Reassessment of doses in TLD100 by measuring the residual dose

Second readouts of TLD 100 crystals exposed to radiation are used to reassess high doses. When the second readout is performed by a regular readout cycle of 13.3 s, the accuracy of the estimations is too low to be practical for low doses in the 10–100 mSv range. A simple and efficient method was studied, which consists of expanding the heating time to 30 s. The efficiency relative to a 13.3 readout time is about three timesbetter, and also the background is lower, thus the reassessment efficiency is significantly improved.