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Radiation Protection Dosimetry 45:47-50 (1992)
© 1992 Oxford University Press

Improvements in Passive Etched Track Radon Detectors

J.C.H. Miles

Although etched track radon detectors are generally reliable, there is scope for improvement in their performance. In order to ensure that the detecting elements are rapidly and unambiguously identified with the place of measurement, the elements may have bar codes engraved on them and be placed in transparent holders to allow the code to be read when the element is in the holder. To allow for variations in background track density across a sheet of detector material, an area on each element may be covered to prevent exposure to radon, allowing a measurement of the background on each element. Changes in the sensitivity may be detected by irradiating a small area of each element with alpha particles from a standard source. Although etched track detectors have a very wide dynamic range, the overall range of radon levels in homes is even wider. This problem may be overcome by using a holder with two detection chambers with different sensitivities to radon.


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