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XXX.—On a Simple Radioscope and a Radiometer for showing and measuring Radioactivity

Published online by Cambridge University Press:  15 September 2014

John Aitken
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Extract

While working at another subject I evolved a very simple piece of apparatus which on trial was found to be very sensitive to the penetrating rays of radioactive substances, so I have recently diverted my work from its original direction to study and improve this piece of apparatus. The principle of the action of the instrument is not new, as it depends on the fact discovered by Professor C. T. R. Wilson, that ions in air supersaturated with water vapour become centres of condensation when the supersaturation is sufficiently great.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 29 , 1909 , pp. 471 - 487
Copyright
Copyright © Royal Society of Edinburgh 1909

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References

page 471 note * Trans. Roy. Soc, Series A, 1897.Google Scholar

page 471 note † Trans. Roy. Soc. Edin., vol. xxxv. part i., 1888.Google Scholar