Hole Self-Trapping in AY3Al5O12 and Lu3Al5O12 Garnet Crystals

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Scintillators with garnet crystals structure have attracted major attention due to their application in medical imagining, particle beam diagnostics and their usage in other modern instruments. The scintillation mechanism may be complicated and its performance can be reduced if the capture of charge carriers occurs before they can reach emission centres. This work provides a detailed description and explanation of the capture mechanism both for electrons and holes in garnet crystal structure, thus contributing to the understanding and the optimalisation of the complete group of those scintillators.

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Description

Illustration of the hole (h) and electron (e) localization in the garnet structure