Gaseous ionization detectors are radiation detection instruments designed to seek in particle physics the presence of ionising particles (a particle detector), and in general radiometric practice and radiation protection, to measure Ionising radiation.
They use the ionising effect of radiation upon a gas-filled sensor. If a particle has enough energy to ionize a gas atom or molecule, the resulting electrons and ions cause a current flow which can be measured.
Gaseous ionisation detectors form an important group of instruments used for radiation detection and measurement. This article gves a quick overview of the principal types, and more detailed information can be found in the articles on each instrument. The accompanying plot shows the variation of ion pair generation with varying applied voltage for constant incident radiation. There are three main practical operating regions, one of which each type utilises.
Read more about Gaseous Ionization Detectors: Types, Guidance On Detector Type Usage, Everyday Use
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