Scintillation Properties of Praseodymium Doped LuAG Scintillator Compared to Cerium Doped LuAG, LSO and

• Published in: IEEE transactions on nuclear science 2009-08, Vol.56 (4), p.2499-2505
• Main Authors: Swiderski, L., Moszynski, M., Nassalski, A., Syntfeld-Kazuch, A., Szczesniak, T., Kamada, K., Tsutsumi, K., Usuki, Y., Yanagida, T., Yoshikawa, A., Chewpraditkul, W., Pomorski, M.
• Format: Article
• Language: English
• Subjects: Aluminum; Cerium; Crystals; Decay time constant; Energy measurement; Energy resolution; Garnets; Lanthanum; LSO; LuAG; non-proportionality; Pulse measurements; Shape measurement; Time measurement; time resolution
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2009.2025040

Properties of praseodymium and cerium doped Lutetium Aluminum Garnet (LuAG) were compared with cerium doped Lutetium Oxyorthosilicate (LSO) and Lanthanum Bromide (LaBr 3 ). Light yield, its non-proportionality relative to 662 keV gamma -rays and the dependence of the energy resolution on energy of the detected gamma -rays were measured. LuAG:Pr turned out to have good proportionality, with deviation from unity around 10% at 16.6 keV and 3% at 59.5 keV. This, together with relatively high light yield of 5600 phe/MeV results in a very good energy resolution of LuAG:Pr of 5.1% measured with 662 keV gamma-rays. The measured time resolution of 308 ps is significantly larger than that of 166 ps obtained for LSO:Ce. This can be explained by smaller light yield of LuAG:Pr and the fact that only about 25% of its scintillation is emitted in short decay time modes of 17.6 ns and 52 ns, while the rest is decaying with long time modes of 1.4 mus and 9 mus.