Long term study of Harshaw TLD LiF – LLD and uncertainty

Long term study of Harshaw TLD LiF has been performed in this work. The study is carried out over a period of 24 months at storage temperatures of 0 °C, 20 °C and 40 °C using more than 3500 dosimeters. The length and variations of this study may be the most comprehensive study published to date. The dosimeters are HarshawTLD LiF based cards and extremity dosimeters, which include LiF:Mg,Ti and LiF:Mg,Cu,P materials in their different isotopes, sizes and forms. There are three parts in this study: material fade in sensitivity and in signal; lower limit of detection (LLD) and uncertainty; and glow curve peaks and sensitivity change over 24 months. Part I was presented at the SSD15 (15th International Conference on Solid State Dosimetry) in Delft. This paper is the continuous work focused on Part II – the lower limit of detection and uncertainty analysis. The detailed results of each case are provided.