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proportional counter |
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proportional counter [prə′pȯr·shən·əl ′kau̇nt·ər] (nucleonics) A radiation counter consisting of a proportional counter tube and its associated circuits; resembles a Geiger-Müller counter, but with a different counting gas (argon methane) and a lower voltage on the tube; used to measure α, β, and x-rays; has low sensitivity for γ-radiation. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The Spectro Phoenix unit utilizes an x-ray tube as its source of excitation, and a proportional counter as its detection system. Besides the limitations of increased sample heating, large focused electron beams from higher beam currents, and beam current stability, there are processes within the proportional counter and detector electronics limiting the count rate. Two of the devices were position-sensitive proportional counters. |
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