. 02 21. 73 1—0

Vac

1623.055 P 19. 02 26. 65 1—2 4s 3 S —5p

3 P°

1622.913 P 19. 02 26. 66 1—1 UV 45

1622.892 P 19. 02 26. 66 1—0

1361.597 A 8 19. 02 28. 12 1—2 4s 3 S —4s' 3 P°

1367.049 A 7 19. 02 28. 09 1—1 UV 46

1369.437 A 5 19. 02 28. 07 1—0

Air

4338.501 A 9 19. 02 21. 88 0—1 3

p

2 *S —4p

3 P

0 3 Vac

1636.990 A 1 19. 02 26. 60 0—1 3p2 3 S —5p U>°

UV 47

1328.806 P 19. 02 28. 35 0—1 3

p

2 3 S —3d' >P°

UV 48

1235.431 A 7 19. 02 29. 06 0—1 3

p

2 —6p

ip ° UV 49

1212.011 A 2 19. 02 29. 25 0—1 3p2 is —4s' !P°

UV 50

Air

6173.712 A 3 19. 72 21. 73 0—1 4s *S —4p 3 P°

3.01

5739.733 A 20 19. 72 21. 88 O—l 4s >S —4p 1 P°

4

Vac

1803.023 A 3 19. 72 26. 60 0—1 4s 3 S —5p »P°

UV 51

1436.166 A 7 19. 72 28. 35 0—1 4s ‘S —3d' >P°

UV 52

1327.703 P 19. 72 29. 06 0—1 4s »S —6p »P°

UV 53

B14 iu-3
Si III —Continued

Multiplet Table

Si IIIContinued

I A Ref Int E P

J Multiplet

No.

I A Ref Int E P

J Multiplet

No.

Low High Low High

Vac Vac

1300.703 P 19. 72 29. 25 0—

1

4s ‘S —4s' 1 P° 1361.719 P 21. 74 30. 84 2—1 4p 3 P° —4p' 3 S

UV 54 1360.360 A 1 21. 73 30. 84 1—1 UV 68

1359.751 P 21. 73 30. 84 0—1

Air Air

9323.899 A 3h 20. 55 21. 88 2—1 3 d >D —4p 1 P° 3981.238 A 5 21. 88 24. 99 1—1 4p ip° —4d 3 D

4.01 6.01

2559.210 A 14 20. 55 25. 39 2—3 3d *D —4/ l F° 3590.465 A 20 21. 88 25. 33 1—2 4p >P° —4d l F> UV 55 7

2546.093 A 10 20. 55 25. 42 2—2 3d —3d' >D° 3185.125 A 16 21. 88 25. 77 1—0 4p JP° —5s 3 S

UV 56 8

2049.913 A 2 20. 55 26. 60 2—1 3d *D —5p

1 P° Vac

UV 57 1953.968 P 21. 88 28. 23 1—2 4p »P° —5d *D

UV 69

Vac

1673.315 A 7 20. 55 27. 96 2—3 3d 3 D —5f

1 F° 1856.062 A 1 21. 88 28. 56 1—0 4p 1 P° —6s »S UV 58 UV 70

1588.950 A 2 20. 55 28. 35 2—1 3d 3 D —3d' >P° 1560.974 P 21. 88 29. 82 1—2 4p ip° —6d »D

UV 59 UV 71

1457.253 A 5 20. 55 29. 06 2—1 3d 3 D —6p J P° 1506.060 A 6 21. 88 30. 11 1—1 4p »P° —4p' ip

UV 60 UV 72

1435.776 A 8 20. 55 29. 19 2—3 3d l F> —3d' 1 F° 1399.615 P 21. 88 30. 74 1—2 4p >P° —4p' ‘D

UV 61 UV 73

1424.775 A 2 20. 55 29. 25 2—1 3d J D —4s' 3 P

0 1212.247 P 21. 88 32. 11 1—0 4p T0 —4p' 3 S

UV 62 UV 74

1280.354 A 6 20. 55 30. 24 2—3 3d 3 D —6/ l F°

UV 63 Air

3580.050 A 3h 24. 69 28. 15 4—3 3d' 3 F° —5d 3 D

1182.018 A 3 20. 55 31. 04 2—3 3d 3 D —7/ l F° 3563.11 A 2h* 24. 68 28. 15 3—2 8.01 UV 64 3550.38 A 1 h* 24. 66 28. 15 2—1

3210.554 A 15 24. 69 28. 55 4—5 3d' 3 F° —5g

3 G

3196.504 A 14 24. 68 28. 55 3—4 8.02

Air 3186.022 A 13 24. 66 28. 55 2—3

3806.544 A 30 21. 74 24. 99 2—3 4p

3 P° —4d 3D

3796.114 A 25 21. 73 24. 99 1—2 5 2429.35 A 7* 24. 69 29. 79 4—3 3d' 3 F° —6d 3 D

3791.41 A 20* 21. 73 24. 99 0—1 2423.049 P 24. 68 29. 79 3—2 UV 75

2418.281 P 24. 66 29. 79 2—1

3447.938 P 21. 74 25. 33 2—2 4p 3 P° _4d iD 2308.191 A 10 24. 69 30. 06 4—5 3d' 3 F° —6<7

3 G

3439.242 A 3 21. 73 25. 33 1—2 5.01 2300.930 A 8 24. 68 30. 06 3—4 UV 76

2295.476 A 6 24. 66 30. 06 2—3

3241.622 A 15 21. 74 25. 56 2—1 4p

3 P° —5s 3 S

3233.954 A 14 21. 73 25. 56 1—1 6 2176.894 A 5 24. 69 30. 39 4—3 3d' 3 F° —4p' 3 D

3230.499 A 12 21. 73 25. 56 0—1 2180.836 A 4 24. 68 30. 36 3—2 UV 77

2182.049 A 3 24. 66 30. 34 2—1

Vac 2170.42 A 0 24. 68 30. 39 3—3

1842.064 P 21. 74 28. 47 2—1 4p

3 P° —6s 3 S

1839.585 P 21. 73 28. 47 1—1 UV 65

1838.466 P 21. 73 28. 47 0—1

7466.322 A 9h 24. 99 26. 65 3—2 4d 3 D —5p 3 P°

1433.690 A 6 21. 74 30. 39 2—3 4p

3 P° —4p' 3 D *7462.624 A 8h 24. 99 26. 66 2—1 8.03

1436.724 A 4 21. 73 30. 36 1—2 UV 66 7461.890 A 5h 24. 99 26. 66 1—0

1438.702 A 2 21. 73 30. 34 0—1 7465.669 A 4h 24. 99 26. 65 2—2

1438.228 A 2 21. 74 30. 36 2—2 7462.347 P 24. 99 26. 66 1—1

1439.391 A 2 21. 73 30. 34 1—1

1440.908 P 21. 74 30. 34 2—1 6851.65 A 7h 24. 99 26. 80 3—2 4d 3 D —3d' 3 P°

6805.244 A 4h 24. 99 26. 82 2—1 8.04

6776.623 A 2h 24. 99 26. 82 1—0

1373.030 A 5 21. 74 30. 77 2—2 4p 3p° _4p' 3 p 6851.18 A 3h 24. 99 26. 80 2—2

1375.688 A 2 21. 73 30. 74 1—1 UV 67 6805.029 P 24. 99 26. 82 1—1

1377.082 A 3 21. 74 30. 74 2—1

1377.238 A 2 21. 73 30. 73 1—0

1371.652 A 3 21. 73 30. 77 1—2

1375.083 A 2 21. 73 30. 74 0—1

B14 m-4
Si III —Continued

Multiplet Table

Si III—Continued

I A Ref Int E P

J Multiplet

No.

I A Ref Int E P

J Multiplet

No.

Low High Low High

Air Air

3963.838 A 6 24. 99 28. 12 3—2 4d

3 D —4s' 3 P° 4800.428 A 8 25. 77 28. 35 0—1 5s »S —3d' >P°

*4010.192 A 4 24. 99 28. 09 2—1 8.05 8.16

4030.752 A 2 24. 99 28. 07 1—0

3963.671 P 24. 99 28. 12 2—2

*4010.192 A 4 24. 99 28. 09 1—1 5716.289 A 8 25. 99 28. 15 4—3 4/ 3 F° —5d 3 D

5704.598 A 7 25. 98 28. 15 3—2 8.17

3486.911 A 15 24. 99 28. 55 4d 3 D —5/ 3F° 5696.50 A 7* 25. 98 28. 15 2—1

8.06 5703.121 A 4 25. 98 28. 15 3—3

5695.522 A 3 25. 98 28. 15 2—2

3043.932 A 7 24. 99 29. 07 3—2 4d

3 D —6p

3 P°

3045.076 A 5 24. 99 29. 06 2—1 8.07 4828.968 A 18 25. 99 28. 55 4—5 4/ 3 F° —5? 3 G

3046.284 A 3 24. 99 29. 06 1—0 4819.718 A 16 25. 98 28. 55 3—4 9 4813.330 A 15 25. 98 28. 55 2—3

2449.484 A 11 24. 99 30. 05 4d 3 D —6/ 3 F°

UV 78 3254.800 A 7 25. 99 29. 79 4—3 4/ 3 F° —6d 3 D

3253.741 A 5 25. 98 29. 79 3—2 9.01 2306.42 A 2h* 24. 99 30. 37 3—2 4d 3 D —7p 3 P° 3253.117 A 4 25. 98 29. 79 2—1

2306.889 P 1 h* 24. 99 30. 37 2—1 UV 79 3250.56 A 1 25. 98 29. 79 3—3

2307.107 P 24. 99 30. 37 1—0 3250.79 A 1 25. 98 29. 79 2—2

2075.04 A 2h 24 99 30. 97 4d 3 D —7/ 3 F° 3040.933 A 9 25. 99 30. 06 4—5 4/ 3 F° —0g 3 G

UV 80 3037.287 A 8 25. 98 30. 06 3—4 10

3034.732 A 6 25. 98 30. 06 2—

9799.906 A 2h 25. 33 26. 60 2—1 4d *D —5p

1 F° 2817.110 A 9 25. 99 30. 39 4—3 4/ 3 F° —4p' 3 D

8.08 2831.490 A 7 25. 98 30. 36 3—2 UV 88

2839.622 A 5 25. 98 30. 34 2—1

4716.651 A 16 25. 33 27. 96 2—3 4d 3 D —5/

1 F° 2813.912 P 25. 98 30. 39 3—3

8.09 2829.23 A 1* 25. 98 30. 36 2—2

4102.422 A 8 25. 33 28. 35 2—1 4d 3 D —3d' 3 P° m2485.623 P Cu ii 25. 99 30. 97 4—5 4/ 3 F° —7g 3 G

8.10 2483.196 A 6 25. 98 30. 97 3—4 UV 89

2481.508 A 3 25. 98 30. 97 2—3

3216.249 A 7 25. 33 29. 19 2—3 4d *D —3d' 1 F°

8.11

3161.610 A 8 25. 33 29. 25 2—1 4d *D —4s' 3 P° 7612.356 A 12h 26. 60 28. 23 1—2 5p

1 P° —5d *D

8.12 10.01 m2528.471 P Si i 25. 33 30. 24 2—3 4d *D -6/>F° 6314.459 A 7 26. 60 28. 56 1—0 5 p 'F° —0s 3 S

UV 81 10.02

2171.559 A 1 25. 33 31. 04 2—3 4d *D —7f

3 F° 3842.458 A 7 26. 60 29. 82 1—2 5p

3 P ° —6d !D

UV 82 10.03

Vac

ml979.233 P Si i 25. 33 31. 60 2—3 4d 3 D —8/ 1 F° 3569.673 A 8 26. 60 30. 07 1—0 5p ‘P° —7s >S UV 83 10.04

Air 3525.939 A 9 26. 60 30. 11 1—1 5p

1 P° —4p' *P

4377.626 A 8h 25. 39 28. 23 3—2 4/ 1 F° —5d *D 10.05

8.13

2830.02 A 1* 26. 60 30. 98 1—0 bp >P° —8s 3 S

3924.468 A 20 25. 39 28. 55 3—4 4/ 1 F° —5g'G UV 90

8.14

2655.512 A 14 25. 39 30. 06 3—4 4/ 3 F° —6g *G

UV 84 8262.568 A Oh 26. 65 28. 15 2—3 bp 3 P° —5d 3 D

8269.324 A 8h 26. 66 28. 15 1—2 10.06

2222.01 A 2h 25. 39 30. 97 3—4 4/ 3 F° —7g

3 G 8271.944 A 6h 26. 66 28. 15 0—1

UV 85 8265.640 A 5h 26. 65 28. 15 2—2

8271.377 A 5h 26. 66 28. 15 1—1

8267.75 A Oh 26. 65 28. 15 2—1

2640.788 A 11 25. 42 30. 11 2—1 3d' >D°-4p' 3 P

UV 86 6831.560 A Oh 26. 65 28. 47 2—1 bp 3p 0 —6s 3 S

6834.08 A 4/i 26. 66 28. 47 1—1 10.07 2329.931 A 2h 25. 42 30. 74 2—2 3d' ‘D°-4p' 3 D 6834.38 A 2h 26. 66 28. 47 0—1

UV 87

3947.488 A Oh 26. 65 29. 79 2—3 bp 3 P° —6d 3 D

3953.080 A 4h 26. 66 29. 79 1—2 10.0S

3956.66 A 2h 26. 66 29 79 0—

4842.57 A 5* 25. 56 28. 12 1—2 5s 3 S —4s' 3 P° 3952.239 A 1 h 26. 65 29. 79 2—2

4912.332 A 4 25. 56 28. 09 1—1 8.15 3956.55 A 1 h 26. 66 29. 79 1—1

m4943.260 P On 25. 56 28. 07 1—0

3681.402 A 7h 26. 65 30. 02 2—1 bp 3 P° —7s 3 S

3682.15 A 5h 26. 66 30. 02 1—1 10.09

1 3682.25 A 2h 26. 66 30. 02 0—1

B14 m-5
Multiplet Table

Si III—Continued Si III

Continued

E P E P

I A Ref Int J Multiplet I A Ref Int J Multiplet

No. No.

Low High Low High

Air Air

3321.578 A 4 26. 65 30. 39 2—3 5p 3 P° —4p' 3 D 6111.571 A 1 28. 09 30. 11 1—1 4s' 3 P° —

4

p' ip

3346.717 A 2 26. 66 30. 36 1—2 10.10 12.07

3361.343 P 26. 66 30. 34 0—1

5473.045 A 7 28. 12 30. 39 2—3 4s' 3 P° —4p' 3 D

3013.091 A 5 26. 65 30. 77 2—2 5 p 12.08 3P° —4p' 3 P 5451.462 A 6 28. 09 30. 36 1—2

3032.66 A 4* 26. 65 30. 74 2—1 10.11 5451.961 A 4 28. 07 30. 34 0—1

5539.926 A 3 28. 12 30. 36 2—2

2959.150 A 5 26. 65 30. 84 2—1 5p

3 P° —4p' 3 S 5490.114 A 3 28. 09 30. 34 1—1

*2959.67 A 3* 26. 66 30. 84 1—1 UV 91 5579.94 A 0 28. 12 30. 34 2—1

*2959.67 A 3* 26. 66 30. 84 0—1

4683.022 A 9 28. 12 30. 77 2—2 4s' 3P° —4p' 3 P

2874.626 A 4 26. 65 30. 97 2—1 5p

3 P° —8s 3 S 4665.869 A 8 28. 09 30. 74 1—1 13

*2875.09 A 2* 26. 66 30. 97 1—1 UV 92 4730.519 A 7 28. 12 30. 74 2—1

*2875.09 A 2* 26. 66 30. 97 0—1 4683.797 A 7 28. 09 30. 73 1—0

4619.657 A 7 28. 09 30. 77 1—2

4638.277 A 7 28. 07 30. 74 0—

1

7442.327 A 4h 26. 80 28. 47 2—1 3d' 3 P° —6s 3 S 4734.627 A 2 28. 12 30. 74 2—2 4s' ap° _4p> i D

7497.286 A 3h 26. 82 28. 47 1—1 10.12 4669.89 A 1 28. 09 30. 74 1—2 14

7532.055 A lh 26. 82 28. 47 0—1

4553.996 A 8 28. 12 30. 84 2—1 4s' 3 P° —4p' 3 S

15 3126.267 A 6 26. 80 30. 77 2—2 3d' 3 P° —4p' 3 P 4494.048 A 6 28. 09 30. 84 1—1

3157.159 A 1 26. 82 30. 74 1—1 11 4468.452 A 2 28. 07 30. 84 0—1

3147.371 A 7 26. 80 30. 74 2—1

*3165. 38§ A 2 26. 82 30. 73 1—0 4482.884 A 3h 28. 12 30. 89 2—3 4s' 3 P° —7d 3 D

3135.906 A 3 26. 82 30. 77 1—2 4428.146 A lh 28. 09 30. 88 1—2 16

3163.281

3068.238

A 2 26. 82

26. 80

30. 74

30. 84

0—1

3d' 3 P° —4p' 3 S

4486.28 A Oh 28. 12 30. 88 2—2

A 7 2—

1

3077.523 A 4 26. 82 30. 84 1—1 11.01 6524.357 A Oh 28. 15 30. 05 3—4 5d S D —6/ 3 F°

3083.363 A 2 26. 82 30. 84 0—1

6522.626 A 4h 28. 15 30. 05 2—3 17

6521.485 A 3h 28. 15 30. 05 1—2

4379.876 A lh 26. 96 29. 79 3—3 3d' 3 D° —6d 3 D 5599.246 A 4 28. 15 30. 37 3—2 5d 3 D —Ip 3 P°

11.02 5600.952 A 3 28. 15 30. 37 2—1 18

, 5601.461 A 2 28. 15 30. 37 1—0

3622.538 A 8h 26. 96 30. 39 3—3 3d' 3 D° —4p' 3 D 5597.90 A 0. 5 28. 15 30. 37 2—2

3645.123 A 6h 26. 96 30. 36 2—2 11.03 5600.00 A 0 28. 15 30. 37 1—1

3655.112 A 4h 26. 95 30. 34 1—1

3651.721 A 2h 26. 96 30. 36 3—2 4406.721 A 8h 28. 15 30. 97 3—

4

5d

3 D —7/ 3 F°

3662.366

3616.040

3637.943

A

A

A

2h

lh

2h

26. 96

26. 96

26. 95

30. 34

30. 39

30. 36

2—1

2—3

1—2

4405.901

4405.351

A

A

Oh

4h

28. 15

28. 15

30. 97

30. 97

2—3

1—2

19

3258.664 A 12 26. 96 30. 77 3—2 3d' 3 D° —4p' 3 P 3639.445 A 5h 28. 15 31. 56 3—4 5d 3 D —8/ 3 F°

3276.264 A 10 26. 96 30. 74 2—1 12 3638.898 A 3h 28. 15 31. 56 2—3 20

3279.258 A 7 26. 95 30. 73 1—0 3638.524 A 2h 28. 15 31. 56 1—2

3253.401 A 7 26. 96 30. 77 2—2

3270.456 A 6 26. 95 30. 74 1—1 3251.871 A lh 28. 15 31. 97 3— 5d 3 D —9/ 3 F°

3283.570

3251.383 A 0. 5 28. 15 31. 97 2— 21

A 1 26. 96 30. 74 3—2 3d' 3 D° —4p' iD 3251.07 P Oh 28. 15 31. 97 1—

12.01

5898.788 A lOh 27. 96 30. 06 3—4 5/ 'F° —6<7 3 G

6169.835 A 3h 28. 23 30. 24 2—3 5d 3 D —Of 1F°

22

12.02

4461.27 A 0 27. 96 30. 74 3—2 5/ ip 0 _4p' iD 5810.187 A 3h 28. 23 30. 36 2—1 5d l D —Ip 1 P°

23 12.03

4115.504 A 5h 27. 96 30. 97 3—4 5/»F° —7^‘G m4403.830 P Si iv 28. 23 31. 04 2—3 5d *D —7/ 1 F°

12.04 24

3440.37 A 5* 27. 96 31. 56 3—4 5/ 1 F° —8g

l G 3676.731 A 3 h 28. 23 31. 60 2—3 5d *D —8/ ‘F 0 12.05 25

7408.467 A 3h 28. 12 29. 79 2—3 4s' 3 P° —6d 3 D 8436.487 A lh 28. 35 29. 82 1—2 3d' 1 P° —6d *D

7267.090 A 2h 28. 09 29. 79 1—2 12.06 26

7211.836 A lh 28. 07 29. 79 0—1

7425.10 A lh 28. 12 29. 79 2—

2

*7047.58§ A bh 28. 35 30. 11 1—1 3d' >P° —4p' »P 7278.79 A Oh 28. 09 29. 79 i—i 27

B14 iu-6
Multiplet Table

Si Hi—Continued Si III —Continued

E P E P

I A Ref Int J Multiplet I A Ref Int J Multiplet

No. No.

Low High Low High

Air Air

5135.110 A 3 28. 35 30. 77 1—2 3

d' ‘P 0 —4p' 3 P 8341.931 A 2h 29. 25 30. 74 1—2 4s' J P

0 —4p' >D

28 44

5197.264 A 5 28. 35 30. 74 1—2 3d' »P° —4p' l B 7189.072 A Ih 29. 25 30. 98 1—0 4s' ip° —8s 3 S

29

4341.400 8 29. 25 32. 11 1—0

45

4s' 1 P° —4p’ 3 A S

46

8191.679 A 8h 28. 55 30. 06 4—5 5/ 3 F° —60 3 G

8191.16 A 6h 28. 55 30. 06 3—4 30 2157.280 A 2 29. 25 35. 00 1—1 4s' l P° —5p' l P?

*8190.431

*8190.431

A 7h

7h

28. 55

28. 55

30. 06

30. 06

2—3

5/ 3 F° —Og *G

UV 95

A 3—

31

5724.609 A 1 h 29. 82 31. 99 2—3 6d *D —9/ 1 F°

5303.415 A 2 28. 55 30. 89 4—3 5/ 3F° —7d 3 D 47

5307.709 A 1 28. 55 30. 88 3—2 32

5310.390 A 1 28. 55 30. 88 2—1

8212.05 A 2 H 30. 05 31. 56 6/ 3 F° —8g 3 G

5114.116 A 8h 28. 55 30. 97 4—5 5/ 3F° —7g 3 G 48

*5113.76 A 7h 28. 55 30. 97 3—4 33

*5113.76 A 7h 28. 55 30. 97 2—3 6662.95 A OH 30. 05 31. 91 6/ 3 F° —9d 3 D

49

4211.679 A 2h 28. 55 31. 49 4—3 5/ 3 F° —8d 3 D

34 6473.96 A 1 H 30. 05 31. 97 6/ 3 F° —9g 3 G

50

4111.512 A 3h 28. 55 31. 56 4—5 5/ 3 F° —8g 3G

4111.255 A 2 h 28. 55 31. 56 3—4 35

8194.71 A 3 H* 30. 06 31. 57 5— 6g 31G —8/i 31H°

8194.18 A 3 H 30. 06 31. 57 4,3—

5—

51

8255.81 A 1 H 28. 55 30. 05 5g 3 G —6/ 3 F° 6471.86 A 2H 30. 06 31. 98 Og 3 G —9ft ^H 0 36 52

8103.448 A 11 h 28. 55 30. 08 5— 5g 3 ^G —Oh 31 H°

8102.862 A 9 h 28. 55 30. 08 4,3- 37 8292.615 A 3h 30. 08 31. 58 Oh 3 ' X H°

8i 31I 53

5091.419 A 10h 28. 55 30. 99 59 3.ig —7h

3 ’ 1 H°

38 6535.163 A 2h 30. 08 31. 98 Oh ^H0 —9i 3 - 1 I 54

4101.86 A 5 H 28. 55 31. 57 5g 31G —8h

31H°

39

4064.113 A 2 h 30. 11 33. 16 1—2 4p

f J P —4d ,1 D°?

3619.581 A 3 h 28. 55 31. 98 5— 5g 3 G —9^. 31H°

40

55

9173.267 2h 30. 24 31. 59 Of 1 F° —8d A 3— 3 D

56

6152.556 A 2 29. 06 31. 07 1—2 Op >P° —7

41 7151.08 A 2 H 30. 24 31. 97 3—2 6/ 1 F° —9d !D

57

6810.594 A Ih 29. 07 30. 89 2—3 Op 3 P° —7d 3 D 4423.556 A 4h 30. 39 33. 19 3—4 4p' 3 D —4d' 3 F°?

6812.200 A 0. 5 29. 06 30. 88 1—2 42 58

6810.79 A Oh 29. 06 30. 88 0—1

8728.019 A 3 h 33. 16 34. 58 4d' 2— 1 D° —4/' [3 y2]?

59

7984.20 A Oh 29. 19 30. 74 3—

3d' 3 F

0 —4p' 3 D

43

4351.974 A 2 h 34. 58 37. 43 3—4 4/' [2^]—5g' [3K2 ] 0 ? 2296.873 A 10 29. 19 34. 58 3—3 3d' >F° —4/'[3}/

2 ]? 4352.810 A 2 h 34. 58 37. 43 3—3 60

UV 93

Vac

1513.533 A 2 29. 19 37. 38 3—3 3d' ‘F° —5/' [3H]? 4356.821 A 4h (34. 58 37. 43) 4—

4/' [3>4]—

g' [4^]°?

UV 94 4355.525 A 3 h (34. 58 37. 43) 4—4 61

4355.281 A 3 h 34. 58 37. 43 3—4 M]°7

4356.100 A 2h 34. 58 37. 43 3—3

B14 m-7
Rjfl
NSRDS-NBS 3, SECTION 1

SILICON, Z=li

A Si iv Atomic Energy Levels

B Si iv Multiplet Table

Atomic Energy Levels

Part A SILICON

Si IV

(Na i sequence; 11 electrons) Z—14

Ground state Is2 2s2 2p

6 3s 2S0 ^

3s 2S0 ^

364093.1 ±0.6 cm" 1

, 274.655 A (Vac) I P 45.14 eV

Toresson has reobserved the spectrum from 400 A to 10000 A. He has revised and extended

the entire term system and thus made it possible to calculate reliable wavelengths for extended

series members.

The limit is well determined by application of the polarization formula to the hydrogen-like

terms 4,5/

2F° and 5g 2G. The undisturbed nf, ng, nh and ni series are excellently represented.

REFERENCE

Y. G. Toresson, Ark. Fys. (Stockholm) 17, No. 12, 179 to 192 (1960). I P, T, C L, G D

Si iv Si IV

Config. Desig. J Level Interval Config. Desig. J Level Interval

3s 3s 2 S oy2 0. 00

Qh 6h 2 H° / 4)4

l 5)4 |

315317. 36

3V 3V

2 P° 0)4 772S7. 54 461. 10 l/2 7174S. 04 7s 7s 0)4 2 S 318742. 79

3d 3d 2 D 2/2 160374. 41 -1. 19 7P 7p

2 P° 0)4 322312. 93

24. 90

1)4 160375. 60 1)4 322337. 83

4s 4s 2 S 0)4 193978. 89

7d Id 2 D

r i)4

l 2)4 |

327361. 97

4p 4p 2P° 0/2 218266. 86

161. 81

1/2 218428. 67

7/ 7j

2 jp ° / 2)4

l 3)4 }

328200. 04

4d 4d 2 D 2)4 250008. 02 - 0. 12

1)4 250008. 14

7g 7g

2 G

r 3)4

l 4)4 }

328249. 64

4/ 4/ 2F° 2)4 254127. 08

1. 95

3)4 254129. 03

7h 7h 2 H° / 4)4

l 5)4 |

328257. 12

5s 5s 2 S 0)4 265417. 95

5p 5p

2 P° 0)4

1/2 276503. 67

276579. 03 75. 36

7i 7i

2 I

f 5)4

\ 6)4 }

328260. 76

8s 8s

2 S 0)4 330439. 66

5d 5d 2 D 1)4 291497. 50

0. 10

2)4 291497. 60 8V 8v

2 P° 0)4 332743. 87

16. 05

1)4 332759. 92

5/ 5f

2 F° 1 2)4

l 3)4 |

293718. 99

8d 8d

2 D / 1)4

l 2)4 |

336051. 55

59 5g

2 G

[ 3)4

l 4)4 }

293837. 92

8/

8/

2 F° {

2)4

l 3)4 |

336616. 55

6s 6s

2 S 0)4 299676. 95

6p 6v

2 P° 0)4 305641. 10

41. 17

8g 8g

2 G / 3)4

l 4)4 |

336650. 69

1)4 305682. 27

6d 6d 2 D J 1)4

l 2)4 |

313914. 92

Si v OSo) Limit 364093. 1

6/ 6/

2 F° / 2)4

l 3)4 |

315230. 27 May 1964.

6? 6g

3 G / 3)4

l 4)4 |

315305. 28

A14 iv-1

Multiplet Table

Part B SILICON

Si IV (Z= 14)

I P 45.14 eV Limit 364093.1 ±0.6 cm'1 274.655 A (Vac)

Anal A List A April 1964

REFERENCES

A Y. G. Toresson, Ark. Fys. (Stockholm) 17, No. 12, 179 to 192 (1960).

I P, T, C L, I, GD;WL 400 A to 10000 A

P Predicted Wavelength

New Multiplet Numbers, not inserted between older ones, start with UV 5 and 8.

Si iv Si iv

E P E P

I A Ref Int J Multiplet I A Ref Int J Multiplet

No. No.

Low High Low High

Vac Vac

1393.755 A 15 0.00 8.90 oy2—iy 3s 2 S —3p 2 P° 860.551 P 19.88 34.29 2)4—1)4 3d 2 D —5p 2 P°

1402.769 A 12 0.00 8.84 oy—

*4 UV 1 861.118 P 19.88 34.28 1 )4—oy UV 12

860.560 P 19.88 34.29 iy—1)4 457.818 A 4 0.00 27.08 oy—iy 3s 2 S —4p 2 P°

458.155 A 3 0.00 27.06 oy—oy2 UV 2 749.941 A 5 19.88 36.42 3d 2 D —5/ 2 F°

UV 13

361.560 P 0.00 34.29 oy2—iy2 3s 2 S —5p 2 P°

361.659 P 0.00 34.28 oy—0/2 UV 2.01 688.194 P 19.88 37.90 2y—iy 3d 2 D —6p 2 P°

688.395 P 19.88 37.89 1 y—oy2 UV 14

327.137 P 0.00 37.90 ov2—iy2 3s 2 S —6p 2 P° 688.200 P 19.88 37.90 iy—iy

327.181 P 0.00 37.89 oy—oy UV 2.02

645.759 A 2 19.88 39.08 3d 2 D —6/

2F

0 UV 15

1128.340 A 10 8.90 19.88 iy—2y oy—iy 3p 2 P°—3d 2 D

1122.486 A 8 8.84 19.88 UV 3 1128.325 P 8.90 19.88 iy—iy Air

4088.854 A 10 24.05 27.08 oy—iy 4s 2 S —4p 2 P°

818.129 A 8 8.90 24.05 iy—oy 3p 2 P°—4s 2 S 4116.097 A 9 24.05 27.06 oy—oy 1 815.049 A 7 8.84 24.05 oy—oy2 UV 4 Vac

560.980 P 8.90 31.00 1 y— 3p 2P° —4d 2 D 1210.652 P 24.05 34.29 0/2—1/2 4s 2 S —5p

2 P°

559.533 P 8.84 31.00 oyr-iy UV 5 1211.757 P 24.05 34.28 o)4—oy UV 16

516.348

515.118

A

A

3

2 8.90

8.84

32.91

32.91

1)4 oy

oy—oy2 3p 2P° —5s 2 S

UV 6

895.228

895.558

P

P

24.05

24.05

37.90

37.89

oy—iy

oy—oy

4s 2 S —6p 2 P°

UV 17

455.065 P 8.90 36.14 iy2- 3p

2 P° —5d 2 D

454.112 P Air 8.84 36.14 oy2—iy2 UV 7 iy—2% 4p

2 P°—4d *3165.710 A 9 27.08 31.00 2 D

3149.561 A 7 27.06 31.00 oy2—iy 2 438.734 P 8.90 37.15 iy—oy 3p 2 P° —6s 2 S *3165.710 A 9 27.08 31.00 iy—iy

437.849 P 8.84 37.15 oy—oy UV 8

2127.467 A 4 27.08 32.91 iy—oy 4p

2 P°—5s 2 S

iy— 3p 2 P° —6d 2 D

2120.179 A 3 27.06 32.91 oy—oy UV 18 412.939 P 8.90 38.91

412.155 P 8.84 38.92 oy—iy UV 9 Vac

1368.571 P 27.08 36.14 iy—2y 4p 2P°—5d 2 D

1365.549 P 27.06 36.14 oy—iy UV 19

1368.573 P 27.08 36.14 1 y—1 y

*1722.534 A 6 19.88 27.08 2)4—iy 3d 2 D —4p 2 P° 1230.795 P 27.08 37.15 iy—oy 4p 2 P° —6s 2 S

1727.377 A 5 19.88 27.06 iy—oh UV 10 1228.349 P 27.06 37.15 oy—oy UV 20

*1722.534 A 6 19.88 27.08 1)4 1)4 1047.271 P 27.08 38.92 iy— 4p 2 P°—6d 2 D

1045.500 P 27.06 38.92 oy—iy UV 21

1066.629 A 8 19.88 31.51 3d 2 D —4/ 2 F°

UV 11 ! 1

B14 iv—
Multiplet Table

Si IV

Continued Si IV

Continued

E P E P

I A Ref Int J Multiplet I A Ref Int J Multiplet

No. No.

Low High Low High

Air Air

*3762.435 A 8 31.00 34.29 2K—iy 4d 2 D —5p 2 P° 4628.62 A 3 H 36.42 39.09 5/ 2 F° —0hm°

3773.151 A 6 31.00 34.28 iy—oy 3 6.01 F

*3762.435 A 8 31.00 34.29 1/2—1/2 2971.522 A lh 36.42 40.59 5/ 2 F° —7d 2 D

2287.041 A 5h 31.00 36.42 4d J D —5/ 2 F° UV 33

UV 22

Vac 2895.131 A 3hl 36.42 40.70 5/ 2 F° —7g 2 G

1796.162 P 31.00 37.90 2)4—1/4 4d

2 D —6p2 P° UV 34

1797.496 P 31.00 37.89 iy—oy UV 23

1796.166 P 31.00 37.90 iy2—iy2 2328.56 A 2H 36.42 41.74 5/ 2 F° —80 2 G

UV 35

1533.220 P 31.00 39.08 4d 2 D —6/ 2 F°

UV 24

4673.297 A 2h 36.43 39.08 5g 2 G —6/ 2 F°

Air 6.02

2675.249 A 4 31.51 36.14 3/2—2^ 4/ 2 F° —5d 2 D

*2675.120 A 4 31.51 36.14 2/2— UV 25 4656.92 A 3 H 36.43 39.09 5g

J G —6g3 G

6.03F

2517.506 A 7 31.51 36.43 4/ 2F° —5<7 2 G

UV 26 4654.323 A 10hs 36.43 39.09 5g 2 G —6h 2 H°

Vac

1672.612 P 31.51 38.92 4/ 2 F° —6d 2 D

7

UV 27 2904.470 A 2h 36.43 40.70 5g 2 G —7h 2H°

UV 36

1634.607 A 1 31.51 39.09 4/ 2 F° —0g 2 G

UV 28

4411.652 A Oh 37.15 39.96 oy—1/2 oy—oy

6s 2 S —7p

2 P°

8

Air

m4416.506 P O 11 37.15 39.96

8957.245 A 2h 32.91 34.29 oy2—iy2 5s 2 S —5p

2 P°

9018.162 A 1 h 32.91 34.28 oy—oy 3.01 7654.555 A 4/i 37.90 39.52 iy—oy 6p 2 P° —7s 2 S

7630.497 A 2h 37.89 39.52 oy—oy 9 2482.816 A 2 32.91 37.90 oy2—1)4 5s 2 S —6p

2 P°

2485.378 A 1 32.91 37.89 oy2—oy2 UV 29 4611.27 A Oh 37.90 40.59 iy— 6p 2 P° —7d 2 D

m4602.578 P O 11 37.89 40.59 0y—iy 10

*6701.207 A 7 34.29 36.14 iy—2y 5p

2 P° —5d 2 D 4038.057 A 2h 37.90 40.97 1 /2—oy Op 2 P°—8s 2 S

6667.556 A 5 34.28 36.14 oy—iy 3.02 4031.39 A lh* 37.89 40.97 oy—oy 11 *6701.207 A 7 34.29 36.14 iy2—iy2 4328.175 A 5 34.29 37.15 iy2—oy2 5p

2 P° —6s 2 S 6998.358 A 3h 38.92 40.69 6d2 D—7/ 3 F°

4314.104 A 3 34.28 37.15 oy2—oy 4 12

2677.57 A 1* 34.29 38.92 1)4— 5p

2 P° —6d 2 D 5304.971 A 2h 38.92 41.26 —iy 6d 2 D —8p

2 P°

2672.193 A 1 34.28 38.92 oy2—iy2 UV 30 5309.493 A lh 38.92 41.25 iy—oy 13

2370.985 A 3 34.29 39.52 iy—oy 5p 2 P° —7s 2 S 4403.734 A 2hi 38.92 41.73 6d

2 D—8/ J F°

2366.755 A 2 34.28 39.52 oy2—oy2 UV 31 14

*7047.939 A 6h 36.14 37.90 2y2—iy2 5d

2 D —6p2 P° 8240.606 A lh 39.08 40.59 Of 2 F°—

7

d 2 D

7068.410 A 4h 36.14 37.89 iy2—oy2 4.01 15

*7047.939 A 6h 36.14 37.90 iy i )4 7678.748 A m 39.08 40.70 1b- O

O CD M

1 4212.407 A 7hi 36.14 39.08 5d 2 D —6/ 2 F° 16

5 4667.14 A 1 H 39.08 41.74 6/ 2 F°—

8

g

2 G

m3241.583

3244.192

P Si in

1 h

36.14

36.14

39.96

39.96

2/2—iy2 iy2—oy2 5d

2 D —7p

2 P°

5.01 17 A

m3241.572 P Si hi 36.14 39.96 iy2—iy2 7752.905 A lh 39.09 40.69 6g

2 G—7/ 2 F°

2723.812 A 3h 36.14 40.69 5d 2 D —7/ 2 F° 18

UV 32 7718.785 A 5hl 39.09 40.70 6g

2 G—7h 2 H°

19

4950.105 A 3 36.42 38.92 5/ 2 F° —6d 2 D

5.02 7730.469 A lh 39.09 40.70 Oh 2 H°

7

g

2 G

20

4647.45 A 1 hi 36.42 39.08 5/ 2 F° —6/2F 0 7725.64 A 2 H 39.09 40.70 Oh 2 H°—

7

h

2 H°

5.03F 21 F

4631.241 A m 36.42 39.09 5/ 2 F° —60 2 G 7723.818 A Ohs 39.09 40.70 Oh 2 H°—

7

i

2 I 6 22

B14 iv-2

U.S. GOVERNMENT PRINTING OFFICE: 1965 O—741-082