Effects of two strategies on afterglow behavior of Lu2O3:Eu single crystal scintillator: Co-doping with Pr3+ and solid solution with Sc2O3 |
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| Affiliation: | 1. School of Materials and Engineering, Shanghai University, Shanghai 200444, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China;1. P. G. Department of Physics, Smt. KRP Kanya Mahavidyalaya, Islampur, MS, 415409, India;2. Department of Physics, Shivaji University, Kolhapur, MS, 416004, India;3. Departments of Physics, PDVP Mahavidyalaya, Tasgaon, MS, 416 312, India;4. Department of Physics, Sadguru Gadage Maharaj College, Karad, MS, 415110, India;1. Insititute of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China;2. National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065, China;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Northwest Institute of Nuclear Technology, Xi’an 710024, China;4. Tsinghua University, Beijing 100084, China |
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| Abstract: | 
In this paper, effect of two strategies on afterglow behavior of Lu2O3:Eu single crystal scintillator, Pr3+ co-doping and solid solution with Sc2O3, were studied systematically. Two groups of Lu2O3:5 at%Eu,x at%Pr (x = 0, 0.2, 0.5, 1, 2 and 5) and (Lu1–yScy)2O3:5 at%Eu (y = 0, 20 at%, 50 at% and 70 at%) single crystals were grown by floating zone (FZ) method in air atmosphere. The structures of as-grown crystals were determined by X-ray diffraction (XRD). The scintillation, photoluminescence properties and carrier trap states were investigated through afterglow, X-ray excitation luminescence (XEL), transmittance, photoluminescence excitation (PLE) and photoluminescence (PL), PL decay and thermal stimulated luminescence (TSL) curves. It is found that with the increase of Pr3+ concentration, the afterglow level of the system decreases at the expense of scintillation luminescence efficiency. Meanwhile, although Sc2O3:Eu presents much lower afterglow intensity than Lu2O3:Eu, the addition of Sc2O3 will just increase the afterglow level of the (Lu1–yScy)2O3:5 at%Eu single crystal system. Possible mechanisms for above phenomena are discussed based on experimental results. |
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| Keywords: | Afterglow behavior Rare earths |
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