Glow curve analysis of long-term stability of LiF:Mg,Cu,P as compared to LiF:Mg,Ti

Abstract

Over a six month period, the long-term stability of LiF:Mg,Cu,P (GR-200A, Beijing China) was compared with LiF:Mg,Ti (GR-100, Beijing China). This is of particular interest in applications where there can be considerable variations in the time intervals between TLD preparation, irradiation and readout, such as environmental, accident personal and mailed dosimetry. For each TLD material, slow and fast cool-down anneals, characteristic of those used in the above-mentioned applications, were employed to study the effect of annealing procedure on long term stability. An analytical approximation based on the Randall-Wilkins model employing first order kinetics was used to fit individual peaks. Gl..