1. The Stable Ce^4 + Center: A New Tool to Optimize Ce-Doped Oxide Scintillators.
- Author
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Nikl, Martin, Babin, Vladimir, Pejchal, Jan, Laguta, Valentin V., Buryi, Maksym, Mares, Jiri A., Kamada, Kei, Kurosawa, Shunsuke, Yoshikawa, Akira, Panek, Dalibor, Parkman, Tomas, Bruza, Petr, Mann, Klaus, and Muller, Matthias
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INORGANIC scintillators , *CERIUM compounds , *DOPING agents (Chemistry) , *LUMINESCENCE , *THERMAL stability , *X-ray detection - Abstract
The role and effect of stable Ce^4+ 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 Ce^4 + center is stabilized by high concentration Mg^2+ codoping while the other one shows only the presence of stable Ce^3 + 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 Ce^4+ 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 Mg^2 + ion was clearly obtained. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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