Geiger-Müller counter
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Geiger-Müller counter
Credit: Wikipedia, drawn by Theresa Knott
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A radiation detection and measuring device. A Geiger-Müller counter, also called a Geiger tube, consists of a gas-filled tube which contains two electrodes held at a potential of more than 1,000 volts. An electric discharge takes place between the electrodes in the tube when it is penetrated by ionizing radiation. The discharges are counted and signify a measure for the radiation intensity.
The device is named for Hans Geiger who invented it in 1908, and Walther Müller who collaborated with Geiger in developing it further in 1928.
Related category
• ATOMIC AND NUCLEAR PHYSICS
Source: European Nuclear Society
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