Electron and hole trapping in Ce.sup.3+./sup.- and Pr.sup.3+./sup.-doped lutetium pyrosilicate scintillator crystals studied by electron paramagnetic resonance

0532590 - FZÚ 2021 RIV US eng J - Journal Article
Laguta, Valentyn - Buryi, Maksym - Wu, Y. - Ren, G. - Nikl, Martin
Electron and hole trapping in Ce³⁺- and Pr³⁺-doped lutetium pyrosilicate scintillator crystals studied by electron paramagnetic resonance.
Physical Review Applied. Roč. 13, č. 4 (2020), s. 1-9, č. článku 044060. ISSN 2331-7019. E-ISSN 2331-7019
R&D Projects: GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LO1409; GA ČR(CZ) GA20-12885S
Grant - others:OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institutional support: RVO:68378271
Keywords : optical materials * optical properties * electron spin resonance * defects
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.985, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevApplied.13.044060

Electron and hole trapping was 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 revealed 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 were 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. An origin of charge traps in this pyrosilicate structure and their role in scintillation mechanism is compared with the results previously described in literature on orthosilicates.
Permanent Link: http://hdl.handle.net/11104/0311033