Thermoluminescence dosimetry characteristics of MgSO 4 : Eu microcrystalline in gamma radiation

Abstract

MgSO 4 : Eu microcrystalline was synthesized by solid state method. For insurance of true formation of MgSO 4 and of course presence of Eu impurity into lattice, EDS test was done. The most TL sensitivity was observed in 0.5 mol % Eu impurity. Two main peak was observed in TL glow curve of MgSO 4 : Eu after gamma irradiation: 151 and MgSO 4 Eu Microcrystalline Thermoluminescence Kinetic parameters 197 ◦ C. For this material the linear dose response range was determined in 0.1–50Gy. Also, its reusability and fading were tested and results were satisfying. TL sensitivity of our MgSO 4 : Eu was about 6 times more than that of TLD-100 after 500 mGy Gamma irradiation. Kinetic parameters such as order of kinetics (b), activation energy (E) and frequency factor (s) obtained by different methods including computerized glow curve deconvolution, variable heating rate, isothermal decay and initial rise methods. The result obtained by these methods were in good agreement.