A111D2 IMblbl

mbs

NAT'L INST OF STANDARDS & TECH R.I.C.

JBucatiqNs

A1 1102146161

/NSRDS-NBS

QC100 .U573 V3;8;1979 C.2 NBS-PUB-C 1964 NSRDS-NBS 3, Section 8

U.S. DEPARTMENT OF COMMERCE /

National Bureau of Standards

,U573

110.3-8

1979

C.2

»» l Sf4»,

NSRDS

*e*C£

Selected Tables

of Atomic Spectra

Atomic Energy Levels and Multiplet Tables

0 vi, 0 vii, 0 vim
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards 1 was established by an act of Congress March 3, 1901. The

Bureau’s overall goal is to strengthen and advance the Nation’s science and technology and

facilitate their effective application for public benefit. To this end, the Bureau conducts

research and provides: (1) a basis for the Nation’s physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau’s technical work is performed by the National Measurement Laboratory, the National Engineering Laboratory,

and the Institute for Computer Sciences and Technology.

THE NATIONAL MEASUREMENT LABORATORY provides the national system of

physical and chemical and materials measurement; coordinates the system with measurement

systems of other nations and furnishes essential services leading to accurate and uniform

physical and chemical measurement throughout the Nation’s scientific community, industry,

and commerce; conducts materials research leading to improved methods of measurement,

standards, and data on the properties of materials needed by industry, commerce, educational

institutions, and Government; provides advisory and research services to other Government

Agencies; develops, produces, and distributes Standard Reference Materials; and provides

calibration services. The Laboratory consists of the following centers:

Absolute Physical Quantities2 — Radiation Research — Thermodynamics and

Molecular Science — Analytical Chemistry — Materials Science.

THE NATIONAL ENGINEERING LABORATORY provides technology and technical

services to users in the public and private sectors to address national needs and to solve

national problems in the public interest; conducts research in engineering and applied science

in support of objectives in these efforts; builds and maintains competence in the necessary

disciplines required to carry out this research and technical service; develops engineering data

and measurement capabilities; provides engineering measurement traceability services; develops test methods and proposes engineering standards and code changes; develops and

proposes new engineering practices; and develops and improves mechanisms to transfer

results of its research to the utlimate user. The Laboratory consists of the following centers:

Applied Mathematics — Electronics and Electrical Engineering2 — Mechanical

Engineering and Process Technology2 — Building Technology — Fire Research —

Consumer Product Technology — Field Methods.

THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts

research and provides scientific and technical services to aid Federal Agencies in the selection,

acquisition, application, and use of computer technology to improve effectiveness and

economy in Government operations in accordance with Public Law 89-306 (40 U.S.C. 759),

relevant Executive Orders, and other directives; carries out this mission by managing the

Federal Information Processing Standards Program, developing Federal ADP standards

guidelines, and managing Federal participation in ADP voluntary standardization activities; provides scientific and technological advisory services and assistance to Federal Agencies; and

provides the technical foundation for computer-related policies of the Federal Government.

The Institute consists of the following divisions:

Systems and Software — Computer Systems Engineering — Information Technology.

'Headquarters and Laboratories at Gaithersburg, Maryland, unless otherwise noted; mailing address Washington, D.C. 20234.

2 Some divisions within the center are located at Boulder, Colorado, 80303.

The National Bureau of Standards was reorganized, effective April 9, 1978.
ttowai law a stmtm,

JAN 3 0 1979

Selected Tables of Atomic Spectra

A Atomic Energy Levels - Second Edition

B Multiplet Tables fm

0 VI, 0 VII, 0 Vlll

’

Data Derived from the Analyses of Optical Spectra

Charlotte E. Moore

Office of Standard Reference Data

National Bureau of Standards

Washington, D.C. 20234

U.S. Naval Research Laboratory

E. O. Hulbert Center for Space Research

Washington, D.C. 20375

U.S. DEPARTMENT OF COMMERCE, Juanita M. Kreps, Secretary

Dr. Sidney Harman, Under Secretary

Jordan J. Baruch, Assistant Secretary for Science and Technology

U

f NATIONAL BUREAU OF STANDARDS. Ernest Ambler, Director

Issued January 1979
Library of Congress Catalog Card Number: 64-60074

NSRDS-NBS 3, Section 8

Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.), 3, Sec. 8, 31 pages (Jan. 1979)

CODEN: NSRDAP

© 1979 by the Secretary of Commerce on Behalf of the United States Government

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 1979

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402

Stock No. 003-003-01964-0
Abstract

The present publication is the eighth section of a series being prepared in response to the need for a current revision of two sets of the author’s tables containing data on atomic spectra as derived from analyses of

optical spectra. As in the previous Sections, Part A contains the atomic energy levels and Part B the multiplet tables. Section 8 includes these data for 0 VI, 0 VII, 0 VIII, thereby completing the spectra of oxygen.

The form of presentation is described in detail in the text to Section 1.

Key words: Atomic energy levels, 0 VI-0 VIII; atomic spectra, 0 VI-0 VIII; multiplet tables, 0 VI-0 VIII; ox- ygen spectra, 0 VI-0 VIII; spectra, 0 VI-0 VIII; wavelengths, 0 VI-0 VIII.
Foreword

The National Standard Reference Data System provides access to the quantitative data of physical science, critically evaluated and compiled for convenience and readily accessible through a

variety of distribution channels. The System was established in 1963 by action of the President’s

Office of Science and Technology and the Federal Council for Science and Technology, and

responsibility to administer it was assigned to the National Bureau of Standards.

NSRDS receives advice and planning assistance from a Review Committee of the National

Research Council of the National Academy of Sciences-National Academy of Engineering. A number of Advisory Panels, each concerned with a single technical area, meet regularly to examine

major portions of the program, assign relative priorities, and identify specific key problems in

need of further attention. For selected specific topics, the Advisory Panels sponsor subpanels

which make detailed studies of users’ needs, the present state of knowledge, and existing data re- sources as a basis for recommending one or more data compilation activities. This assembly of

advisory services contributes greatly to the guidance of NSRDS activities. The System now includes a complex of data centers and other activities in academic insti- tutions and other laboratories. Components of the NSRDS produce compilations of critically

evaluated data, reviews of the state of quantitative knowledge in specialized areas, and computations of useful functions derived from standard reference data. The centers and projects also

establish criteria for evaluation and compilation of data and recommend improvements in ex- perimental techniques. They are normally associated with research in the relevant field. The technical scope of NSRDS is indicated by the categories of projects active or being

planned: nuclear properties, atomic and molecular properties, solid state properties, thermodynamic and transport properties, chemical kinetics, and colloid and surface properties.

Reliable data on the properties of matter and materials are a major foundation of scientific

and technical progress. Such important activities as basic scientific research, industrial quality control, development of new materials for building and other technologies, measuring and correcting

environmental pollution depend on quality reference data. In NSRDS, the Bureau’s responsibility

to support American science, industry, and commerce is vitally fulfilled.

Ernest Ambler, Director

IV
Preface

The present publication is the eighth section of a series that is being prepared 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. This Circular has been reprinted as NSRDS-NBS 35, Volumes I, II and III. The second set consists of two Multiplet Tables; one published in 1945 by the Princeton University Observatory, containing multiplets having 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. The Princeton Multiplet Table was reprinted in 1972 as NSRDS-NBS 40. The present series includes both sets of data, the energy levels and multiplet tables, as Parts A and B,

respectively, for selected spectra contained in Volume I of "Atomic Energy Levels." The sections are being

published at irregular intervals as revised analyses become available. A flexible paging permits the arrangement of the various sections by atomic number, regardless of the order in which the separate spectra are published. Section 1 includes three spectra of silicon, Z=14: Si II, Si III, Si IV. Section 2 contains similar

data for Si I. Section 3 covers all spectra of carbon, Z=6: C I, C II, C III, C IV, C V, C VI. Section 4 includes

the last four spectra of nitrogen, Z=7: N IV, N V, N VI, N VII. Section 5 completes the spectra of nitrogen,

N I, N II, N III. Section 6 contains the spectra of hydrogen, Z=l: H I, D, T. Section 7 contains the first spec- trum of oxygen, Z=8: 0 I. The present Section, 8, contains the last three spectra of oxygen, Z=8: 0 VI, O VII, 0 VIII. The form of presentation of the data is described in detail in the text of Section 1. All sections are ar- ranged identically, and the same conversion factor, cm' 1 to eV, 0.000123981 is used throughout.

The manuscript has been prepared by Charlotte E. Moore, who published the earlier tables. She appreciates the cordial cooperation of numerous atomic spectroscopists. She is particularly indebted to B. Edlen

and I. Martinson in Lund, Sweden, W. C. Martin and V. Kaufman in the Spectroscopy Section of this Bureau, and to D. R. Lide and his staff for their cordial collaboration in publishing this material.

Washington, D. C., June 1978.

V
? A
Contents

Page Abstract Ill Foreword IV

Preface V

Part A—Atomic Energy Levels

Element: Z Spectrum

Oxygen: 8

0 VI A8VI-1 to A8VI-3

0 VII A8 VII-1 to A8 VII- 3

0 VIII A8 VIII - 1 to A8 VIII- 2

Part B—Multiplet Tables

Element: Z Spectrum

Oxygen: 8

0 VI B8 VI-1 to B8 VI-4

0 vii B8 vii-1 to B8 vii- 3

0 VIII B8 VIII- 1 to B8 VIII3

VII
.

-

-
NSRDS-NBS 3, SECTION 8

OXYGEN Z=H

A 0 VI Atomic Energy Levels

B 0 VI Multiplet Table

Atomic Energy Levels

Part A OXYGEN

Ovi

Li I sequence; 3 electrons Z = 8

Ground state Is

2 2s

2 S0i /2

2s 2 S0l/2 1114010 cm' 1 ; 89.766 A (Vac) I F 138.1 16 eV

The analysis by Edlen published in "Atomic Energy Levels” is essentially unchanged. From additional

observations by various authors it has been extended and slightly revised with regard to calculated wavelengths.

The present list of energy levels has been derived from a square array based on the 1974 analysis and

extended by means of a current list of classified lines compiled from the literature. The limit is from the

1963 paper by Bockasten, Hallin, and Hughes.

The observations are not homogeneous, and predicted wavelengths are subject to considerable error. The

extrapolated levels by Edlen, entered in brackets in the earlier list, have been adjusted in some cases to con- form to the present array of energy levels. This may not be an improvement, but it provides a self-contained

summary that includes the present observations.

Some special comments on individual papers should be noted. The resonance lines have been measured

by Ryabtsev at: AA 1031.924±0.005 and 1037. 614±0.005 A. Three lines reported by Pospieszczyk are not entered in part B: AA 21.63, 21.66, and-21.70 A. They are classified as Is

2 rc/2 L-ls 2p2 2 (L±1). Similarly,

three lines listed by Matthews and his associates have been omitted from the Mult iplet Table:

A(A) Designation

15.572 Is 3s

2 2 S — 3s 2 4p2 P°

16.350 Is 3p

2 — 3P3

18.092 Is

2 3s — Is 3s 4p

More observations are needed to connect the designated levels with the known levels. Gabriel and Jordan have observed a number of 0 VI lines in laboratory plasmas as long wavelength satellites to.the He-like ion resonance lines. The observations reported by Pegg and others on "Electron Decay-in-Flight Spectra, etc.' have not been

included here. Classifications in the "Spectra of Autoionization Electrons, etc.” bv Berry and others have

also been omitted.

The assignment of higher limit terms in the list of energy levels is somewhat arbitrary and ma\ require

revision.

An effort has been made to indicate the present interpretation of the spectrum by various authors, including term designations in some cases where only general configuration assignments have meaning. As work

goes on, a more suitable format can doubtless be developed.

Note added in press: The 1978 reference on "The Quartet Term System of Doubly Excited 0 VI.'

A8 VI1
Atomic Energy Levels

O VI

Contin ued

REFERENCES

B. Edlen, Zeit. Astroph. 7, 378-390 (1933). T, C L

B. Edlen, Nova Acta Reg. Soc. Sci. Uppsala [IV] 9, No. 6, 36-49 (1934), I P, T, C L

B. Edlen, unpublished material (Sept. 1947). T (See C. E. Moore, Atomic Energy Levels, Circ. Natl. Bur. Std. 467, 1, 58 (1949). I P, T

K. Bockasten, R. Hallin, and T. P. Hughes, Proc. Phys. Soc. (London) 81, 522-530 (1963). I P, C L

N. J. Peacock, Proc. Phys. Soc. (London) 84, 803-805 (1964). C L

A. H. Gabriel and C. Jordan, Nature 221, 947-949 (1969). C L H.G. Berry, Phys. Rev. A 6, No. 1, 514-516 (1972). T

J. P. Buchet, M. C. Buchet-Poulizac, G. DoCao, and J. Desesquelles, Nuclear Instr. and Methods 110, 19-25 (1973). C L

R. Hallin, J. Lindskog, A. Maurelius, J. Pihl, and R. Sjodin, Phvsica Scripta 8, 209-217 (1973). C L

D. L. Matthews, W. J. Braithwaite, H. H. Wolter, and C. F. Moore, Phys. Rev. A 8, No. 3, 1397-1402 (1973). C L

D. J. Pegg, I. A. Sellin, R. Peterson, J. R. Mowat, W. W. Smith, M. D. Brown, J. R. MacDonald, Phys. Rev. A 8, No. 3, 1350-1364 (1973). CL

B. Edlen, Phvsica Scripta 11, 366-370 (1975). C L

A. Pospieszczyk, Astron. and Astroph. 30, 357-370 (1975). C L

A. N. Ryabtsev, Astron. J. (USSR) 1, No. 9, 40-41 (1975). C L

E. J. Knystautas and R. Drouin, J. Phys. B: Atom. Molec. Phys. 8, No. 12, 2001-2006 (1975). C L

J. P. Buchet, A. Denis, J. Desesquelles, M. Druetta, and J. L. Subtil, Beam-Foil Spectroscopy 1, 355-365 (1976). C L

F. Hannebauer, H. V. Buttlar, and P. H. Heckmann, Phvsica Scripta 17, 479-482 (1978). T, C L

O vi O vi

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

Is

2 2s 2s 2 S o* 0.0 Is

2 6d 6J 2 D H 1004170

14 21 1004184

Is

2 2p 2p 2 P° o* 96375.0

532.5 H 96907.5

Is

2 6/ 6/ 2 F°

j 21

31 J [1004265]

Is

2 3s 3s 2 S 0} 640039.8

Is

2 6g etc. 6g

2 G 31

Is

2 3p Sp 2 P° 01 666113.2

156.6

to > [1004276]

H 666269.8 6h

2 H° 51

Is

2 M 3<f2 D H 674625.7

51.1

Is

2 7s etc. 7s

2 S 01 1030780

Is

2 4s 4s2 S

21

01

674676.8

852696

Is

2 7p

Ip 2 P°

| 01J 1032630 H

Is

2 4p 4p

2 P° 01 863333.8

63.9

Is

2 Id 7d 2 D 11 1033310

24 H 863397.7 21 1033334

Is

2 4d 4d 2 D 1121

866880.1 866901.5

21.4 Is

2 7/ 7/2 F°

j 21

31 [ [1033382]

Is

2 4/ 4/ 2 F° 21 867077.7

9.3

Is

2 Ig etc. 7

g

2 C 31

\ 31 867087.0 Ih 2 H° to >[1033389]

7i

2

1 61 J

Is

2 5s 5s

2 S 01

01H

948690

Is

2 8s 8s 2 S 01 [1050543]

Is

2 5p 5p

2 P°

| [ 954080

Is

2 8p 8p

2 P°

j 01H J 1051724

Is

2 5d 5d 2 D H 955851 Q 21 955860

Is

2 8/ 8/2 F°

| 21

31 |

[1052280]

Is

2 5/ etc. 5/

2 F° 21

to > 955985 Is

2 % etc. %2 G 31 \

5g

2 G 41 ) 8h2 H°

8,

2

I to M 1052285]

Is

2 6s 6s 2 S 01 1000080 81 2 K° 71 J

Is

2 6p 6p

2 P°

{ 01

j- 1003130

Is

2 8d &f 2 D U 1052288

13 11 ) 21 1052301

A8 vi-2
Atomic Energy Levels

() VI

Continued O VI

Continued

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

Is

2 9p 9p

2 P°

j

01U

j- 1064793 b 2p

2 2p

2 2 P 01H |

4643820

Is

2 9h etc. 9h 2 H° 41

\ ls2P

2 2p 22 S 01 4696550

9i 21 to >[1065207]

9k 2 K° 71 ) b 2s 3s 2s 3s 4 S H 5129900

Is

2 9d 9d 2 D 11 1065311

26 b 2s 3d 2s 3(7

4 D 01

21 1065337 to^

1 > 5182010

Is

2

1 Orf 10(7

2 D H

21 1074425 Is 2d 3d 2(7 3(7

4 D 01 i to > 5197910

Is

2 10/i etc. 10h

2 H° 41 \ 31 )

2

I to >[1074532]

2 K° 71 J Is 2p 3s 2p 3s

4 P° 01

) to > [5202760]

b

2 lOp 10/>

2 P°

j 01

11 f [1074922] 21 )

Is 2s 4<7 2s 4<7

4 D 01

) b

2 11(7 1 \d 2 D H

to > 5214870

21 1081451 31 )

b

2 12/t etc. 12h

2 H° 41 [1086514] b 2p 3d 2p 3(7

2 D° 11

i 5254130

etc. etc. 21

Is 2p 3d 2p 3(7

4 D° 01

to > [5254360]

0 VII (

l S0 ) Limit 1114010 31 J

b 2s (3 S) 2p 2

p

4 P° 01 Is 2p 3(7 2p 3(7

4 P° 01

> [5260970] 11 > 4470270 H

21 f 21 ;

b 2s (3 S) 2p 2p

2 P° 01

1^ |

4537620

Is 2p('P°)3p 2p 3p

2 D 11 21 ^ 5272390

2p" 2 P°

Is 2p('?°)3p 2p 3p

2 S 01 5272390

\s2s('S)2p 01

j- 4541330

11 Is 2p 4(7 2p 4(7

4 D° 01

\

to >[5450280]

b 2p2 2p

2 4 P 01 31

11 >[4575010]

2s 8p

4 P° 01 21 Is 2s 8p \ H >[5450280]

b 2p fT0

) 2s 2p 2s 2 P° 01

11 [ 4582950

2i /

Is 2s 9p

2s 9p

4 P° 01

\ b 2p('P°)2s 2p 2s'

2 P° 01H [ 4591370

H

21

>[5490 170]

Is 2

p

1 2p

22 D H

^ 4617530 2

P

3 2p

3 2 P° 01

f 9732880

21 11 1

June 1978.

A8 VI-3
.

-

,
Multiple! Table

Part B OXYGEN

0 vi (Z=8)

I P 138.1 16 eV Limit 1114010 cm-' 89.766 A (Vac)

Anal A List A June 1978

REFERENCES

A B. Edl6n, Physica Scripta 11, 366-370 (1975. C L, I; W L 93 A-173A.

B B. Edl£n, Nova Acta Reg. Soc. Sci. Uppsala [IV] 9, No. 6, 36-49 (1934), and unpublished material, July 1978. T, C L, I; W L

104 A-3834 A.

C K. Bockasten, R. H all in, and T. P. Hughes, Proc. Phys. Soc. (London) 81, 522-530 (1963). IP,CL,I;WL103lA -5290 A .

D D. L. Matthews, W. J. Braithwaite, H. H. Wolter, and C. F. Moore, Phys. Rev. A 8, No. 3, 1397-1402 (1973). C L

E R. Halllin, J. Lindskog, A. Marelius, J. Pihl, and R. Sjodin, Physica Scripta 8, 209-217 (1973). C L; W L 2428 A-4692 A.

F B. Edl6n, Zeit. Astroph. 7, 378-390 (1933). T, C L; [W L] 33 1 4 A-5602A.

G A. Pospieszczyk, Astron. and Astroph. 30, 357-370 (1975). C L; W L 21 A-22 A.

H N. J. Peacock, Proc. Phys. Soc. (London)84, 803-805 (1964). C L, I; W L 93 A-150 A.

I J. P. Buchet, M. C. Buchet-Poulizac, G. DoCao and J. Desesquelles, Nuclear Instr. and Methods, 110, 19-25 (1973). C L; W L

115 A-1125 A.

J E. J. Knystautas and R. Drouin, J. Phys. B: Atom. Molec. Phys. 8, No. 12, 2001-2006 (1975). C L, (I); W L 109 A - 193 A.

K J. P. Buchet, A. Denis, J. Desesquelles, M. Druetta, and J. L. Subtil, Beam-Foil Spectroscopy 1, 355-365 (1976). C L; W L

114 A — 1 59 A.

P Predicted wavelength

[P] A theoretical value of either or both energy levels of the transition has been used in deriving the predicted wavelength.

$ Raie Ultime

* and § Blend of 0 VI and 0 VI!

B8 VI- I
Multiplot Table

O vi O vi

I A Ref Int E P J Multiplet No. 1 A Ref Int E P J Multiplet No. Low High Low High

Vac Vac

1031.928+ B 10 0.00 12.01 01 -H 2s 2 S-2p 2 P° 116.421 A 7d 12.01 118.51 U-21 2p

2 P°-5d 2 D

1037.618 B 9 0.00 11.95 01 -0* UV 1 116.350 A 6d 11.95 118.51 oi-ii UV 7

150.089 A 13 0.00 82.60 oi-H 2s 2 S-3p 2 P° 110.721 A 2 12.01 123.99 il-oi 2p

2 P°-6s 2 S

150.124 A 12 0.00 82.59 oi -01 UV 2 110.655 A 1 11.95 123.99 0! -o* UV 8

148.218 A Id 0.00 83.65 01 -21 2s 2 S-3d 2 D 110.220 A 5d 12.01 124.50 1 i -21 2p

2 P°-6d 2 D

UV IF 110.157 A 4d 11.95 124.50 0i -IT UV 9

115.822 A 9 0.00 107.04 01-11 2s 2 S-4p 2 P° 107.081 A 1 12.01 127.80 H-oi 2p

2 P°-7s 2 S

115.830 A 8 0.00 107.04 01 -01 UV 2.01 UV 10

104.813 A 7 0.00 118.29 01- 2s 2 S-5p 2 P° 106.789 A 4d 12.01 128.11 U-21 2p 2 P°-7d 2 D

UV 2.02 106.731 A 3d 11.95 128.11 Oi-H UV 11

99.688 A 5d 0.00 124.37 01- 2s 2 S-6p 2 P° [104.862] P 12.01 130.25 11-01 2p

2 P°-8s 2 S UV 2.03 UV 12

96.840 A 4d 0.00 128.03 01- 2s 2 S-7p 2 P° 104.669 A 3d 12.01 130.47 11-21 2p

2 P°-8d 2 D

UV 2.04 104.612 A 2d 11.95 130.46 oi -h UV 13

95.082 A M 0.00 130.39 01- 2s 2 S-8p 2 P° 103.260 A 2d 12.01 132.08 U-21 2p

2 P°-9d 2 D

UV 2.05 103.206 A 1 d 11.95 132.08 01 -H UV 14

93.915 A 2d 0.00 132.01 01- 2s 2 S-9p 2 P° 102.30 H 3 12.01 133.21 11-21 2p

2 P°-10d2 D

UV 2.06 UV 15

93.03 H 2 0.00 133.27 01- 2s 2 S - 1 0/>

2 P° 101.57 H 2 12.01 134.08 11-21 2p

2 P°-1 ld2 D

UV 2.07 UV 16

22.370 D 0.00 554.23 01- 2s 2 S-2\P

' 4 P° 22.33 P 11.99 567.21 2

p

2 P°-2

p

2 4 P UV 2.08 UV 17

22.038 D 0.00 562.58 01- 2s 2 S-2p' 2 P° 22.12 G 11.99 572.49 2p

2 P°-2p

2 2 D

UV 2.09 UV 18

22.02 G 0.00 563.04 01- 2s 2 S-2p" 2 P° 21.74 G 11.99 582.28 -01 2p 2 P°-2p

2 2 S UV 2.10 UV 19

21.82 G 0.00 568.20 01- 2s 2 S-2p 2s 2 P° UV 2.11 Air 3811.35 B 2 79.35 82.60 01-11 3s 2 S-3p

2 P°

21.78 G 0.00 569.24 01- 2s 2 S-2p2s' 2 P° 3834.24 B 1 79.35 82.59 01 -01 1 UV 2.12 Vac

447.712 B 0 79.35 107.04 01-11 3s 2 S-4p 2 P°

184.117 A 10 12.01 79.35 11 -01 2p

2 P°-3s 2 S 447.840 B 0 - 79.35 107.04 01 -01 UV 20

183.937 A 9 11.95 79.35 01 -01 UV 3

173.082 A 14 12.01 83.65 11-21 2p

2 P°-3d 2 D 498.431 B Id 82.60 107.48 U-21 3p

2 P°-4d 2 D

172.935 A 13 11.95 83.64 01-11 UV 4 498.090 B 0d 82.59 107.48 01-11 UV 21

132.312 A 6 12.01 105.72 11-01 2p

2 P°-4s 2 S 21.71 G 82.60 653.68 3p

2 P°-2p 3p

2 D

132.219 A 5 11.95 105.72 01 -01 UV 4.01 UV 22

129.871 A 11 12.01 107.48 11-21 2p

2 P°-4d 2 D

129.785 A 10 11.95 107.48 01-11 UV 5 519.723 B 2+d 83.65 107.50 21 -31 3d 2 D-4/ 2 F° 519.610 B 2d 83.64 107.50 11-21 UV 23

117.401 A 3 12.01 117.62 11-01 2p

2 P°-5s 2 S

117.327 A 2 11.95 117.62 01 -01 UV 6 1125 I 107.48 118.52 4d 2 D-5/ 2 F°

116.666 A 1 12.01 118.29 H- 2p

2 P°-5p 2 P° 107.50 118.52 4/ 2 F°-5p 2 G

UV 2F UV 24

B8 vi-2
Multiple! Table

() VI

Continued O VI —(-out in tied

I A Ref Int E P

J Multiplet No. Ref Ini

E P

J Multiplet No. Low High

1 A

Low High

Vac Air 729 I 107.48 124.51 \d 2 D-6/ 2 F° [5274] P 128.11 130.46 7rf

2 D-8/ 2 F°

107.50 124.51 4/ 2 F°-6g 2 G 13 UV 25

601 I 107.48 128.12 4rf

2 D-7/ 2 F° [5289] P 128.12 130.46 7/ 2 F°-8g

2 C

107.50 128.12 4/

2 F°-7g 2 G 14 UV 26

[5286] P 128.12 130.47 7/

2 F°-8rf 2 D

15 Air 2069.92 C 5 118.52 124.51 5/ 2 F°-6g 2 C

2070.29 C 4 118.52 124.51 5g

2 G-6h 2 H° 5290.60 C 5 128.12 130.46 7g

2 G -8h

2 H°

UV 27 7h 2 H°-8f 2I 7t

2

I -8k 2 K°

16 3071 P 123.99 128.03 0|- 6s 2 S-7p 2 P°

2 3142 E 128.12 132.07 7g 2 G-9/t 2 H°

etc. -etc.

3616 P 124.37 127.80 -o* 6g 2 P°-7s 2 S

17

3 2428 E 128.12 133.22 7g 2 G - 1 0/i

2 H°

etc. -etc. 3311 P 124.37 128.11 6p

2 P°-7<i 2 D

4 UV 29

3514 P 124.50 128.03 6d 2 D-7p 2 P° 4500 E 130.46 133.22 8g

2 G- 1 0/i2 H°

5 etc. -etc. 18 [3423] P 124.50 128.12 6d 2 D-7/ 2 F°

6 4692 E 132.07 134.71 9g 2 G-12A 2 H°

etc. -etc. [3440] P 124.51 128.11 6f

2 F°-7d 2 D

7

19

Vac

3433.69 C 5 124.51 128.12 6/' 2 F°-7g 2 G 151.6 K 554.23 636.01 2p

J P°-2s 3s ‘S 6g

2 G-7h 2 H°

6h

2 H°-7; 2

1 UV 30

8 140.5 K 554.23 642.47 Ip'

j P°-2j SJ-D

UV 31 2082.18 C 2 124.51 130.46 6/

2 F°-8g 2 G

6g

2 G-8h 2 H° * 137.43§ J (80) 554.23 644.44 ‘Ip 6h

2 H°-8( 2

I UV 32 UV 28

134.3 J (30) 554.23 646.54 2p

4 P°-2s 4</

4 D UV 33 4773 P 127.80 130.39 01- Is

2 S-8p

2 P°

9

159.3 K 567.21 645.04 2p

2 4 P-^> 3s

4 P° UV 34

[5581] P 128.03 130.25 -0i Ip 2 P°-8s 2 S

10 147.2 K 567.21 651.44 2p

24 P->3rf 4 D° UV 35 5084 P 128.03 130.47 7P

2 ?°-8d 2 D

11 145.78 J (160) 567.21 652.26 V

4 P-2p8d‘?c UV 36

5433 P 128.11 130.39 7d 2 D-8g 2 P° * 1 14.25§ J (50) 567.21 675.73 2p

2, P-2p W 4 D°

12 UV 37

B8 vi3
Multiplet Table

Ovi—Continued Ovi—Continued

B8 vi-4
NSRDS-NBS 3, SECTION 8

OXYGEN Z=8

A 0 VII Atomic Energy Levels

B 0 VII Multiplet Table

Atomic Energy Levels

Part A OXYGEN

O vii

He I sequence; 2 electrons Z = 8

Ground state Is

2 ‘So

Is

2 'S„ 5962800 ±300 cm* 1 ; 16.771 A (Vac) I P 739.274±0.037 eV

The observations are from various sources, hut the analysis is confirmed by theory. A. M. Cantu and his associates have extended the early work of Tyren and Edlen in the grazing-incidence region bv "Focusing

a Q-switched 1-GW ruby laser on a solid target and detecting the emitted radiation.” From these observations they derive the ionization limit quoted above, which agrees well with Tyren’s early value 5963000±600

cm" 1. The writer has prepared a line list from the wavelengths quoted in Part B and derived the tabulated

energy levels from a square array of combinations based on this list. Except for three lines near 1600 A, the

line list extends from 137 A to 15 A. Most energy levels might well be listed to fewer significant figures. In the paper by Cantu and others a probable error of 0.007 A is given for most of their observed lines. The

data are not homogeneous but provide a general summary of the analysis.

Brackets denote calculated energy levels. The entries for the terms np 3 P°(n = 8-10) and 1 0c/

! D are from

calculated wavelengths listed by Fawcett. The values for the terms nd 3 D(rc = 4- 10) have been determined

from combinations with 2p

3 P° by using the center of gravity, 4585980 cm" 1 , for this term. The levels above the ionization limit involve two-electron excitation. They are based on the observations

between 15 A and 19 A reported by Matthews and his associates. One line, 19.069 A, cl assified by these

authors as Is 3p—2p 3p

has not been utilized in the present compilation, pending further clarification. The

term that they designate as 2p

2 'P is entered here as 2p2 'D. Hallin and others have reported eight lines of O VII between 2306 A and 4562 A observed in beam-foil

spectra of oxygen ions at beam energies of 6-42 MeV. They define these lines by the principal quantum

numbers n and n as follows:

A(A)exp n n' A(A)exp n n

* 2522 6 7 * 2522 8 11

3892 7 8 * 4562 9 11

2306 7 9 3435 9 12

3308 8 10 * 4562 10 13

* Blend

A8 VII1
O VII

Continued

The agreement between the observed and their quoted theoretical wavelengths for these lines is good.

In their 1976 paper, Buchet and others report some of these observed hydrogenic transitions and two lines

at A 2562 A and A 2452 A which they designate as having the respective transitions 6d-7p and 6p-ld.

Accad, Pekeris, and Schiff have published theoretical wavelengths for the transitions 2s

J S -np

3 P° (n = 3

to 5) and, also, find satisfactory agreement with experimental values.

Buchet and his associates report the following new lines excited by the beam-foil technique "at an energy

of 1.15 MeV/nucleon”.

A (A) Transition

382 Is 3r/-ls 4/

442 Is 4/- Is 7g

535 Is 4/- Is 6g

826 Is 4/-1 s 5g

949 Is 5g-ls Ih

REFERENCES

F. Tyren, Nova Acta Reg. Soc. Sci. Uppsala [IV] 12 , No. 1, 25-26 (1940). I P, T, C L

B. Edlen, Ark. Fys. 4 , No. 28, 441-453 (1952). I P, T, C L

B. C. Fawcett, F. E. Irons, Proc. Phys. Soc. 89 , 1063-1064L (1966). C L

Y. Accad, C. L. Pekeris, and B. Schiff, Phys. Rev. 183 , No. 1, 78-80 (1969). T, C L

L. A. Svensson, Phys. Scripta 1, 246 (1970). C L W. Engelhardt and J. Sommer, Astroph. J. 167, 201-202 (1971). C L

A. H. Gabriel, Mon. Not. Roy. Astron. Soc. 160, 99-1 19 (1972). C L

R. Hallin, J. Lindskog, A. Marelius, J. Pihl, and R. Sjodin, Physica Scripta, 8, 209-217 (1973). C L

D. L. Matthews, W. J. Braithwaite, H. H. Wolter, and C. F. Moore, Phys. Rev. A 8, No. 3, 1397-1402 (1973). C L

D. J. Pegg, P. M. Griffin, H. H. Haselton, R. Laubert, J. R. Mowat, R. S. Thoe, R. S. Peterson, and I. A. Sellin, Phys. Rev. A 10 , No. 3, 745-748(1974). CL

A. M. Cantu, E. Jannitti, and G. Tondello, J. Opt. Soc. Am. 64 , No. 5, 699-701 (1974). I P, C L

J. P. Buchet, M. C. Buchet-Poulizac, and J. Desesquelles, Nuclear Instr. and Methods 110, 19-25 (1973). C L

E. J. Knystautas and R. Drouin, J. Phys. B: Atom. Molec. Phys. 8, No. 12, 2001-2006 (1975). C L

J. P. Buchet, A. Denis, J. Desesquelles, M. Druetta, and J. L. Subtil, Beam-Foil Spectroscopy 1, 355-365 (1976). C L

A8 VII-2
Atomic Energy Levels

Ovu Ovii

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

Is

2 Is

2 ‘S 0 0 Is 6p 6p 'P° 1 5813950

Is 2s 2s 3 S 1 4524640 Is 7p Ip 3 P° 0,1,2 5851890

Is 2p 2p

3 ?° 0

1

4585620

4585680 60

Is Ip Ip 'P° 1 5852740

2 4586230 550

Is Id Id 3 D 1,2,3 5853660

Is 2s 2s ‘S 0 4587340+x Is 8p 3p

3 P° 0,1,2 [5877800]

Is 2p 2p 'P° 1 4629200 Is 3d &7 3 D 1,2,3 5878400

Is 3s 3s 3 S 1 5338820 Is 9d 9rf

3 D 1,2,3 5892950

Is 3p 3p

3 P° 0.1,2 5355670 Is 9p 9p3 P° 0,1,2 [5894500]

Is 3s 3s ‘S 0 5356420 Is 10/) 10p

3 P° [5907800]

Is 3d 3d 3 D 12 5364370

5364430

60

10

Is lOef \0d 3 D 1,2,3, [5910500]

3 5364440 0 VIII fS0,/2 ) Limit 5962800

Is 3d 3d 'D 2 5365470 2P

1 2p

2 3 P 0,1,2 9745140

Is 3p 3p ‘P° 1 5368550 2p

2 2p

2 'D 2 9788360

Is 4s 4s 3 S 1 5616100 2

P

2 2p2 ‘S 0 9836180

Is 4p 4p

3 P° 0,1,2 5622600 2

'p 3

p

'P 1 10592230

Is 4d id 3 D 1,2,3 5626280 2s 2p

3pO

0,1,2 10593340

Is 4d id ‘D 2 5626670 2s 2p

i po

1 10593340+x

Is 4pip 'P° 1 5628100 2p 3p

3 P 10616980

Is 5p 5p

3 P° 0,1,2 5745440 2p 3d 3 D° 10620410

Is 5d 5d 3 D 1,2,3 5747420 2s ip

3pO 10873850

Is 5d .5rf'D 2 5748230 2

p

3p

3 D 1 1 508500+x

Is 5p 5p *P° 1 5748450 3P

2 3 P 11533850

Is 6p 6p

3 P° 0,1,2 5811730 3P 4p

3 P 11832770

Is 6d 6d 3 D 1,2,3 5813070 3P 4/) 'P 11845650

Is 6d 6d 'D 2 5813680

June 1978.

A8 VII-3
.
Multiple) Table

Part B OXYGEN

O vn (Z=H)

1 P 739.274±0.037 eV. Limit 5962800±300 cm" ' 16.771 A (Vac)

Anal B List A June 1978

REFERENCES

A A. M. Cant 6, E. Jannitti, and G. Tondello, J. Opt. Soc. Am. 64, No. 5, 699-701 (1974). I P, C L, I; W L 17 A to 135A

.

B D. L. Matthews, W. J. Braithwaite, H. H. Wolter, and C. F. Moore, Phys. Rev. A 8, No. 3, 1397-1402 (1973). C L; W L 15 A to 21 A

C L. A. Svensson, Phys. Seripta 1 , 246 (1970). W L, C L

D W. Englehardt and J. Sommer, Astroph. J. 167,201-202 (1971). C L; W L 1623 A to 1639A

E F. Tyr6n, Nova Acta Reg. Soc. Sci. Uppsala [IV] 12, No. 1 25-26 (1940). I P, T, C L; W L 17 A to 21 A

F B. Edl6n, Ark. Fvs.4, No. 28, 441-453 (1952). I P, T, C L, (I); W L 120 A to 128A

G B. C. Fawcett, F. E. Irons, Proc. Phys. Soc. 89, 1063-1064L (1966). C L; W L 72 A to 128.A

H A. H. Gabriel, Mon. Not. Roy. Astron. Soc. 160, 99-1 19 (1972). C L

I D. J. Pegg, P. M. Griffin, H. H. Haselton, R. Laubert, J. R. Mowat, R. S. Thoe, R. S. Peterson, and I. A. Sellin, Phys. Rev. 10. No.

3, 745-748 (1974). C L; W L 86 A to 137A

J E. J. Knystautas and R. Drouin, J. Phys. B: Atom. Molec. Phys. 8, No. 12, 2001-2006 (1975). C L, (I); W L 109 A - 137 A.

R. Hallin, J. Lindskog, A. Marelius, J. Pihl and R. Sjodin, Physica Seripta 8, 209-217 (1973). C L; WL 2306 A to 5670A

P Predicted Wavelength

£ Raie Ultime

* Blend

* and f Blend of 0 VII and Be III

* and § Blend of 0 VII and 0 VI

B8 vii1
Multiplet Table

O vii O vii

I A Ref Int E P

J Multiplet No. I A Ref Int E P J Multiplet No. Low High Low High

Vac Vac

22.10 H 0.00 560.97 0-1 Is

2 'S-2s 3 S 132.831 A 13 568.51 661.91 -1 2p

3 P°-3s 3 S

IF 19

21.807 A 3 0.00 568.54 0-1 Is

2 'S-2p 3 P° 128.500 F (0) 568.61 665.09 2-3 2p

3 P°-3d 3 D

1 *128.412 F (00) 568.54 665.09 1-2 20

*128.412 F (00) 568.53 665.08 0-1 21.6020+ C 0.00 573.93 0-1 Is

2 ‘S-2p 'P°

2 97.076 A 1 568.58 696.29 -1 2p

3 P°-4s 3 S

21

18.627 E 0.00 665.60 0-1 Is

2 ‘S-3p >P°

3 96.126 A 68 568.58 697.55 - 2p

3 P°-4<f 3 D

22

17.768 E 0.00 697.78 0-1 Is

2 ‘S-4p ‘P° 4 86.100 A 29 568.58 712.57 2p

3 P°-5d 3 D

23

17.396 E 0.00 712.70 0-1 Is

2 *S-5p ‘P°

5 81.494 A 10 568.58 720.71 2p

3 ?°-6d 3 D

24

17.200 E 0.00 720.82 0-1 h

2 'S-6p ’P°

6 78.884 A 4 568.58 725.74 2p

3 P°-ld 3 D

25

17.086 A 1 0.00 725.63 0-1 Is

2 ‘S-7p 'P° 7 77.374 A 1 568.58 728.81 2p

3 P°-8(f 3 D

26

76.513 A 1 568.58 730.61 2p

3 P°-9d 3 D

1623.63 D 560.97 568.61 1-2 2s 3 S-2p 3 P° 27

1638.30 D 560.97 568.54 1-1 8 1639.87 D 560.97 568.53 1-0 75.5 G P 568.58 732.79 2p

3 P°-10<f 3 D

28

120.333 A 66 560.97 664.00 1 - 2s 3 S-3p 3 P°

9 *19.383 B 568.58 1208 2p

3 P°-2p2 3 P

29

91.078 A 30 560.97 697.10 1 - 2s 3 S-4p 3 P°

10 16.581 B 568.58 1316 2p

3 P°-2p 3p

3 30

81.914 A 10 560.97 712.33 1 - 2s 3 S-5p 3 P°

11 16.650 B 568.74 1313 0-1 2s 'S-2s 2p *P

C

77.695 A 3 560.97 720.54 1 - 2s 3 S-6p 3 P° 31

12

75.344 A 2 560.97 725.52 1 - 2s 3 S-7p 3 P° 137.51 I 573.93 664.09 1-0 2p 'P°-3s ‘S 13 32

73.9 G P 560.97 728.74 1 - 2s 3 S-8p 3 P° 135.820 A 48 573.93 665.22 1-2 2p 'P°-M 'D

14 33

73.0 G P 560.97 730.81 1 - 2s 3 S-9p 3 P° *100.254f A 573.93 697.60 1-2 2p ‘P°-4<f 'D

15 34

72.3 G P 560.97 732.45 1 - 2s 3 S-10p 3 P° 89.363 A 10 573.93 712.67 1-2 2p 'P°-5d 'D

16 35

16.478 B 560.97 1313 1 - 2s 3 S-2s 2p

3 P° 84.425 A 1 573.93 720.79 1-2 2p 'P°-6d 'D

17 36

15.750 B 560.97 1348 1 - 2s 3 S-2s 4p

3 P° *19.383 B 573.93 1213 1-2 2p 'P°-2

p

1 'D

18 37

B8 vii-2
Multiplet Table

O VII —Continued () VII —Continued

I A Ref Int E P J Multiplet No. f A Ref Int E P

J Multiplet No. Low High Low High

Vac

19.205 B 573.93 1220 1-0 2p 'P°-2p

1 'S 38

Vac

*15.439 B 665.60 1469 1-1 .3p ‘P°-3p 4p 'P 42

16.770 B 573.93 1313 1-1 2p'P°-2p 3p 'P 39

* 1 14.25§ J 1208 1317 2p

13 P-2p 3d 3 D‘ 43

16.186 B 664.00 1430 ip 3 P°-3p 2 3 P

40

3p

3 P°-3p 4p3 P

41

*15.439 B 664.00 1467

* 109. 27§ J 1313 1427 2s 2p

3 P°-2p 3p

44

B8 V 1 1 -

3
* '
NSRDS-NBS 3, SECTION 8

OXYGEN Z=8

A 0 VIII Atomic Energy Levels

B 0 VIII Multiplet Table
«
Atomic Energy Levels

Part A OXYGEN

O viii

H I sequence; 1 electron Z = 8

Ground state Is

2 S0i/2

Is

2 So,/2 7028394 cm' 1 ; 14.228 A (Vac) 1 P 871.387 eV

In 1940, F. Tyren reported the Lyman line Is

2 S-2p2 P° as observed for the first time.

The terms in the table are those derived by J.D. Garcia and J.E. Mack as part of their extensive calculations of H-like spectra to Ca XX. Their values refer to the isotope 8 0 for which they used R— 109733.54530.

B. Edlen has, also, calculated centre-of-gravity wavelengths of the Lyman lines 1 s-np, n = 2 to 7, for the

natural isotope mixture, but the difference is negligible in the case of 0 VIII.

REFERENCES

F. Tyr£n, Nova Acta Reg. Soc. Sci. Uppsala [IV] 12, No. 1 , 24 (1940). C L

J. D. Garcia and J. E. Mack, J. Opt. Soc. Am. 55, No. 6, 654-685 (1965). I P. T, C L

B. Edlen, Ark. Fys. (Stockholm)31, No. 35, 509-510 (1966). C L

Ovm O viii

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

Is Is

2 S 0| 0 IP Ip 2 P° 01 6885005

2

7s 7s

2 S 01 6885007 33

2p 2p

2 P° 01 5270782 73 Ip, Id ld 2 D Ip 2 P° R 6885040

12

2s 2s 2 S 01 5270855 1429 ld,lf 7c/

2 D 7/

2 F° 21 6885052 5

2P 2p

2 P° H 5272284 7/,7g 7g

2 G 7/

2 F° 31 6885058

3 7g,7h 7g

2 G Ih 2 H° 41 6885061

2

3P 3p 2 P° 01 6247399

22

Ih, li li

2

I Ih 2 H° 51 6885063

2

3s 3s 2 S 01 6247421 423 li 7i

2

I 61 6885065

3p, 3d 3d 2 D 3p

2 P° H 6247844

148

3d 3d 2 D 21 6247992 8P

8p

2 P° 01 6918617

1 8s 8s 2 S 01 6918618 90

4P 4p

2 P° 01 6589154

10 8d 8d 2 D 11 6918640

| 4s 4s 2 S 01 6589164 178

8P 8p

2 P° li 6918641

4p, 4d 4d 2 D 4p

2 P° li 6589342 62 8d, 8/ 8d 2 D 8/

2 F° 2i 6918648 4 kLAf 4d 2 D 4/ 2 F° 21 6589404 32 8/,8g %

2 G 8/2 F° 3i 6918652

3 4/ 4/

2 F° 31 6589436 8g, 8h %

2 G 8h 2 H° 4i 6918655

1 8h,8i 8t 2

I 8h 2 H° 5i 6918656

J 5p 5p

2 P° 01 6747312 8i, 8k 8/

2

I 8k 2 K° 6i 6918657

1 5s 5s 2 S 01 6747317

91 8k 8k 2 K° 7i 6918658

5p,5d 5d 2 D 5p

2 P° li 6747408 32

5d, 5/ 5d 2 D 5/ 2 F° 21 6747440 16 9p 9p

2 P° 0i 694T660

1 5/, 5g 5

g

2 G 5/2 F° 31 6747456

10

9s 9s 2 S 01 6941661

15 5g 5g

2 G 41 6747466 9P ,9d 9d 2 D 9p

2 P° 11 6941676 6 9d,9f 9d 2 D 9/ 2 F° 21 6941682

3 6p bp 2 P° 01 6833214 Q 9f,9g 9g

2 G 9/2 F° 31 6941685

1 6s 6s 2 S 01 6833217 9g,9h 9g

2 G 9h2 H° 41 6941686

1 6p, 6d 6d 2 D bp 2 P° H 6833270

DO

1 ft 9h , 9i 9i

2

I 9h 2 H° 51 6941687

1 6d,6f 6d 2 D 6/ 2 F° 21 6833288 Q 9i, 9k 9i

2

I 9A2 K° 61 6941688

1 6/.6g 6g

2 G 6/

2 F° 31 6833297 6

9k, 91 9/ 2 L 9k 2 K° 71 6941689 0

6g, 6h 6g

2 G bh 2 H° 41 6833303 4

91 9/

2 L 81 6941689

bh 2 H° 51 6833307

A8 VIII1
Atomic Energy Levels

O VIII—Continued O VIII —Continued

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

10/) 10/)

2 P° 0* 6958141

1 15s, 15/) 15s 2 S 15/7

2 P° 01 6997173

10s 10s 2 S 01 6958142

1

1

etc. 141 to 80 7

10p, 10c/ 10c/

2 D 10/)

2 P° H 6958153

4

10c/, 10/ 10c/

2 D 10/ 2 F° 21 6958157

2

16s, 16p 16s 2 S 16/7

2 P° 01 7000954

10/ I0g 10g

2 G 10/ 2 F° 31 6958159

2

etc. 151 to 60 6

lOg, 10/) 10g

2 G 10h2 H° 41 6958161

0 10/ 10/ 10/ 2 I 10/)

2 H° 51 6958161

J 17s, 17/j 17s 2 S 17/)

2 P° 01 7004088

io/, m 10/ 2 I 101 2 K° 61 6958162

o

etc. 161 to 92 4

10k, 10/ 10/ 2 L

O o 71 6958162

10/, 10m 10/ 2 L 10m 2 M° 81 6958163

o

18s, 18/> 18s 2 S 18/7

2 P° 01 7006713 10m 10m 2 M° 91 6958163 etc. 171 to 17 4

11P 11p

2 P° 01 6970335

\ 19s, 19p 19s 2 S 19/)

2 P° 01 7008936

11s 11s

2 S 01 6970336

16

etc. 181 to 39 3

etc. 101 to 52

20s , 20p 20s 2 S 20p

2 P° 01 7010833

12s, 12p 12s 2 S 12/)

2 P° 01 6979610

12

etc. 191 to 36 3

etc. HI to 22

13s, 13/) 13s 2 S 1 3/)

2 P° 01 6986827

10

etc. 121 to 37 oo= Limit 7028394

14/) 14p

2 P° 01 6992553

1 14%s 14s 2 S 01 6992554

8

etc. 131 to 62

March 1971.
Multiplet Table

Part B OXYGEN

O VIII (Z = 8|

IP 871.387 eV Limit 7028394 crrr

1 14.228 A (Vac)

Anal A List B March 1971

REFERENCES

A J. D. Garcia and J. E. Mack, J. Opt. Soc. Am. 55, No. 6, 654 to 685 (1965). 1 P, T, C L; W L 14 A to 13865 A (all wavelengths are from theoretical calculations of H-like spectra. For unresolved groups the wavelength has been derived from "the wave number of the statistically-weighed mean of all components.”

B. Edlen, Ark. Fys. (Stockholm)31, No. 35, 509-510 (1966). C L.

O viii O viii

I A Ref Int E p

J Multiplet No. I A Ref Int E P J Multiplet No. Low High - Low High

Vac Vac

18.9671 A 0.00 653.66 0TB Is

2 S-2p 2 P° 14.2915 A 0.00 867.52 01- Is

2 S-15p 2 P°

18.9725 A 0.00 653.48 01-01 1 14

16.0055 A 0.00 774.61 0*-0i Is

2 S-3p

2 P° 14.2838 A 0.00 867.99 01- Is

2 S-16p 2 P°

16.0067 A 0.00 774.56 0{-0i 2 15

15.1760 A 0.00 816.95 oi-H Is

2 S-4/> 2 P° 14.2774 A 0.00 868.37 01- Is

2 S-17d2 P°

15.1765 A 0.00 816.93 0M- 1ON>|- 3 16

14.8205 A 0.00 836.55 OHi Is

2 S-5p

2 P° 14.2720 A 0.00 868.70 01- Is

2 S-18/> 2 P°

14.8207 A 0.00 836.54 oi-oi 4 17

14.6343 A 0.00 847.20 0 1 Is

2 S-6/j2 P° 14.2675 A 0.00 868.97 01- Is

2 S-19p 2 P°

14.6344 A 0.00 847.19 1OHn

-1 o n 5 18

14.5242 A 0.00 853.61 01-1 1 Is

2 S-7p 2 P° 14.2636 A 0.00 869.21 01- Is2 S-20p2 P°

14.5243 A 0.00 853.61 01-01 6 19

14.4537 A 0.00 857.78 01-11 Is

2 S-8p2 P°

14.4538 A 0.00 857.78 01-01 7 102.550 A 653.66 774.56 n-oi 2p

2 P°-3s 2 S

102.392 A 653.48 i < 4.56 01-01 20

14.4057 A 0.00 860.64 01-11 Is

2 S-9p 2 P°

14.4058 A 0.00 860.63 01-01 8 102.490 A 653.66 774.63 U-21 2p

2 P°-3c/ 2 D

102.348 A 653.48 774.61 oi-H 21 14.3716 A 0.00 862.68 01-11 Is

2 S-10p 2 P° 102.505 A 653.66 774.61 il-il

14.3717 A 0.00 862.68 01-01 9 75.937 A 653.66 816.93 11-01 2p 2 P°-4s 2 S

14.3465 A 0.00 864.19 01- ls

2 S-llp 2 P° 75.851 A 653.48 816.93 01-01 22

10 75.886 A 653.60 816.96 2p

2 P°-4</ 2 D

14.3274 A 0.00 865.34 01- Is

2 S-12p 2 P°

11

etc. 23 etc.

67.795 A 653.66 836.54 11-01 2p

2 P°-5s 2 S

14.3126 A 0.00 866.23 01- Is

2 S-13p 2 P° 67.726 A 653.48 836.54 01-01 24

12 67.758 A 653.60 836.55 2p

2 P°-5</ 2 D

14.3009 A 0.00 866.94 01- Is

2 S — 1 4/?2 P° etc. 25 etc. 13

B8 VIII
Multiplet Table

O VIII —Continued O VIII —Continued

I A Ref Int E P / Multiplet No. I A Ref Int E P J Multiplet No. Low High Low High

Vac Vac

64.064 A 653.66 847.19 ib-0b 2p

2 P°-6s 2 S 75.845 A 653.49 816.95 Ob-lb 2s 2 S-4p 2 P°

64.003 A 653.48 847.19 0i-0j 26 75.855 A 653.49 816.93 0b-0b 47

64.032 A 653.60 847.20 2p

2 P°-6d 2 D 67.725 A 653.49 836.55 Ob-H 2s 2 S-5p 2 P°

etc. 27 etc. 67.730 A 653.49 836.54 0b-0b 48

62.007 A 653.66 853.61 lb-0b 2p

2 P°-7s 2 S 64.003 A 653.49 847.20 Ob-lb 2s 2 S-6p

2 P°

61.949 A 653.48 853.61 01-01 28 64.006 A 653.49 847.19 0i-0i 49

61.977 A 653.60 853.62 2p

2 ?°-7d 2 D 61.951 A 653.49 853.61 Ob-lb 2s 2 S-7p 2 P°

etc. 29 etc. 61.952 A 653.49 853.61 0|-0| 50

60.741 A 653.66 857.78 11-01 2p

2 P°-8s 2 S 60.687 A 653.49 857.78 ob-lb 2s 2 S-8p 2 P°

60.686 A 653.48 857.78 01-01 30 60.688 A 653.49 857.78 01-01 51

60.713 A 653.60 857.78 2p

2 P°-8g? 2 D 59.851 A 653.49 860.64 Ob- 2s 2 S-9p

2 P°

etc. 31 etc. 52

59.903 A 653.66 860.63 11-01 2p

2 P°-9s 2 S 59.266 A 653.49 862.68 Ob-lb 2s 2 S-10p 2 P°

59.849 A 653.48 860.63 01-01 32 59.267 A 653.49 862.68 0b-0i 53

59.875 A 653.60 860.64 2p

2 P°-9d 2 D

etc. 33 etc. 292.980 A 774.61 816.93 lb-0b 3p

2 P°-4s 2 S

292.599 A 774.56 816.93 0b-0b 54

59.317 A 653.66 862.68 11-01 2p

2 P°-10s 2 S

59.264 A 653.48 862.68 01-01 34 200.211 A 774.61 836.54 lb-Ob 3p

2 P°-5s 2 S

200.033 A 774.56 836.54 0b-0b 55

59.290 A 653.60 862.68 2p

2 P°-10c? 2 D

etc. 35 etc. 170.831 A 774.61 847.19 lb-Ob 3p

2 P°-6s 2 S

170.701 A 774.56 847.19 0b-0b 56

58.891 A 653.66 864.19 11-01 2p

2 P°-lls 2 S

58.839 A 653.48 864.19 01-01 36 156.946 A 774.61 853.61 lb-Ob 3p

2 P°-7s 2 S

156.836 A 774.56 853.61 0b-0b 57

58.865 A 653.60 864.19 2p

2 P°-1 Id 2 D

etc. 37 etc. 149.082 A 774.61 857.78 lb-Ob 3p

2 P°-8s 2 S

148.983 A 774.56 857.78 0b-0b 58

58.571 A 653.66 865.34 11-01 2p

2 P°-12s 2 S

58.520 A 653.48 865.34 01-01 38 144.130 A 774.61 860.63 lb-Ob 3p

2 P°-9s 2 S

144.038 A 774.56 860.63 0b-0b 59

58.545 A 653.60 865.34 2p

2 P°-\2d 2 D

etc. 39 etc. 140.786 A 774.61 862.68 lb-Ob 3p

2 P°-10s 2 S

140.698 A 774.56 862.68 0b-0b 60

58.325 A 653.66 866.23 11-01 2p

2 P°-13s 2 S

58.274 A 653.48 866.23 01-01 40

292.465 A 774.56 816.95 Ob- lb 3s 2 S-4p 2 P°

58.299 A 653.60 866.24 2p

2 P°-13<7 2 D 292.626 A 774.56 816.93 0b-0b 61

etc. 41 etc. 200.005 A 774.56 836.55 Ob- lb 3s 2 S-5p 2 P°

58.130 A 653.66 866.94 11-01 2p

2 P°-14s 2 S 200.044 A 774.56 836.54 0b-0b 62

58.080 A 653.48 866.94 01-01 42

170.692 A 774.56 847.20 Ob-lb 3s 2 S-6p 2 P°

58.105 A 653.60 866.94 2p

2 P°-14<f 2 D 170.709 A 774.56 847.19 0b-0b 63

etc. 43 etc. 156.833 A 774.56 853.61 Ob-lb 3s 2 S-7p 2 P°

57.975 A 653.66 867.52 11-01 2p

2 P°-15s 2 S 156.842 A 774.56 853.61 0b-0b 64

57.924 A 653.48 867.52 01-01 44

57.950 A 653.60 867.52 2p

2 P°-15<f 2 D 292.775 774.62 816.96 3<f

2 D-4/ 2 F°

etc. 45 etc. etc. 65 etc.

200.151 774.62 836.56 M 2 D-5/ 2 F° 102.355 A 653.49 774.61 01-11 2s 2 S-3p

2 P° etc. 66 etc. 102.402 A 653.49 774.56 01-01 46

B8 VIII-2
Mu It iplet Table

Ovill —Continued O VIII —Continued

Ref Int E P

J Multiplet No. Ref Int

E P

I A J Multiplet No. Low High

I A Low High

Vac Vac

170.798 774.62 847.20 3d 2 D-6f 2 F° 271.149 A 816.96 862.68 id 2 D-10/ 2 F°

etc. 67 etc. etc. 83 etc.

156.922 774.62 853.62 3d 2 D-7/ 2 F°

etc. 68 etc. 1165.379 A 836.55 847.19 1HH 5p

2 P°-6s 2 S

1164.077 A 836.54 847.19 0i-0* 84

149.062 774.62 857.78 3d 2 D-8/ 2 F°

etc. 69 etc. 726.749 A 836.55 853.61 i*-o* 5p

2 P°-75 2 S

726.243 A 836.54 853.61 o*-o* 85

144.113 774.62 860.64 3t/

2 D-9/ 2 F°

etc. 70 etc. 584.078 A 836.55 857.78 1HH 5p

2 P°-8s 2 S

583.751 A 836.54 857.78 o*-o* 86

140.770 774.62 862.68 3d 2 D-10/ 2 F°

etc. 71 etc. 514.793 A 836.55 860.63 1 O

—1

5p

2 P°-9s 2 S

514.538 A 836.54 860.63 0HH 87

633.012 A 816.95 836.54 H-(H 4p

2 P°-552 S 474.532 A 836.55 862.68 li-0i 5p

2 P°-10i 2 S

632.259 A 816.93 836.54 01-01 72 474.316 A 836.54 862.68 0*-0i 88

410.046 A 816.95 847.19 11-01 4p

2 P°-6s 2 S

409.730 A 816.93 847.19 01-01 73 1164.77 A 836.55 847.20 5<f

2 D-6/ 2 F° 89

338.221 A 816.95 853.61 11-01 4/>

2 P°-7s 2 S

338.006 A 816.93 853.61 o 1o-|04 74 726.644 836.55 853.62 5d 2 D-7/ 2 F° 90

303.697 A 816.95 857.78 11-01 4p

2 P°-& 2 S

303.523 A 816.93 857.78 01-01 75 584.054 836.55 857.78 5<f

2 D-8/ 2 F°

91 283.834 A 816.95 860.63 11-01 4/7

2 P°-9.s 2 S

283.682 A 816.93 860.63 01-01 76 514.796 836.55 860.64 5d 2 D-9f 2 F° 92

271.150 A 816.95 862.68 11-01 4p

2 P°-10s 2 S

271.012 A 816.93 862.68 01-01 77 474.545 836.55 862.68 5d 2 D-10/ 2 F° 93

632.653 A 816.96 836.56 4<f

2 D-5/ 2 F°

etc. 78 etc. 1932.853 A 847.20 853.61 H-0i 6p 2 P°-7i 2 S

1930.763 A 847.19 853.61 0*-0i 94

409.971 A 816.96 847.20 id 2 D-6/ 2 F°

etc. 79 etc. 1171.674 A 847.20 857.78 li-Oi 6p

2 P°-8s 2 S

1170.905 A 847.19 857.78 Oi-o* 95

338.194 A 816.96 853.62 4<7

2 D-7/ 2 F°

etc. 80 etc. 922.586 A 847.20 860.63 H-0i 6p 2 P°-9i 2 S

922.109 A 847.19 860.63 o*-o* %

303.685 A 816.96 857.78 id 2 D-8/ 2 F°

etc. 81 etc. 800.820 A 847.20 862.68 li-o* 6p 2 P°-10s 2 S

800.461 A 847.19 862.68 o*-o* 97

283.830 A 816.96 860.64 id 2 D-9/ 2 F°

etc. 82 etc.

B8 v 1 1 1 -

3

U S GOVERNMENT PRINTING OFFICE 1978 0 270 376
NBS-1 14A (REV. 1 1-77)

U.S. DEPT. OF COMM.

BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO.

NSRDS-NBS 3, Section 8

2. Gov’t Accession

No.

3. Recipient’s Accession No.

4. TITLE AND SUBTITLE

Selected Tables of Atomic Spectra

A Atomic Energy Levels - Second Edition

B Multiplet Tables

0 VI, 0 VII, 0 VIII

5. Publication Date

Jan. 1979

6. Performing Organization Code

7. AUTHOR(S)

Charlotte E. Moore

8. Performing Organ. Report No.

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project/Task/Work Unit No.

11. Contract/Grant No.

12. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

Same as item 9

13. Type of Report & Period

Covered

N/A

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

Library of Congress Catalog Card Number: 64-60074

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here.)

The present publication is the eighth Section of a series being

prepared in response to the need for a current revision of two

sets of the author's tables containing data on atomic spectra as

derived from analyses of optical spectra. As in the previous

Sections, Part A contains the atomic energy levels and Part B

the multiplet tables. Section 8 includes these data for 0 VI,

0 VII, and 0 VIII, thereby completing the spectra of oxygen.

The form of presentation is described in detail in the text to

Section 1.

17. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name; separated by semicolons) Atomic energy levels, 0 VI - 0 VIII; atomic spectra,

0 VI - 0 VIII; multiplet tables, 0 VI - O VIII; oxygen, spectra, 0 VI - 0 VIII; spectra, 0 VI - 0 VIII; wavelengths, 0 VI - 0 VIII.

18. AVAILABILITY Unlimited 19. SECURITY CLASS

(THIS REPORT)

21. NO. OF PAGES.

I ! For Official Distribution. Do Not Release to NTIS

UNCL ASSIFIED

31

fcj^Order From Sup. of Doc., U.S. Government Printing Office Washington, D.C. 20402, SD Stock No. 003-003-01964-020. SECURITY CLASS

(THIS PAGE)

22. Price

I 1 Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151 UNCLASSIFIED

JSCOMM-DC 66030-P78
Now in its sixth year, this valuable publication has proved that it fills the important gaps for you in the literature of the

physical sciences. Published by the American Institute of Physics and the American Chemical

Society for the National Bureau of Standards, this quarterly gives you quantitative numerical data, with recommended

values and uncertainty limits chosen by

experts in the field

Critical commentary on methods of measurement and sources of error, as well as full references to the original litera- ture, is an integral part of each of your

four issues a year Can you afford to be without this prime

source of reliable data on physical and

chemical properties? To start receiving your copies, just fill in the order form and

drop into the mail If you do use a pur- chase order, please attach the printed form

as this will help us to expedite your order. Send for complete list of reprints!

Where can you find

all the reference data

you need?

Right in the

Journal of Physical

and Chemical

Reference Data!

Journal of Physical and Chemical Reference Data American Chemical Society 1155 Sixteenth Street, N.W., Washington, D C 20036

Yes, I would like to receive the JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA at the one-year rate checked below

Name

Street

City _

Home

Business

State Zip

U S. , Canada. Mexico

Members Nonmembers

$25.00 $100.00

Other Countries D $29.00 O $104 00

Bill me Bill company or school Payment enclosed

Please Attach This Order Form To Purchase Order
Address

City State Zip Code

| Title Employer

| Please add $1 .50 extra for foreign postage and handling I

I J

Important

Additions

TO THE JOURNAL OF PHYSICAL AND

CHEMICAL REFERENCE DATA

Three comprehensive reference volumes,

each, as the Journal itself, published by the American Institute of Physics and the American Chemical Society for the National

Bureau of Standards . .

. your triple assurance of their accuracy, immediacy,

and usefulness.

Supplement No. 1 to Vol. 2 “PHYSICAL AND THERMODYNAMIC

PROPERTIES OF ALIPHATIC ALCOHOLS”

by R. C. Wilhoit and B. J. Zwolinski, Thermodynamics Research Center, Department of Chemistry. Texas A & M University Represents the most exhaustive review and critical analysis of selected physical and thermodynamic properties of aliphatic alco- hols that has been published in the world literature of chemistry.

Supplement No. 1 to Vol. 3 “THERMAL CONDUCTIVITY OF THE ELEMENTS:

A COMPREHENSIVE REVIEW”

by C. Y. Ho. R. W. Powell, and P. E. Liley, Thermophysical Properties Research Center, Purdue University, West Lafayette, Indiana This comprehensive review of the world's thermal conductivity data

presents recommended or estimated values for all 105 elements.

/ am enclosing a check / am enclosing a money order

Name

Supplement No. 1 to Vol. 6 ENERGETICS OF GASEOUS IONS

by H. M. Rosenstock, K. Draxl, B. Steiner, and

J. T. Herron, National Bureau of Standards Provides a comprehensive body

of critically evaluated information on ionization potentials, ap- pearance potentials, electron af- finities and heats of formation of gaseous positive and negative

ions. It is a complete revision and

extension of the earlier reference

work, ‘‘Ionization Potentials, Appearance Potentials and Heats

for Formation of Gaseous Positive Ions,” NSRDS-NBS 26.

Please send copies of

A. “PHYSICAL AND THERMODYNAMIC PROPERTIES OF ALIPHATIC ALCOHOLS.” (First supplement to Vol. 2 of the Journal of Physical and

Chemical Reference Data.) Hard Cover:$33.00. Soft Cover: $30.00.

B. “THERMAL CONDUCTIVITY OF THE ELEMENTS. A COMPREHENSIVE

REVIEW.” (First supplement to Vol. 3 of the Journal of Physical and

Chemical Reference Data.) Hard Cover: $60.00. Soft Cover: $55.00

C. “ENERGETICS OF GASEOUS IONS.” (First supplement to Vol. 6 of the Journal of Physical and Chemical Reference Data.) Hard Cover: $70.00

Soft Cover: $65.00.

Business Operations—Books and Journals Dept. American Chemical Society 1155 16th Street, N.W. Washington, D C. 20036
Announcement of New Publications in

National Standard Reference Data Series

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 N-519)
I

-
NBS TECHNICAL PUBLICATIONS

PERIODICALS

JOURNAL OF RESEARCH—The Journal of Research

of the National Bureau of Standards reports NBS research

and development in those disciplines of the physical and

engineering sciences in which the Bureau is active. These

include physics, chemistry, engineering, mathematics, and

computer sciences. Papers cover a broad range of subjects,

with major emphasis on measurement methodology, and

the basic technology underlying standardization. Also in- cluded from time to time are survey articles on topics closely

related to the Bureau’s technical and scientific programs. As

a special service to subscribers each issue contains complete

citations to all recent NBS publications in NBS and non- NBS media. Issued six times a year. Annual subscription:

domestic $17.00; foreign $21.25. Single copy, $3.00 domestic;

$3.75 foreign. Note: The Journal was formerly published in two sections: Section A “Physics and Chemistry” and Section B “Mathematical Sciences.”

DIMENSIONS/NBS

This monthly magazine is published to inform scientists, engineers, businessmen, industry, teachers, students, and

consumers of the latest advances in science and technology,

with primary emphasis on the work at NBS. The magazine

highlights and reviews such issues as energy research, fire protection, building technology, metric conversion, pollution

abatement, health and safety, and consumer product per- formance. In addition, it reports the results of Bureau pro- grams in measurement standards and techniques, properties

of matter and materials, engineering standards and services,

instrumentation, and automatic data processing.

Annual subscription: Domestic, $1 1.00; Foreign $13.75

NONPERIODICALS

Monographs—Major contributions to the technical liter- ature on various subjects related to the Bureau’s scientific and technical activities. Handbooks—Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations,

and regulatory bodies.

Special Publications—Include proceedings of conferences

sponsored by NBS, NBS annual reports, and other special

publications appropriate to this grouping such as wall charts,

pocket cards, and bibliographies.

Applied Mathematics Series—Mathematical tables, manuals, and studies of special interest to physicists, engineers,

chemists, biologists, mathematicians, computer programmers,

and others engaged in scientific and technical work.

National Standard Reference Data Series—Provides quantitative data on the physical and chemical properties of

materials, compiled from the world’s literature and critically evaluated. Developed under a world-wide program co- ordinated by NBS. Program under authority of National

Standard Data Act (Public Law 90-396).

NOTE: At present the principal publication outlet for these data is the Journal of Physical and Chemical Reference

Data (JPC'RD) published quarterly for NBS by the American Chemical Society (ACS) and the American Institute of

Physics (AIP). Subscriptions, reprints, and supplements

available from ACS, 1155 Sixteenth St. N.W., Wash., D.C.

20056.

Building Science Series—Disseminates technical information

developed at the Bureau on building materials, components,

systems, and whole structures. The series presents research

results, test methods, and performance criteria related to the

structural and environmental functions and the durability

and safety characteristics of building elements and systems.

Technical Notes—Studies or reports which are complete in themselves but restrictive in their treatment of a subject.

Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject area. Often

serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies.

Voluntary Product Standards—Developed under procedures

published by the Department of Commerce in Part 10, Title 15, of the Code of Federal Regulations. The purpose

of the standards is to establish nationally recognized requirements for products, and to provide all concerned interests with a basis for common understanding of the characteristics of the products. NBS administers this program as a supplement to the activities of the private sector standardizing

organizations.

Consumer Information Series—Practical information, based on NBS research and experience, covering areas of interest

to the consumer. Easily understandable language and

illustrations provide useful background knowledge for shopping in today’s technological marketplace.

Order above NBS publications from: Superintendent of Documents, Government Printing Office, Washington, D.C.

20402.

Order following NBS publications—NBSIR’s and FIPS from

the National Technical Information Services, Springfield, Va. 22161.

Federal Information Processing Standards Publications

(FIPS PUB)—Publications in this series collectively consti- tute the Federal Information Processing Standards Register.

Register serves as the official source of information in the Federal Government regarding standards issued by NBS

pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat. 1127), and as implemented by Executive Order 11717

(38 FR 12315, dated May 11, 1973) and Part 6 of Title 15

CFR (Code of Federal Regulations).

NBS Interagency Reports (NBSIR)—A special series of

interim or final reports on work performed by NBS for outside sponsors (both government and non-government).

In general, initial distribution is handled by the sponsor;

public distribution is by the National Technical Information

Services (Springfield, Va. 22161) in paper copy or microfiche

form.

BIBLIOGRAPHIC SUBSCRIPTION SERVICES

The following current-awareness and literature-survey bibli- ographies are issued periodically by the Bureau:

Cryogenic Data Center Current Awareness Service. A litera- ture survey issued biweekly. Annual subscription: Domestic, $25.00; Foreign, $30.00.

Liquified Natural Gas. A literature survey issued quarterly.

Annual subscription: $20.00.

Superconducting Devices and Materials. A literature survey

issued quarterly. Annual subscription: $30.00. Send subscription orders and remittances for the preceding bibliographic

services to National Bureau of Standards, Cryogenic Data

Center (275.02) Boulder, Colorado 80302.
U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards

Washington. D.C. 20234

OFFICIAL BUSINESS

Penalty for Private Use, $300

POSTAGE AND FEES PAID

U.S. DEPARTMENT OF COMMERCE

COM-215

SPECIAL FOURTH-CLASS RATE

BOOK