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Abstract
The dependence of thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of LiMgPO4:Tb,Sm,B samples prepared by the high-temperature solid-state method on maximum heating temperatures was investigated for the first time. The TL glow curves showed the ratio of peak 3 to peak 2 increased with the increase of maximum heating temperature. The influence of OSL on maximum heating temperatures showed that the sensitivity of OSL reached the maximum at the maximum heating temperature of 1000°C, which is 11.6 times higher than that of 800 °C. The relative standard deviation of the repeatability is less than 1.5% regardless of the maximum heating temperature. The minimum measurable dose (MMD) could be significantly improved by optimizing OSL parameters, such as maximum heating temperature and readout time. The MMD as low as 0.31 µGy has been achieved. The residual OSL is up to 92.3% after irradiation for 24 h. LiMgPO4:Tb,Sm,B is highly sensitive to the maximum heating temperature. Considering fast decay time, high OSL sensitivity, good repeatability, low MMD and little fading, it is recommended that the maximum heating temperature of LiMgPO4:Tb,Sm,B is 1000°C. LiMgPO4:Tb,Sm,B has great potential for daily personal and environmental cumulative dose monitoring.
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Notes on contributors
L. Fu
L. Fu, is currently a research assistant in the State Key Laboratory of NBC Protection for Civilian and is pursuing a doctor's degree. She is mainly engaged in the research of optically stimulated luminescence, thermoluminescence and radiation detectors related fields.
H. Cui
H. Cui, is currently an associate professor in the State Key Laboratory of NBC Protection for Civilian. His current research interests include optically stimulated luminescence, thermoluminescence and nuclear radiation monitoring related fields.
H. J. Fan
H. J. Fan, is currently a research assistant in the State Key Laboratory of NBC Protection for Civilian and is pursuing a doctor's degree. His current research interests include crystal growth and optically stimulated luminescence measurement technology.
M. Zhou
M. Zhou, received her Master of Engineering degree from College of Nuclear Science and Technology, Beijing Normal University, is currently pursuing a doctor's degree in the State Key Laboratory of NBC Protection for Civilian, is mainly engaged in the research of optically stimulated luminescence radiation materials.
S. Y. Zhang
S. Y. Zhang, received her Master of Engineering degree from the State Key Laboratory of NBC Protection for Civilian, where she is currently pursuing a doctor's degree, is mainly engaged in the research of optically stimulated luminescence radiation materials and nuclear radiation measurement technology.
Z. Y. Li
Z. Y. Li, is currently an associate professor in the State Key Laboratory of NBC Protection for Civilian and is pursuing a doctor's degree. His current research interests include gas detectors and nuclear radiation detection related field.
Z. G. Wang
Z. G. Wang, is currently an associate professor in the State Key Laboratory of NBC Protection for Civilian, His current research interests include scintillator materials growth and fabrication of radiation detectors, and other nuclear science and technology fields.
K. Y. Tang
K. Y. Tang, is currently a professor in the State Key Laboratory of NBC Protection for Civilian. He has worked extensively in the fields of thermoluminescence, and his current research interests include radioluminescence, optically stimulated luminescence and nuclear radiation measurement technology fields.