The stable Ce.sup.4+./sup. center: a new tool to optimize Ce-doped oxide scintillators

0460565 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Nikl, Martin - Babin, Vladimir - Pejchal, Jan - Laguta, Valentyn - Buryi, Maksym - Mareš, Jiří A. - Kamada, K. - Kurosawa, S. - Yoshikawa, A. - Pánek, D. - Parkman, T. - Brůža, Petr - Mann, K. - Müller, M.
The stable Ce⁴⁺ center: a new tool to optimize Ce-doped oxide scintillators.
IEEE Transactions on Nuclear Science. Roč. 63, č. 2 (2016), s. 433-438. ISSN 0018-9499. E-ISSN 1558-1578
Grant CEP: GA ČR GJ15-18300Y; GA MŠMT(CZ) LG13029
GRANT EU: European Commission(XE) 644260 - INTELUM
Institucionální podpora: RVO:68378271
Klíčová slova: Ce⁴⁺ * gamma-ray detection * LuAG * scintillator * X-ray detection
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.171, rok: 2016

The role and effect of stable Ce⁴⁺ centers in Ce-doped LuAG single crystal scintillator was studied by means of measurements of several optical, luminescence and scintillation characteristics. Two LuAG:Ce single crystal samples were compared: in one of them the dominating 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 was 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 ion was clearly obtained.
Trvalý link: http://hdl.handle.net/11104/0261835