Other
Scientific paper
Sep 1931
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1931natur.128..547w&link_type=abstract
Nature, Volume 128, Issue 3230, pp. 547-548 (1931).
Other
1
Scientific paper
A SUMMARY of the results of an experimental research concerning the formation of negative ions from electrons may prove of interest. The electrons were generated by means of light emitted from a quartz mercury vapour lamp (`Home Sun' D.C. type) and incident upon a gold-plated electrode distant 2 cm. from a similar electrode. Between these two electrodes an alternating potential difference of `square' wave form was established. During a fraction (ƒ) of the time of a complete cycle the electric carriers advance to the receiving electrode; in the remainder of the cycle their motion is reversed, and they are withdrawn from the gas. The gas contained in the measuring vessel was air at various pressures; no purification of the air was attempted other than careful drying.
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