Dependence of the LR-115 radon detector calibration factor on track density

The reliability and accuracy of the methodology based on using LR-115 track detectors for radon measurements have been studied by determining the dependence of their calibration factors on radon exposure at levels reaching 13 MBq m(-3) h. This factor results not constant and demonstrated a decreasing exponential trend vs. exposure that has been explained in terms of the saturation effect and verified using a numerical simulation. This dependence does not affect the parameter that normalizes track density vs. film thickness. This parameter results constant and equal to - 0.30 +/- 0.02 cm(-2)/mu m in the 300-8000 kBq h m(-3) exposure range. (c) 2013 Published by Elsevier Ltd.