Title :
LuI3:Ce-a new scintillator for gamma ray spectroscopy
Author :
Shah, K.S. ; Glodo, J. ; Klugerman, M. ; Higgins, W. ; Gupta, T. ; Wong, P. ; Moses, W.W. ; Derenzo, S.E. ; Weber, M.J. ; Dorenbos, P.
Author_Institution :
Radiat. Monitoring Devices Inc., Watertown, MA, USA
Abstract :
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.
Keywords :
gamma-ray detection; gamma-ray spectroscopy; photomultipliers; solid scintillation detectors; 210 ps; 474 nm; BaF2-PMT detectors; Bridgman process; Ce3+ emission peaks; LuI3 crystals; LuI3-PMT detectors; LuI3:Ce; cerium doped high atomic number scintillator; coincidence mode; decay constant; energy resolution; full- width at half-maximum; gamma ray spectroscopy; photomultiplier tube; timing resolution; Cerium; Crystalline materials; Energy measurement; Energy resolution; Geologic measurements; Photomultipliers; Photonic crystals; Solid scintillation detectors; Spectroscopy; Timing;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2004.832321
