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31 August 2005 Scintillation properties of K2LaBr5:Ce3+ crystals for gamma-ray spectroscopy
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In this paper, we report on the growth of a relatively new scintillator from the crystal K2LaX5 family (X=Cl, Br, I), K2LaBr5:Ce3+, and its scintillation properties for γ-ray spectroscopy. The material was synthesized by reacting stoichiometric amounts of LaBr3 and KBr. Prior to synthesis, the material was heated under dynamic vacuum to remove water molecule from the starting material. The synthesized material was then mixed with 10 mol % CeBr3, subsequently sealed in an evacuated quartz ampule. The crystals were grown by vertical Bridgman growth technique. An energy resolution of ~ 5% (FWHM) for the 662 KeV gamma ray was obtained with an encapsulated K2LaBr5:Ce3+ scintillator. The light yield non-proportionality achieved versus the energy range of 31 KeV to 1333 KeV was about 3%.
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Utpal N. Roy, Kunle Adio, Michael Groza, Yunlong Cui, and Arnold Burger "Scintillation properties of K2LaBr5:Ce3+ crystals for gamma-ray spectroscopy", Proc. SPIE 5922, Hard X-Ray and Gamma-Ray Detector Physics VII, 592206 (31 August 2005);

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