Interpretation of Thermoluminescence Dosimetry System from the Information Theory Perspective

Shannon’s information theory expresses that reduction in entropy of a communication system quantifies the increase in information one receives about the system. In this work, the thermoluminescence (TL) dosimetry system is investigated from this perspective. It is supposed that the quantum energy of radiation is transmitted by the TLD chip and is converted to the TL light(s) by the TLD reader. Hence, we get some information about the TL system. To examine this concept, the TL responses of GR-200 chips (irradiated with 90 Sr beta rays, 60 Co gamma rays) and TLD-600 chips (irradiated with thermal neutrons) before and after irradiation with different dose-equivalents are determined. Shannon’s entropy is calculated using the measured glow curves (GCs). The results show that while the TL response increases after irradiation, the entropy decreases and then remains stable with the increase in dose-equivalent. Furthermore, the maximum transmission rate of TL lights increases by the dose-equivalent.