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proportional counter

noun, Physics.
1.
a radiation counter in which the strength of each electric pulse generated per count is proportional to the energy of the particle or photon producing the pulse, alpha particles producing a different electric pulse from beta rays.
Origin
1935-1940
1935-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for proportional-counter

proportional counter

noun
1.
an instrument for detecting and measuring the intensity of ionizing radiation. It is similar to a Geiger counter but operates at a lower potential difference such that the magnitude of the discharge is directly proportional to the number of gas molecules ionized by the detected particle. This may permit the identification of the particle or the determination of its energy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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