Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9845860 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 4 Pages |
Abstract
LaCl3:Ce and LaBr3:Ce scintillators are characterized by a high light yield and very fast nanosecond primary emission. To study scintillation mechanisms in these materials, we have measured low-temperature thermoluminescence. Both crystals exhibited prominent glow peaks below 100Â K: LaCl3:10%Ce sample showed multiple glow peaks with two major ones at 65 and 66Â K, whereas the LaBr3:0.5%Ce sample showed two major peaks at 65 and 75Â K. Assuming first-order kinetics, the traps responsible for those peaks can be described by the following parameters: E=0.168Â eV, s=1Ã1012Â sâ1; E=0.135Â eV, s=1Ã109Â sâ1 for LaCl3:Ce and E=0.144Â eV, s=1Ã1010Â sâ1; E=0.166Â eV, s=1Ã1010Â sâ1 for LaBr3:Ce. The lifetimes of listed traps at RT are in the range of radiative lifetime of Ce3+ emission (0.5-50Â ns).
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Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
J. Glodo, K.S. Shah, M. Klugerman, P. Wong, B. Higgins,