QA for calibration procedures of TLDs 100H in low doses range

Aim of this work is evaluate the performance of LiF detectors, TLD-100H, used for both environmental and radiodiagnostic dosimetry. General-Order kinetics (GOK) expressionswere applied to experimental glow curves of TLDs 100H (LiF. Mg, P, Cu), that were irradiated with an X-ray tube at 140 kVp and reading with a Riso TL/OSL-DA-10 system. New tests were introduced such as the Recuperation test, for evaluate the residual luminescent after each measurement cycle, the Recycling test, aimed to evaluate any systematic errors in the calibration curve and, at last, the Recovery test, with the purpose of evaluate the accuracy of the measured dose from each single dosimeter. The results obtained show an accuracy on the various measured doses ranging from 1.20% to 2.56%.