Publications by authors named "Jiri A Mares"
In this study, we propose novel three-layer composite scintillators designed for the simultaneous detection of different ionizing radiation components. These scintillators are based on epitaxial structures of LuAG and YAG garnets, doped with Ce and Sc ions. Samples of these composite scintillators, containing YAG:Ce and LuAG:Ce single crystalline films with different thicknesses and LuAG:Sc single crystal substrates, were grown using the liquid phase epitaxy method from melt solutions based on PbO-BO fluxes.
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- The (Lu,Gd)(Ga,Al)O garnet crystals show high scintillation efficiency, with a maximum light yield of 50,000 ph/MeV.
- Recent advancements have led to the development of single-crystalline and composite film/crystal scintillators, which can distinguish between different types of particles like α, β, and γ using pulse shape discrimination.
- New findings indicate that specific compositions, especially the LuGdAlGaO:Ce film on GAGG:Ce substrate, demonstrate suitable light yields and varying decay curves for α and γ radiation, making them promising for particle identification.
This manuscript summarizes recent results on the development of composite luminescent materials based on the single-crystalline films and single crystals of simple and mixed garnet compounds obtained by the liquid-phase epitaxy growth method. Such composite materials can be applied as scintillating and thermoluminescent (TL) detectors for radiation monitoring of mixed ionization fluxes, as well as scintillation screens in the microimaging techniques. The film and crystal parts of composite detectors were fabricated from efficient scintillation/TL materials based on Ce-, Pr-, and Sc-doped LuAlO garnets, as well as Ce-doped GdAAlGaO mixed garnets, where A = Lu or Tb; x = 0-1; y = 2-3 with significantly different scintillation decay or positions of the main peaks in their TL glow curves.
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