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The emission of positive ions from hot tungsten

Published online by Cambridge University Press:  24 October 2008

P. B. Moon
P. B. Moon
Affiliation:
Sidney Sussex College, Imperial College of Science and Technology, London
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Extract

Measurements have been made of the positive ion currents emitted by tungsten at temperatures between 3000°K. and 3200°K. The results are in general accordance with the values calculated on the basis of the Saha equation from the rate of evaporation of neutral atoms, the electron work-function and the ionisation potential of tungsten. The “work-function” associated with the ionic evaporation appears to lie between 10 and 11 electron-volts.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 28 , Issue 4 , October 1932 , pp. 490 - 496
Copyright
Copyright © Cambridge Philosophical Society 1932

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References

* Wahlin, , Phys. Rev., 34 (1929), 164.CrossRefGoogle Scholar

† Smith, , Phys. Rev., 35 (1930), 381.CrossRefGoogle Scholar

* Langmuir, and Kingdon, , Proc. Roy. Soc., 107 (1925), 61.CrossRefGoogle Scholar

* See for instance the tables of many properties of tungsten given by Jones and Langmuir in a series of articles in the General Electric Review, 1927.

† Smith, loc. cit.

‡ Mitra, , Phil. Mag., 5 (1928), 67.CrossRefGoogle Scholar

§ I am grateful to the General Electric Company, Wembley, for the gift of this material.

* Loc. cit.