Magnetic Rotation Spectrum of the Red Bands of Sodium

W. R. Fredrickson; Carl R. Stannard

doi:10.1103/PhysRev.44.632

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Magnetic Rotation Spectrum of the Red Bands of Sodium

W. R. Fredrickson and Carl R. Stannard

Syracuse University

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Phys. Rev. 44, 632 – Published 15 October, 1933

DOI: https://doi.org/10.1103/PhysRev.44.632

Abstract

The magnetic rotation spectrum of the red bands of sodium shows a large number of doublets. A doublet is interpreted as made up of an $R$ -branch and a $P$ -branch line having a common upper $K^{'}$ rotational level. The $K^{'}$ values for the doublets are calculated and it is found that the rotational levels in the various initial vibrational states from 0-12 which give rise to magnetic rotation doublets are 53, 45, 33, 14, 60, 52, 43, 31, 16, 58, 51, 40, 28 respectively. That just these levels give rise to magnetic rotation lines suggests that these levels are perturbed. Since a ${}^{3}Π$ state is predicted to lie below the upper ${}^{1}Σ$ state we have perhaps here evidence of a perturbation between a ${}^{1}Σ$ and a ${}^{3}Π$ state. To account for the magnetic rotation doublets it has been necessary to revise the vibrational numbering, increasing the initial state numbering by three.

References (13)

R. W. Wood, Phil. Mag. 10, 408 (1905) ibid.12, 499 (1906) Wood and Hackett, Astrophys. J. 30, 339 (1909)
F. W. Loomis, Phys. Rev. 31, 323 (1928)
Loomis and Nusbaum, Phys. Rev. 38, 1447 (1931) ibid.39, 89 (1932)
Serber, Phys. Rev. 41, 489 (1932)
Loomis and Wood, Phys. Rev. 32, 223 (1928)
Fredrickson, Phys. Rev. 34, 207 (1929)
Mulliken, Rev. Mod. Phys. 2, 69 (1930)
Loomis, Phys. Rev. 31, 328 (1928)
Fredrickson and Watson, Phys. Rev. 30, 431 (1927)
Loomis and Nusbaum, Phys. Rev. 40, 383 (1932)
Jevons, Report on Band Spectra of Diatomic Molecules, p. 260
Mulliken, Rev. Mod. Phys. 4, 16 (1932)
Van Vleck, presented at the Washington Meeting of the Am. Phys. Soc., April, 1933 Phys. Rev. 43, 1047A (1933)

[c1] R. W. Wood, Phil. Mag. 10, 408 (1905) ibid.12, 499 (1906) Wood and Hackett, Astrophys. J. 30, 339 (1909)

[c2] F. W. Loomis, Phys. Rev. 31, 323 (1928)

[c3] Loomis and Nusbaum, Phys. Rev. 38, 1447 (1931) ibid.39, 89 (1932)

[c4] Serber, Phys. Rev. 41, 489 (1932)

[c5] Loomis and Wood, Phys. Rev. 32, 223 (1928)

[c6] Fredrickson, Phys. Rev. 34, 207 (1929)

[c7] Mulliken, Rev. Mod. Phys. 2, 69 (1930)

[c8] Loomis, Phys. Rev. 31, 328 (1928)

[c9] Fredrickson and Watson, Phys. Rev. 30, 431 (1927)

[c10] Loomis and Nusbaum, Phys. Rev. 40, 383 (1932)

[c11] Jevons, Report on Band Spectra of Diatomic Molecules, p. 260

[c12] Mulliken, Rev. Mod. Phys. 4, 16 (1932)

[c13] Van Vleck, presented at the Washington Meeting of the Am. Phys. Soc., April, 1933 Phys. Rev. 43, 1047A (1933)

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Magnetic Rotation Spectrum of the Red Bands of Sodium

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