Prepairing LiF:Mg,Ti Dosimeter Pellets by Melting Method and Study of Stimulated Response Reduction Function for High Dose Dosimetry

Abstract

Thermoluminescence dosimeters are widely used for dosimetry in different radiation fields. In this study, the feasibility of the application of the cold-pressed sintered LiF:Mg,Ti dosimeter pellets, produced by the melting method in our TL laboratory, was investigated for gamma high dose dosimetry. The relation of sensitivity reduction with increasing of the dose is used to determine the high gamma doses. To obtain the dose response-reduction curve for these dosimeters to high doses, 60Co gamma doses between 1 to 500kGy were used. The resulting dose response-reduction curve shows a logarithmic response reduction to the absorbed dose. The correlation between the Ti dopant concentration and the range of dose response reduction curve was studied. Considering the reproducibility, this method could be used for a wide range of high doses.

Keywords

• thermoluminescence dosimeter
• lif:mg
• ti
• high dose
• tld-700
• sensitivity reduction response