Radiation Protection Dosimetry Vol. 111, No. 1 © Oxford University Press 2004; all rights reserved
Uncertainty evaluation of radon measurements with LR115 detector and spark counter
1 Dipartimento di Ingegneria Nucleare, Politecnico di Milano, via Ponzio 34/3, 20133 Milano, Italy
2 ARPA Lombardia, Dipartimento Città di Milano, via Juvara 22, 20129 Milano, Italy
* Corresponding author: marco.caresana{at}polimi.it
To evaluate the uncertainties for nuclear track detectors used in radon measurements, a full understanding is required of the physical phenomena involved and the behaviour of the instruments utilised in the measuring process. As it concerns the LR115 nuclear track detector, an overall evaluation of uncertainty was given. It was assessed taking into account different contributions and determining their relative weights. Since such detectors are often read by a spark counter device, a model to describe its behaviour was developed and a saturation factor was estimated. Its expression and its associated uncertainty are given. Hence, it has been possible to draw a calibration curve, in which all the uncertainty sources have been considered.
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