Abstract

The analysis of the Mn II spectrum has been extended by the classification of approximately 600 additional lines. Most of the newly identified terms belong to the triplet system, for which no levels have previously been located. Intersystem lines have been found which fix the relative positions of the septet, quintet, and triplet systems and all terms of these systems to be expected within 40,000 wave numbers of the ground state have been established. No singlet levels have as yet been located.

© 1952 Optical Society of America

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References

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  1. C. W. Curtis, Phys. Rev. 53, 474 (1938).
    [CrossRef]
  2. The symbols used to designate particular terms are given in Table I or in reference of footnote 1.
  3. Unpublished measurements furnished by M. A. Catalán.
  4. C. C. Kiess, Bur. Standards J. Research 5, 775 (1930) and Bur. Standards J. Research 15, 79 (1935).
    [CrossRef]
  5. B. Edlen and P. Swings, Astrophys. J. 95, 532 (1942).
    [CrossRef]
  6. Shenstone, Phil. Trans. Roy. Soc. 235, 195 (1936).
    [CrossRef]
  7. R. E. Trees, Phys. Rev. 83, 756 (1951).
    [CrossRef]

1951 (1)

R. E. Trees, Phys. Rev. 83, 756 (1951).
[CrossRef]

1942 (1)

B. Edlen and P. Swings, Astrophys. J. 95, 532 (1942).
[CrossRef]

1938 (1)

C. W. Curtis, Phys. Rev. 53, 474 (1938).
[CrossRef]

1936 (1)

Shenstone, Phil. Trans. Roy. Soc. 235, 195 (1936).
[CrossRef]

1930 (1)

C. C. Kiess, Bur. Standards J. Research 5, 775 (1930) and Bur. Standards J. Research 15, 79 (1935).
[CrossRef]

Catalán, M. A.

Unpublished measurements furnished by M. A. Catalán.

Curtis, C. W.

C. W. Curtis, Phys. Rev. 53, 474 (1938).
[CrossRef]

Edlen, B.

B. Edlen and P. Swings, Astrophys. J. 95, 532 (1942).
[CrossRef]

Kiess, C. C.

C. C. Kiess, Bur. Standards J. Research 5, 775 (1930) and Bur. Standards J. Research 15, 79 (1935).
[CrossRef]

Shenstone,

Shenstone, Phil. Trans. Roy. Soc. 235, 195 (1936).
[CrossRef]

Swings, P.

B. Edlen and P. Swings, Astrophys. J. 95, 532 (1942).
[CrossRef]

Trees, R. E.

R. E. Trees, Phys. Rev. 83, 756 (1951).
[CrossRef]

Astrophys. J. (1)

B. Edlen and P. Swings, Astrophys. J. 95, 532 (1942).
[CrossRef]

Bur. Standards J. Research (1)

C. C. Kiess, Bur. Standards J. Research 5, 775 (1930) and Bur. Standards J. Research 15, 79 (1935).
[CrossRef]

Phil. Trans. Roy. Soc. (1)

Shenstone, Phil. Trans. Roy. Soc. 235, 195 (1936).
[CrossRef]

Phys. Rev. (2)

R. E. Trees, Phys. Rev. 83, 756 (1951).
[CrossRef]

C. W. Curtis, Phys. Rev. 53, 474 (1938).
[CrossRef]

Other (2)

The symbols used to designate particular terms are given in Table I or in reference of footnote 1.

Unpublished measurements furnished by M. A. Catalán.

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Figures (3)

Fig. 1
Fig. 1

Energy level diagram of Mn II.

Fig. 2
Fig. 2

Relative positions of terms based on 3d54s.

Fig. 3
Fig. 3

Relative positions of terms based on 3d6.

Tables (3)

Tables Icon

Table I New energy levels of Mn II with respect to normal state, 4s7S3=0.

Tables Icon

Table IIA Newly classified lines of Mn II from 2000A to 6500A. Columns 1, 2, 3: visual estimate of intensity in neon Schuler tube, helium Schuler tube, and spark. Column 4: wavelength in air, A. Column 5: wave number, cm−1. Column 6: classification.

Tables Icon

Table IIB Newly classified lines of Mn II below 2000A. Columns 1, 2: visual estimate of intensity in neon Schuler tube and helium Schuler tube. Column 3: vacuum wavelength, A. Column 4: wave number, cm−1. Column 5: classification.