期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 63, 期 2, 页码 433-438出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNS.2015.2495119
关键词
Ce4+; gamma-ray detection; LuAG; O-; scintillator; x-ray detection
资金
- Czech Science Foundation [15-18300Y]
- MEYS INGO [LG13029]
- Development of Systems and Technology for Advanced Measurement and Analysis
- Japan Science and Technology Agency (JST)
- Adaptable & Seamless Technology Transfer Program through Target-driven RD (A-STEP), JST
The role and effect of stable Ce4+ centers in Ce-doped LuAG single crystal scintillator is further studied by means of measurements of several optical, luminescence and scintillation characteristics. Two LuAG:Ce single crystal samples are compared: in one of them the dominating Ce4+ center is stabilized by high concentration Mg2+ codoping while the other one shows only the presence of stable Ce3+ center. Tailored (Eu, Mg)-doped LuAG single crystal is also prepared to test the presence and thermal stability of hole traps in the host which affect the timing characteristics of Ce4+ scintillation cycle, namely its restoration back to 4+ charge state in last step of the cycle. EPR experiment was also employed at Mg- and (Eu, Mg) doped LuAG samples and the signature of the O- hole center stabilized by Mg2+ ion was clearly obtained.
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