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British Journal of Radiology (1933) 6, 656-665
© 1933 British Institute of Radiology
doi: 10.1259/0007-1285-6-71-656
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A Valve Amplifier for the Detailed Study of Radium Isodose Curves

G. Goldhaber and H. D. Griffith

Institut für Strahlenforschung der Universität, Berlin—Director: Prof. Dr. W. Friedrich

This excerpt was created in the absence of an abstract.

A balanced valve amplifier is described for use with a graphite ionisation chamber of 3 c.mm. volume.

Measurements were made of the intensity distribution at distances between 3 mm. and 15 mm. from the centre of radium preparations.

The results indicate that the simple Sievert formulæ for intensity distribution are, to a close approximation, applicable.

Received for publication February 10, 1933.




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