Transcription of Radiation Detectors - Overview
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Radiation Detectors - Overview
Radiation Detectors - Overview17/6/2010 Introduction to Radiation DetectorsTwo Categories of Detector Systems1. Passive Integrating Detector Systems- do not require power during deployment- do not record individual interactions of Radiation - might or might not need to be processed-cannot provide real time readout (usually)2-cannot provide real time readout (usually)- most passive Detectors are dosimeters- , TLD, film dosimeter2. Active Detector Systems- require power- real time readout- usually register individual interactions of Radiation - , GM detectorPassive Integrating Detector Systems3 Systems11/26/2009 General Radiation interactions produce some type of change in the detector. The accumulated change due to multiple interactions of Radiation is determined at the end of the deployment period. Passive Integrating Detector Systems4 The accumulated change is related to the quantity of interest.
• dose rate (e g mrad/hr mGy/hr) Active Detector Systems 19 dose rate (e.g., mrad/hr, mGy/hr) • dose equivalent rate (e.g., mrem/hr, mSv/hr) • activity of a source (e.g., dpm, Bq) The device used to count the pulses is either a: • rate meter, or • scaler
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