The emission of electrons under the influence of chemical action

Author:

Abstract

The present investigation is a continuation of the researches on the emission of electrons under the influence of chemical action listed in the footnote. In the remainder of this paper these publications will be referred to by the numbers assigned to them in this list. All the experiments to be described were made with a liquid alloy of the composition NaK 2 , which has the lowest melting point of all the alloys of sodium and potassium, under the action of phosgene gas (COCi 2 ). At the beginning the pre-existing situation was carefully reviewed. It was felt that the most important point was to determine the energy distribution of the emitted electrons at pressures of COCl 2 less than 10 -4 mm. with as much accuracy and down to as low pressures as possible. In (6) it had only been found possible to make rough estimates of this energy distribution owing to troublesome variations in the contact potential difference between the electrodes which it was impossible to control. Another unsatisfactory feature of (6) was the “clean-up” effect of the alloy on the reacting gas. This made the real values of the pressures very uncertain, particularly at the lower pressures, so much so that the values were only given in the paper as upper limits.

Publisher

The Royal Society

Subject

General Medicine

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