Article ID Journal Published Year Pages File Type
9845849 Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2005 5 Pages PDF
Abstract
The scintillation mechanism model in the complex structure oxide crystals is developed. It describes the creation of excited Ce3+ ion ensemble under ionizing radiation, particularly the last stage of the process, when the excited matrix states interact with Ce3+ ions. It was shown that the mechanism of scintillation is different for Y-and Lu-based crystals. The energy transfer mechanism from self-trapped excitons and holes to Ce3+ ions dominates in Y-based crystal. When Lu ion forms the perovskite matrix host, the consecutive charge transfer process Ce3++h→Ce4+ and Ce4++e→(Ce3+)*→Ce3++hv dominates the creation of excited Ce3+ ions. The developed model describes the scintillation kinetics and light yield changes vs. concentration and temperature. Good agreement of the calculated data and experimental results obtained by different authors is observed.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Instrumentation
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