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Low temperature (~35 K) measurements of the scintillation kinetics ofY₂SiO₅: Ce(YSO:Ce) have previously illustrated that shallow electron traps can play an important role in the scintillation mechanism. In addition, divalent calcium co-doping of isostructuralLu₂SiO₅: Ce(LSO:Ce) has been shown to eliminate shallow electron traps and decrease scintillation decay time while maintaining high light output. Here we investigate the effect ofCa²⁺codoping on the trap populations and scintillation kinetics of YSO:Ce. Single crystals were grown withCa²⁺concentrations up to 0.5 at% relative to Y. Thermoluminescence measurements indicate a significant reduction in shallow traps, and a marked change in the scintillation kinetics can be seen in the scintillation time profiles as a result ofCa²⁺codoping.
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Rothfuß et al. (2009) studied this question.
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