scintillation counter

scintillation counter

noun
a device for detecting and measuring radioactivity, having a crystal scintillator, a photoelectric cell sensitive to the light from scintillations, and an amplifier.
Also called scintillometer [sin-tl-om-i-ter] .


Origin:
1945–50

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Collins
World English Dictionary
scintillation counter
 
n
an instrument for detecting and measuring the intensity of high-energy radiation. It consists of a phosphor with which particles collide producing flashes of light that are detected by a photomultiplier and converted into pulses of electric current that are counted by electronic equipment

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

scintillation counter n.
A device for detecting and counting scintillations produced by ionizing radiation. Also called scintillascope.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

scintillation counter

radiation detector that is triggered by a flash of light (or scintillation) produced when ionizing radiation traverses certain solid or liquid substances (phosphors), among which are thallium-activated sodium iodide, zinc sulfide, and organic compounds such as anthracene incorporated into solid plastics or liquid solvents. The light flashes are converted into electric pulses by a photoelectric alloy of cesium and antimony, amplified about a million times by a photomultiplier tube, and finally counted. Sensitive to X rays, gamma rays, and charged particles, scintillation counters permit high-speed counting of particles and measurement of the energy of incident radiation.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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