Point defects and impurities play a major role in optical properties of scintillators, as they can be at the origin of afterglow emission, which are detrimental for the applications. Spectrally-resolved thermally stimulated luminescence (TSL) is used here to study defects possibly affecting scintillation properties of LaCl3:Ce and LaBr3:Ce samples grown by Saint-Gobain Crystals & Detectors. In the case of LaCl 3:Ce, after X-ray irradiation two major glow peaks with complex structures are detected at 23 K and 63 K (when measured at a heating rate of 0.1 K/s). A more composite structure of the TSL pattern of LaBr3:Ce is observed. Possible explanations and implications of these findings are discussed.
Sellès, O., Fasoli, M., Vedda, A., Martini, M., Gourier, D. (2007). Thermoluminescence study of cerium-doped lanthanum halides. PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS, 4(3), 1004-1007 [10.1002/pssc.200673881].
Thermoluminescence study of cerium-doped lanthanum halides
FASOLI, MAURO;VEDDA, ANNA GRAZIELLA;MARTINI, MARCO;
2007
Abstract
Point defects and impurities play a major role in optical properties of scintillators, as they can be at the origin of afterglow emission, which are detrimental for the applications. Spectrally-resolved thermally stimulated luminescence (TSL) is used here to study defects possibly affecting scintillation properties of LaCl3:Ce and LaBr3:Ce samples grown by Saint-Gobain Crystals & Detectors. In the case of LaCl 3:Ce, after X-ray irradiation two major glow peaks with complex structures are detected at 23 K and 63 K (when measured at a heating rate of 0.1 K/s). A more composite structure of the TSL pattern of LaBr3:Ce is observed. Possible explanations and implications of these findings are discussed.
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