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Layers of Caesium, and Nitrogen on Tungsten

Published online by Cambridge University Press:  24 October 2008

N. A. de Bruyne
N. A. de Bruyne
Affiliation:
Fellow of Trinity College
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Extract

While investigating the effect of a caesium film on the auto-electronic emission from a tungsten surface I noticed certain phenomena which seemed worth further investigation. Langmuir and Kingdon have shown that the emission from a tungsten filament in caesium vapour varies with the temperature of the filament in the manner shown in Fig. 1. The initial rise in the emission at low temperatures is due to the existence of a caesium layer on the filament. At higher temperatures the caesium evaporates and the emission drops until eventually the temperature becomes high enough to produce a thermionic emission from the clean tungsten surface.

Type
Articles
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 25 , Issue 3 , July 1929 , pp. 347 - 354
Copyright
Copyright © Cambridge Philosophical Society 1929

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References

* Langmuir, I. and Kingdon, K. H., Proc. Roy. Soc. A, 107, p. 61 (1925).CrossRefGoogle Scholar

* Worthing, and Forsythe, , Astrophys. Journal, 61, p. 146 (1925).Google Scholar

† Brit. Pat. 267, 902 (Westinghouse Co. and J. W. Marden).Google Scholar

* Langmuir, I., Phys. Zeits. 15, p. 516 (1914).Google Scholar

* Germer, L. H., Zeits. f. Physik, 54, p. 408 (1929).CrossRefGoogle Scholar