Investigation on Thermoluminescence of Al2O3:C and LiF:Mg,Cu,P to Natural Background Radiation

• Main Authors: Li Yongqiang, Chen Jingmin, Xiong Zhengye, Wang Wenhua, Tang Zhao, Shi Wenqing, Li Shiping
• Format: Conference Proceeding
• Language: English
• Subjects: Al2O3; Aluminum oxide; Heating; LiF; Sensitivity; Temperature measurement; Temperature sensors; Thermoluminescence; Thermoluminescence (TL)
• DOI: 10.1109/iCBEB.2012.255

To choose the best thermo luminescent dosimeters (TLDs) for low radiation dose detector, thermo luminescence responses of three kinds of TLDs, Al 2 O 3 : C and LiF: Mg, Cu, P, were measured, and the natural background radiation in Zhanjiang is used as a low radiation field. The TLDs' sensitivities were compared, Al 2 O 3 :C (the threshold dose of is about 1-2μGy) is in some sort more sensitive than LiF:Mg, Cu, P (the threshold dose of is about 2μGy). Temperature of glow peak of Al 2 O 3 :C is not so high, and the TL would decay after a relatively long period, so the TL dose response curve of Al 2 O 3 :C is deviation from linearity. Temperatures of glow peaks of LiF:Mg, Cu, P are relatively high, and the TL would hardly decay after a relatively long period, so the TL dose response curves are nearly linearity. In a word, Al 2 O 3 :C is not the best TLD in low radiation cumulative dose detection, although it is the best optically stimulated luminescence dosimeter (OSLD).