Abstract
A computerised glow curve analysis of CaSO4:Dy Teflon environmental dosemeters was applied for fading independent dose evaluation and for the assessment of time elapsed since a single high exposure. The method is based on unfolding the glow curve into a main peak and a sub-peak using Gaussian functions, the least squares technique and a stripping procedure. If only the main peak area is used for dose evaluation the error due to fading can be reduced from 40% to about 5%. Using the fading of the low temperature peak an estimate of the time elapsed since a single high exposure can be made for known and constant storage temperature, but effects from storage temperature and storage time, which both influence the fading, could not be separated from each other.
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