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The structure of a β-ray line by semicircular magnetic focusing

Published online by Cambridge University Press:  24 October 2008

K. T. Li
K. T. Li
Affiliation:
Emmanuel College
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Extract

The actual distribution of a homogeneous group of electrons by semicircular magnetic focusing is calculated for different types of source.

The dependence of maximum intensity on the radius of curvature of the path of electrons is investigated and the approximate power laws assigned to different cases. The results can be used in the measurement of the intensity of β-ray line spectra.

Tables of numerical values of effective solid angle subtended by the photographic plate at the source are given for some special cases.

The results of the above calculations have been verified experimentally.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 33 , Issue 1 , March 1937 , pp. 164 - 178
Copyright
Copyright © Cambridge Philosophical Society 1937

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References

* Wooster, , Proc. Roy. Soc. A, 114 (1927), 729.CrossRefGoogle Scholar

* It is assumed that the intensity of the beam is uniform over the slit. This is true if s ≪ d.

* In this case, the element of area for integration is γdθ dη.

* Cockcroft, , Ellis, and Kershaw, , Proc. Roy. Soc. A, 135 (1932), 628.CrossRefGoogle Scholar