LuI₃:Ce-a new scintillator for gamma ray spectroscopy
Shah, K.S.; Glodo, J.; Klugerman, M.; Higgins, W.; Gupta, T.; Wong, P.; Moses, W.W.; Derenzo, S.E.; Weber, M.J.; Dorenbos, P.
Nuclear Science, IEEE Transactions on
Volume 51, Issue 5, Oct. 2004 Page(s): 2302 - 2305
Digital Object Identifier   10.1109/TNS.2004.832321
Summary:In this paper, we report on a new cerium doped, high atomic number scintillator, LuI₃:Ce, for gamma ray spectroscopy. Crystals of this material have been grown using Bridgman process. LuI₃ crystals doped with 0.5 and 5% Ce³⁺ show high light output (∼50 000 photons/MeV) and fast principal decay constant (23 to 31 ns). The Ce³⁺ emission peaks at 474 nm. Energy resolution of LuI₃:Ce coupled to photomultiplier tube (PMT) and measured at 662 keV was ∼11% [full-width at half-maximum (FWHM)]. Timing resolution of LuI₃-PMT and BaF₂-PMT detectors operating in coincidence mode was measured to be 210 ps (FWHM). Potential applications of this scintillator are discussed.

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