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The Capture of Electrons by α-Particles

Published online by Cambridge University Press:  24 October 2008

H. C. Webster  and
E. Rutherford
H. C. Webster
Affiliation:
Clare College
E. Rutherford
Affiliation:
Clare College
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Extract

Davis and Barnes have recently reported new and unexpected phenomena concerning the capture of electrons by swift α-particles. A beam of α-particles from a polonium source was passed through a stream of electrons emitted from an oxide-coated filament and accelerated by a known voltage so as to move in directions roughly parallel to those of the α-particles. The α-particles were then deflected by a magnetic field, and finally fell on a zinc sulphide screen, where the scintillations were counted. If any of the α-particles captured electrons while passing through the electron stream, they would fall on a different part of the screen, since the magnetic deflection is proportional to the charge. Any capture could thus easily be detected, and its dependence on the accelerating voltage examined.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 27 , Issue 1 , January 1931 , pp. 116 - 130
Copyright
Copyright © Cambridge Philosophical Society 1931

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References

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