Evaluating Two Extremity Dosemeters Based on LiF:Mg,Ti or LiF:Mg,Cu,P

Evaluation of a new extremity dosemeter is presented. The dosemeter is a passive device that is easy to wear and features a permanent individual numerical ID with barcode, a watertight case, an automatic TLD reader and database management software. Two dosemeters were studied; the first consists of a 100 mg.cm-2 7LiF:Mg,Ti (TLD-700) chip and a 42 mg.cm-2 cap, the other consists of a 7 mg.cm-2 layer of 7LiF:Mg,Cu,P (TLD-700H) powder and a 5 mg.cm-2 cap. Sensitivity, repeatability, lower limit detection, angular responses and energy responses for these dosemeters are studied and presented. The dose calculation algorithm is developed and its dosimetric performance accuracy is compared with the standard ANSI N13.32-195, Performance Testing of Extremity Dosemeters.