Abstract

The hollow cathode spectrum of cadmium has been observed over the wave-length range from 600A to 6500A. In Cd I the <sup>3</sup><i>D</i> series has been resolved and extended. In Cd II the work of von Salis and Takahashi has been corrected and considerably extended. The <sup>2</sup><i>P</i> and <sup>2</sup><i>F</i> series are very perturbed by the overlapping 4<i>d</i><sup>9</sup>5<i>s</i>5<i>p</i> configuration which is nearly complete. No series terms have been found in the 4<i>d</i><sup>9</sup>5<i>sns</i> series. Cd III is excited very strongly in the discharge and the analysis is now much extended. The odd terms are from 4<i>d</i><sup>9</sup>5<i>p</i> and they combine with 4<i>d</i><sup>10</sup>, 4<i>d</i><sup>9</sup>5<i>s</i>, 4<i>d</i><sup>9</sup>6<i>s</i>, 4<i>d</i><sup>9</sup>5<i>d</i>, and 4<i>d</i><sup>8</sup>5<i>s</i><sup>2</sup>. An ionization potential of 37.6 volts can be calculated from the 4<i>d</i><sup>9</sup><i>ns</i> series.

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  1. G. von Salis, Ann. d. Physik 76, 145 (1925).
  2. Y. Takahashi, Ann. d. Physik 3, 27 (1929).
  3. L. and E. Bloch, Ann. de Physique 5, 325 (1936).
  4. F. Esclangon, J. de phys. et rad. 7, 52 (1926).
  5. A. G. Shenstone, Phil. Trans. Roy. Soc. A241, 297 (1948).
  6. A. G. Shenstone, Phys. Rev. 57, 894 (1940).
  7. R. C. Gibbs and H. E. White, Phys. Rev. 31, 776 (1928); J. C. McLennan, A. B. McLay, and M. F. Crawford, Trans. Roy. Soc. Can. 22, 45 (1928).
  8. E. Rasmussen, D. Kgl. Danske Vrdensk. Selskab, Math-Phys. Medd XVIII, 5 (1940).
  9. A. G. Shenstone, Phys. Rev. 36, 669 (1930).
  10. A. G. Shenstone, Phys. Rev. 31, 317 (1928).

Bloch, E.

L. and E. Bloch, Ann. de Physique 5, 325 (1936).

Esclangon, F.

F. Esclangon, J. de phys. et rad. 7, 52 (1926).

Gibbs, R. C.

R. C. Gibbs and H. E. White, Phys. Rev. 31, 776 (1928); J. C. McLennan, A. B. McLay, and M. F. Crawford, Trans. Roy. Soc. Can. 22, 45 (1928).

Rasmussen, E.

E. Rasmussen, D. Kgl. Danske Vrdensk. Selskab, Math-Phys. Medd XVIII, 5 (1940).

Shenstone, A. G.

A. G. Shenstone, Phys. Rev. 36, 669 (1930).

A. G. Shenstone, Phys. Rev. 31, 317 (1928).

A. G. Shenstone, Phil. Trans. Roy. Soc. A241, 297 (1948).

A. G. Shenstone, Phys. Rev. 57, 894 (1940).

Takahashi, Y.

Y. Takahashi, Ann. d. Physik 3, 27 (1929).

von Salis, G.

G. von Salis, Ann. d. Physik 76, 145 (1925).

White, H. E.

R. C. Gibbs and H. E. White, Phys. Rev. 31, 776 (1928); J. C. McLennan, A. B. McLay, and M. F. Crawford, Trans. Roy. Soc. Can. 22, 45 (1928).

Other (10)

G. von Salis, Ann. d. Physik 76, 145 (1925).

Y. Takahashi, Ann. d. Physik 3, 27 (1929).

L. and E. Bloch, Ann. de Physique 5, 325 (1936).

F. Esclangon, J. de phys. et rad. 7, 52 (1926).

A. G. Shenstone, Phil. Trans. Roy. Soc. A241, 297 (1948).

A. G. Shenstone, Phys. Rev. 57, 894 (1940).

R. C. Gibbs and H. E. White, Phys. Rev. 31, 776 (1928); J. C. McLennan, A. B. McLay, and M. F. Crawford, Trans. Roy. Soc. Can. 22, 45 (1928).

E. Rasmussen, D. Kgl. Danske Vrdensk. Selskab, Math-Phys. Medd XVIII, 5 (1940).

A. G. Shenstone, Phys. Rev. 36, 669 (1930).

A. G. Shenstone, Phys. Rev. 31, 317 (1928).

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