Journal
CHEMPHYSCHEM
Volume 18, Issue 5, Pages 493-499Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201601190
Keywords
Ca codoping; cerium; energy transfer; scintillator; yttrium aluminium perovskite
Funding
- European Union [644260]
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The influence of Ca codoping on the optical absorption, photo-, radio-, and thermo-luminescence properties of YAlO3:Ce (YAP:Ce) crystals has been studied for four different calcium concentrations ranging from 0 to 500ppm. Ca codoping results in a partial oxidation of Ce3+ into Ce4+, The luminescence time response under pulsed X-ray excitation of the Ce3+/Ce4+ admixure clearly demonstrates the role of hole migration on both the rise time and the generally observed slow components. From an application point of view, Ca codoping significantly improves the timing performances, but the induced presence of Ce4+ ions is also the cause of a reduction in scintillation efficiency.
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