Thermoluminescent dosimetry of beta radiations of 90 Sr/ 90 Y using ZrO2: Eu

In this work the results of studying the thermoluminescent properties (TL) of the doped zirconium oxide with europium (ZrO2: Eu3+) before beta radiations of 90Sr/ 90Y are presented. The powders of ZrO2: Eu3+ were obtained by means of the sol-gel technique and they were characterized by means of thermal analysis and by X-ray diffraction. The powders of ZrO2: Eu3+, previously irradiated with beta particles of 90Sr/ 90Y, presented a thermoluminescent curve with two peaks at 204 and 292 C respectively. The TL response of the ZrO2: Eu3+ as function of the absorbed dose was lineal from 2 Gy up to 90 Gy. The fading of the information of the ZrO2: Eu3+ was of 10% the first 2 hours remaining almost constant the information by the following 30 days. The ZrO2 doped with the (Eu3+) ion it was found more sensitive to the beta radiation that the one of zirconium oxide without doping (ZrO2) obtained by the same method. Those studied characteristics allow to propose to the doped zirconium oxide with europium like thermoluminescent dosemeter for the detection of the beta radiation. (Author)