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Electron and Hole Trapping in Ce3+- and Pr3+-Doped Lutetium Pyrosilicate Scintillator Crystals Studied by Electron Paramagnetic Resonance
Laguta, V; Buryi, M; Wu, Y; Ren, G; Nikl, M
2020-04-23
Source PublicationPHYSICAL REVIEW APPLIED
ISSN2331-7019
Issue4
SubtypeArticle
AbstractElectron and hole trapping is studied in the Ce3+- and Pr3+-doped Lu2Si2O7 scintillation single crystals (LPS:Ce and LPS:Pr) by electron paramagnetic resonance (EPR). Detailed EPR measurements of the x-ray irradiated LPS crystals reveal that holes generated by irradiation are predominantly trapped at oxygen lattice ions creating O- centers. The same x-ray irradiation creates also electron-type centers, which are attributed to Lu2+ ions, where the trapped electron at the Lu lattice ion is stabilized by a nearby defect, such as the oxygen vacancy and Ir3+ impurity ion. Both the hole and electron centers can be thus considered as a bound small polaron, which makes the charge trapping in a scintillation mechanism quite competitive. The hole O- and electron Lu2+ centers show thermal stability well above room temperature. Thermal decays of their concentrations correlate well with the appearance of the thermally stimulated luminescence glow peaks at 470-550 K. The presence of the same intrinsic traps in the Ce- and Pr-doped LPS crystals suggests that the difference in the light yield of these crystals is an intrinsic property of the Ce3+ and Pr3+ activator centers in the LPS lattice. An origin of charge traps in this pyrosilicate structure and their role in the scintillation mechanism is compared with the results previously described in the literature on orthosilicates.
DOI10.1103/PhysRevApplied.13.044060
WOS KeywordLUMINESCENCE ; PR3+ ; DEFECTS ; TRAPS
Language英语
WOS Research AreaPhysics
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28119
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Laguta, V,Buryi, M,Wu, Y,et al. Electron and Hole Trapping in Ce3+- and Pr3+-Doped Lutetium Pyrosilicate Scintillator Crystals Studied by Electron Paramagnetic Resonance[J]. PHYSICAL REVIEW APPLIED,2020(4).
APA Laguta, V,Buryi, M,Wu, Y,Ren, G,&Nikl, M.(2020).Electron and Hole Trapping in Ce3+- and Pr3+-Doped Lutetium Pyrosilicate Scintillator Crystals Studied by Electron Paramagnetic Resonance.PHYSICAL REVIEW APPLIED(4).
MLA Laguta, V,et al."Electron and Hole Trapping in Ce3+- and Pr3+-Doped Lutetium Pyrosilicate Scintillator Crystals Studied by Electron Paramagnetic Resonance".PHYSICAL REVIEW APPLIED .4(2020).
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