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  1. E. C. Kemble, Phys. Rev. 19, p. 394; 1922. (Abstract.)
  2. Foote and Mohler give the value 13.7 volts. (Origin of Spectra, p. 186.) Their value has since been confirmed by Knipping (Zs. f. Phys. 7, p. 328; 1921) and by Mackay (Phys. Rev. 24, p. 319, 1924.)
  3. E. F. Barker and O. S Duffendack, Phys. Rev. 26, p. 339; 1925.
  4. F. L. Mohler, Phys. Rev. 25, p. 583, 1925 (Abstract).
  5. Phil. Mag. 47, p. 549; 1924.
  6. j is the quantum number which measures the total angular momentum of the molecule and j-m is equivalent to Kratzer's ρ. (Cf. Eq. 3a below.) Bell uses the symbols m′, m, m0′ for the quantities here designated as m,j,ρ respectively.
  7. ρ is usually assumed to be ½ for the HC1 bands. The analysis given below makes 0.4925 the most probable value of ρ. The large discrepancy between Mr. Bell's value of ρ and the others is due to the fact that he uses negative values of j for the negative branch of the band and fails to change the sign of ρ with that of j. Thus the absolute values of m which he uses in connection with the negative branch are not the same as those for the positive branch.
  8. W. F. Colby, Astrophys. J. 58, p. 303; 1923.
  9. A. Kratzer, Annalen d. Physik 71, p. 72; 1923.
  10. Kratzer gives larger values of δ for the upper electronic level associated with cyanogen, mercury, and zinc bands analysed by him. In the case of cadmium the reverse is true, but δ is here fairly small for both initial and final states.
  11. A. Kratzer: Zs. f. Phys. 3, p. 289; 1920.
  12. M. Born and E. Hückel: Physikal. Zs. 24, p. 1; 1923.
  13. E. C. Kemble: Proc. Nat. Acad. Sci. 7, p. 283; 1921.
  14. The author is informed by Professor Birge that the analysis of the vibrational energy values associated with electronic bends indicates that the coefficient δ of the cubic term in the expression for An is generally negligible, even though the terms of higher degree must be taken into account.
  15. F. W. Loomis: Astrophys. J. 52, p. 248; 1920.
  16. Colby, Meyer, and Bronk: Astrophys. J. 57, p. 7; 1923.
  17. Primes refer to the upper energy level and double primes to the lower one.
  18. R. S. Mulliken: Phys. Rev. 25, p. 259; 1925.
  19. M. Born and W. Heisenberg: Zs. f. Phys. 23, p. 388; 1924.
  20. K. Fajans and G. Joos: Zs. f. Phys. 23, p. 1; 1924.
  21. Cf. M. Born: Die Naturwissenschaften 12, p. 1203; 1924. E. V. Angerer: Zs. f. Phys. 11, p. 167; 1922.
  22. O Oldenberg: Zs. f. Phys. 25, p. 2; 1924.

Barker, E. F.

E. F. Barker and O. S Duffendack, Phys. Rev. 26, p. 339; 1925.

Born, M.

M. Born and E. Hückel: Physikal. Zs. 24, p. 1; 1923.

M. Born and W. Heisenberg: Zs. f. Phys. 23, p. 388; 1924.

Cf. M. Born: Die Naturwissenschaften 12, p. 1203; 1924. E. V. Angerer: Zs. f. Phys. 11, p. 167; 1922.

Colby, W. F.

W. F. Colby, Astrophys. J. 58, p. 303; 1923.

Duffendack, O. S

E. F. Barker and O. S Duffendack, Phys. Rev. 26, p. 339; 1925.

Fajans, K.

K. Fajans and G. Joos: Zs. f. Phys. 23, p. 1; 1924.

Heisenberg, W.

M. Born and W. Heisenberg: Zs. f. Phys. 23, p. 388; 1924.

Hückel, E.

M. Born and E. Hückel: Physikal. Zs. 24, p. 1; 1923.

Joos, G.

K. Fajans and G. Joos: Zs. f. Phys. 23, p. 1; 1924.

Kemble, E. C.

E. C. Kemble, Phys. Rev. 19, p. 394; 1922. (Abstract.)

E. C. Kemble: Proc. Nat. Acad. Sci. 7, p. 283; 1921.

Kratzer, A.

A. Kratzer, Annalen d. Physik 71, p. 72; 1923.

A. Kratzer: Zs. f. Phys. 3, p. 289; 1920.

Loomis, F. W.

F. W. Loomis: Astrophys. J. 52, p. 248; 1920.

Mohler, F. L.

F. L. Mohler, Phys. Rev. 25, p. 583, 1925 (Abstract).

Mulliken, R. S.

R. S. Mulliken: Phys. Rev. 25, p. 259; 1925.

Oldenberg, O.

O Oldenberg: Zs. f. Phys. 25, p. 2; 1924.

Other

E. C. Kemble, Phys. Rev. 19, p. 394; 1922. (Abstract.)

Foote and Mohler give the value 13.7 volts. (Origin of Spectra, p. 186.) Their value has since been confirmed by Knipping (Zs. f. Phys. 7, p. 328; 1921) and by Mackay (Phys. Rev. 24, p. 319, 1924.)

E. F. Barker and O. S Duffendack, Phys. Rev. 26, p. 339; 1925.

F. L. Mohler, Phys. Rev. 25, p. 583, 1925 (Abstract).

Phil. Mag. 47, p. 549; 1924.

j is the quantum number which measures the total angular momentum of the molecule and j-m is equivalent to Kratzer's ρ. (Cf. Eq. 3a below.) Bell uses the symbols m′, m, m0′ for the quantities here designated as m,j,ρ respectively.

ρ is usually assumed to be ½ for the HC1 bands. The analysis given below makes 0.4925 the most probable value of ρ. The large discrepancy between Mr. Bell's value of ρ and the others is due to the fact that he uses negative values of j for the negative branch of the band and fails to change the sign of ρ with that of j. Thus the absolute values of m which he uses in connection with the negative branch are not the same as those for the positive branch.

W. F. Colby, Astrophys. J. 58, p. 303; 1923.

A. Kratzer, Annalen d. Physik 71, p. 72; 1923.

Kratzer gives larger values of δ for the upper electronic level associated with cyanogen, mercury, and zinc bands analysed by him. In the case of cadmium the reverse is true, but δ is here fairly small for both initial and final states.

A. Kratzer: Zs. f. Phys. 3, p. 289; 1920.

M. Born and E. Hückel: Physikal. Zs. 24, p. 1; 1923.

E. C. Kemble: Proc. Nat. Acad. Sci. 7, p. 283; 1921.

The author is informed by Professor Birge that the analysis of the vibrational energy values associated with electronic bends indicates that the coefficient δ of the cubic term in the expression for An is generally negligible, even though the terms of higher degree must be taken into account.

F. W. Loomis: Astrophys. J. 52, p. 248; 1920.

Colby, Meyer, and Bronk: Astrophys. J. 57, p. 7; 1923.

Primes refer to the upper energy level and double primes to the lower one.

R. S. Mulliken: Phys. Rev. 25, p. 259; 1925.

M. Born and W. Heisenberg: Zs. f. Phys. 23, p. 388; 1924.

K. Fajans and G. Joos: Zs. f. Phys. 23, p. 1; 1924.

Cf. M. Born: Die Naturwissenschaften 12, p. 1203; 1924. E. V. Angerer: Zs. f. Phys. 11, p. 167; 1922.

O Oldenberg: Zs. f. Phys. 25, p. 2; 1924.

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