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LaCl3:Ce scintillator for γ-ray detection

Author:
Shah, K.S.   Glodo, J.   Klugerman, M.   Cirignano, L.   Moses, W.W.   Derenzo, S.E.   Weber, M.J.  


Journal:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment


Issue Date:
2003


Abstract(summary):

In this paper, we report on a relatively new cerium-doped scintillator—LaCl3 for γ-ray spectroscopy. Crystals of this scintillator have been grown using Bridgman method. This material when doped with 10%cerium has high light output (50,000 photons/MeV) and fast principal decay time constant (20ns). Furthermore, it shows excellent energy resolution for γ-ray detection. For example, energy resolution as low as 3.2%(FWHM) has been achieved with 662keV photons (137Cs source) at room temperature. Also, high timing resolution (264ps—FWHM) has been recorded with LaCl3-PMT and BaF2-PMT detectors operating in coincidence using 511keV positron annihilation γ-ray pairs. Details of crystal growth, scintillation properties, and variation of these properties with cerium concentration are also reported.


Page:
76-81


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