Geiger-Mueller Counters Darwin L. Boyd Kent State University School of Technology.

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Presentation transcript:

Geiger-Mueller Counters Darwin L. Boyd Kent State University School of Technology

Gas Filled Counters Ion chambers Proportional counters Geiger-Mueller counters

Charged Particle Interactions Alpha particles (He nuclei) and fast electrons (beta particles) interact with matter via the Coulomb force and produce ionization - ion pairs. 30 eV per ion pair Ion pairs would like to recombine Can be collected by applying an electric field

Gas Filled Counter Image from:

Gas Filled Counters Pulse Amplitude Applied Voltage Ion chambers Proportional Counters Geiger Counters

Gamma Ray Interactions Gamma Rays (and X Rays) do not interact via the Coulomb force Must undergo a “catastrophic” event Result is a fast electron “Catastrophic” event usually occurs in the walls of gas filled detectors

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