Abstract
In the case of a radiological incident, large numbers of affected people should get rapid internal contamination screening, so a portable internal contamination monitor for large-scale application has been developed. It comprises dual detectors, a digital gamma spectrometer, and analysis software. Experiments carried out with a Chinese adult man model. Because of the inadequate shielding and poor detector resolution, the monitor is not sensitive to the lower energy emitters. However, it shows the excellent performance for the emitters above 661 keV. MDA for Cs-137, Y-88, and Co-60 reached 320Bq, 300Bq, and 530Bq in 5-min measurement. Due to the strong mobility, considerable detection limit, and low cost, the monitor can be applied to the rapid internal contamination screening in a radiological incident.
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