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  1. R. F. Bacher and S. Goudsmit, Atomic Energy States as Derived from the Analyses of Optical Spectra (McGraw-Hill Book Company, Inc., New York, 1932).
    [CrossRef]
  2. A. G. Shenstone, Reports on Progress in Physics (University Press, Cambridge, 1939), Vol. 5, p. 210.
    [CrossRef]
  3. W. Pauli, Naturwiss. 12, 741 (1924).
    [CrossRef]
  4. W. F. Meggers and K. Burns, J. Opt. Soc. Am. 14, 449 (1927).
  5. W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
    [CrossRef]
  6. W. F. Meggers and B. F. Scribner, Index to the Literature on Spectrochemical Analysis, 1920–1939 (American Society for Testing Materials, Philadelphia, 1941).
    [CrossRef]
  7. J. A. Wheeler, Proc. Am. Phil. Soc. 90, 36 (1946).
  8. E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
    [CrossRef]
  9. C. M. Sitterly and A. S. King, Proc Am. Phil. Soc. 86, 339 (1943).
    [CrossRef]

1946 (2)

J. A. Wheeler, Proc. Am. Phil. Soc. 90, 36 (1946).

E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
[CrossRef]

1943 (1)

C. M. Sitterly and A. S. King, Proc Am. Phil. Soc. 86, 339 (1943).
[CrossRef]

1927 (1)

1924 (1)

W. Pauli, Naturwiss. 12, 741 (1924).
[CrossRef]

1922 (1)

W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
[CrossRef]

Bacher, R. F.

R. F. Bacher and S. Goudsmit, Atomic Energy States as Derived from the Analyses of Optical Spectra (McGraw-Hill Book Company, Inc., New York, 1932).
[CrossRef]

Burns, K.

Goudsmit, S.

R. F. Bacher and S. Goudsmit, Atomic Energy States as Derived from the Analyses of Optical Spectra (McGraw-Hill Book Company, Inc., New York, 1932).
[CrossRef]

Kiess, C. C.

W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
[CrossRef]

King, A. S.

C. M. Sitterly and A. S. King, Proc Am. Phil. Soc. 86, 339 (1943).
[CrossRef]

Meggers, W. F.

W. F. Meggers and K. Burns, J. Opt. Soc. Am. 14, 449 (1927).

W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
[CrossRef]

W. F. Meggers and B. F. Scribner, Index to the Literature on Spectrochemical Analysis, 1920–1939 (American Society for Testing Materials, Philadelphia, 1941).
[CrossRef]

Pauli, W.

W. Pauli, Naturwiss. 12, 741 (1924).
[CrossRef]

Pound, R. V.

E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
[CrossRef]

Purcell, E. M.

E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
[CrossRef]

Scribner, B. F.

W. F. Meggers and B. F. Scribner, Index to the Literature on Spectrochemical Analysis, 1920–1939 (American Society for Testing Materials, Philadelphia, 1941).
[CrossRef]

Shenstone, A. G.

A. G. Shenstone, Reports on Progress in Physics (University Press, Cambridge, 1939), Vol. 5, p. 210.
[CrossRef]

Sitterly, C. M.

C. M. Sitterly and A. S. King, Proc Am. Phil. Soc. 86, 339 (1943).
[CrossRef]

Stimson, F. J.

W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
[CrossRef]

Torrey, H. C.

E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
[CrossRef]

Wheeler, J. A.

J. A. Wheeler, Proc. Am. Phil. Soc. 90, 36 (1946).

J. Opt. Soc. Am. (1)

Naturwiss. (1)

W. Pauli, Naturwiss. 12, 741 (1924).
[CrossRef]

Phys. Rev. (1)

E. M. Purcell, H. C. Torrey, and R. V. Pound, Phys. Rev. 69, 37 (1946).
[CrossRef]

Proc Am. Phil. Soc. (1)

C. M. Sitterly and A. S. King, Proc Am. Phil. Soc. 86, 339 (1943).
[CrossRef]

Proc. Am. Phil. Soc. (1)

J. A. Wheeler, Proc. Am. Phil. Soc. 90, 36 (1946).

Sci. Pap. Bur. Stand. (1)

W. F. Meggers, C. C. Kiess, and F. J. Stimson, Sci. Pap. Bur. Stand. 18, 235 (1922).
[CrossRef]

Other (3)

W. F. Meggers and B. F. Scribner, Index to the Literature on Spectrochemical Analysis, 1920–1939 (American Society for Testing Materials, Philadelphia, 1941).
[CrossRef]

R. F. Bacher and S. Goudsmit, Atomic Energy States as Derived from the Analyses of Optical Spectra (McGraw-Hill Book Company, Inc., New York, 1932).
[CrossRef]

A. G. Shenstone, Reports on Progress in Physics (University Press, Cambridge, 1939), Vol. 5, p. 210.
[CrossRef]

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Tables (2)

Tables Icon

Table I Present state of atomic spectrum analysis. Successive columns contain the atomic number Z, chemical symbol of the atom and approximate appraisals of the present state of atomic spectrum analysis. The roman numerals heading columns represent individual spectra when combined with chemical symbols in column 2. Each spectrum has been given a rough rating A, B, C, D, or E. The A signifies a spectrum analysis that is complete or practically so, the E means that very little is known concerning the spectrum or its structure, and B, C, D represent intermediate stages of analysis. In assigning these ratings an effort was made to appraise the analyses relative to theoretical spectra but in many cases this was difficult and doubtful. The main purpose is to indicate which spectra, in our judgment, deserve further investigation, in addition to those totally unknown or unanalyzed. Each rating is accompanied by one to four numerals which stand for literature citations collected at the end of this paper. These references were selected as the minimum number that will give, in our opinion, the most complete or reliable information on atomic energy states now known. Unpublished material with which we are familiar has been included. Additional literature references can be supplied upon request.

Tables Icon

Table II Mechanical, magnetic, and quadrupole moments of atomic nuclei. The unit of mechanical moment is h/2π, where h is Planck’s constant. The unit of magnetic moment is he/4π Mpc, where e is the electronic charge, Mp the mass of the proton, and c the velocity of light. The unit of quadrupole moment is 10−24 cm2. Values are taken from the literature cited which represents, in our opinion, the most reliable results. All reported results are not equally trustworthy but a critical review is not attempted here. References in addition to those listed at the end of this paper will be supplied on request.