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The Geiger–Müller tube or G–M tube is the sensing element of the Geiger counter instrument used for the detection of ionizing radiation. It is named after Hans Geiger , who invented the principle in 1908, [ 1 ] and Walther Müller , who collaborated with Geiger in developing the technique further in 1928 to produce a practical tube that ...
A Geiger–Müller tube can detect the presence of radiation, but not its energy, which influences the radiation's ionizing effect. Consequently, instruments measuring dose rate require the use of an energy compensated Geiger–Müller tube, so that the dose displayed relates to the counts detected. [ 4 ]
However the Geiger counter can measure counts but not the energy of the radiation, so a technique known as energy compensation of the detector tube is used to produce a dose reading. This modifies the tube characteristic so each count resulting from a particular radiation type is equivalent to a specific quantity of deposited dose.
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This current is independent of the applied voltage if the device is being operated in the "ion chamber region". Ion chambers are preferred for high radiation dose rates because they have no "dead time"; a phenomenon which affects the accuracy of the Geiger–Müller tube at high dose rates.
Rate. The CD V-700 is used to detect low levels of radiation, 0 to 50 mR/h. High-radiation fields can saturate the Geiger tube, causing the meter to read a very low ...
To learn more about radiation sickness, scientists conducted tests on rats, cats, dogs, cows, sheep, pigs, and alligators. A scientist at the Hanford Site conducting radiation experiments on a ...
The model is lightweight and water resistant, with an LCD display and a plastic case, along with miniature Geiger tube (shielded against beta particles), on a single, EMP-hardened, PCB. The PDRM was able to measure radiation dose rate in the range of 0.1 to 300 centiGrays. It was designed by Plessey to use three standard 1.5 volt cells, and is ...