The development of garnet based ceramic scintillators, yttrium aluminum garnet (Y5Al5O12, YAG) and lutetium aluminum garnet (Lu5Al5O12, LuAG), are of interest for medical imaging and gamma radiation detection applications. Current investigations on garnets reveal that their emission behavior can be finely tuned based on the judicious selection of lanthanide dopants (e.g., Ce, Pr, Er, Lu) and particle size. In order to better understand the effects these variables on emission behavior, we probed ceramic powders of lanthanide doped garnets synthesized from the solid state reactions with metal oxides. Dopant concentration was varied from 0.5 to 1% and phase pure materials were produced at 1000 �C. These bulk powders were used for baseline experiments for particle size comparisons and were characterized by photoluminescence (PL) and Ion beam induced luminescence (IBIL). During IBIL studies, radiation tolerance analysis was also performed to understand the microstructural stability of these materials. Full details on the synthesis and characterization will be discussed. This work was funded in part by Sandia's Laboratory Directed Research and Development (LDRD) Program. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

Probing scintillation behavior of lanthanide doped YAG and LuAG using ion beam induced luminescence

247th National Meeting (2014)

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