Dr. Gian Paolo Pazzi, IFAC-CNR, Florence, Italy (NPD)
Dr. Martin Nikl, IP, Prague, Czech Republic (PPD)
Dr. Anna Vedda, DMS-University of Milan-Bicocca, Milan, Italy
Dr. Svetlana Zazubovich, IP University of Tartu, Tartu, Estonia
Dr. Karel Blazek, CRYTUR Ltd., Turnov, Czech Republic

• Ce-doped aluminium perovskite (Lu_xY_1-xAlO₃:Ce)
• Ce-doped aluminium garnets Lu₃Al₅O₁₂:Ce
• (doubly) doped lead tungstate (PbWO₄:A,B) single crystals
• Ce(Tb)-doped Gd-rich phosphate glasses

• Crystals of Lu_0.3Y_0.7AlO₃:Ce were grown, optical samples were prepared and tested for selected optical and scintillation characteristics and their sample-to-sample variation, co-doping by Zr was accomplished and optimum doping levels determined. Chemical procedure was developed to be able to apply the ICP analysis for perovskite and garnet materials.
• Doubly doped YAP: and Lu_0.3Y_0.7AlO₃:(Ce,Zr) aluminium perovskites were prepared and characterised, positive effect of Zr doping was found in the decrease of TSL-related traps and speed-up of scintillation response, optimum doping concentrations were determined.
• Irregular luminescence centres are under systematic study in low concentration YAP:Ce (50 ppm). Two different irregular sites of Ce³⁺ and two different defrect-based red emission bands were revealed.
• Luminescence and scintillation mechanism was studied in Ce-doped LuAG, optimum concentration of 0.06% was established based on overall scintillation efficiency. Energy transfer processes between self-trapped exciton of LuAG matrix and Ce³⁺ are under systematic study.
• Cd and Mo-doped PbWO₄ crystals were prepared and characterised for optical and scintillation characteristics, slow decay components were carefully studied.
• Doubly doped PbWO₄ (Mo,Y) crystals were prepared and studied, noticeably increased LY and comparable scintillation response speed was found with respect to an undoped PWO. Another (Mo,Nb) doubly doped PWO was developed, which has shown high steady-state radioluminescence efficiency comparable with BGO, another pentavalent codopants as Ta or V have shown similar performance. Ba-codoping has shown positive effect on total radioluminescence efficiency, while F-doping does not show positive effects contrary to the recent literature data.
• Excited state dynamics study in PWO:Mo evidenced ionisation of both STE and (MoO₄)^2- emission centres and band-to-band nonradiative recombination of electron and holes was determined as the main loss channel in PWO scintillator
• Ce,Tb and Mn-doped Na-Gd phosphate glasses were prepared and studied for optical and radioluminescence characteristics, optimum composition was found for maximum radioluminescence output (Na67Gd30Ce3, Na60Gd30Tb10, Na60-65Gd30Mn5-10 - mol.% of related phosphates in the melt). Maximum radioluminescence effciency was achieved of about 10-15% of CsI:Tl only.
• Non-equivalent Ce³⁺ and Mn²⁺ centres were evidenced in phosphate glass matrix, while no such centres were revealed in single crystal YAP matrix.
• Limited Gd-Gd diffusion was concluded in these phosphate glasses, which lowers performance of these materials with respect to similar crystal systems.

• Dependence of YAG:Ce and YAP:Ce luminescence and scintillation characteristics on host purity
• VUV excitation in the study of defect creation and STE-Ce³⁺ energy transfer in LuAG
• F-doped and Ba-codoped PWO:Mo – luminescence and scintillation characteristics, LY values
• Technology will continue with the study of preparation of Lu-rich mixed crystals Lu_xY_1-xAP:Ce (x > 0.8) in close feedback with optical characterisation.
• Optimisation of LuAG:Ce technology, 5N Lu₂O₃ will be purchased for next generation of crystals

• Zr-codoping of YAP matrix was implemented at CRYTUR Ltd. industrial production
• Scintillation decay measurement and evaluation is being implemented at CRYTUR following the experiment established in IP Prague

• ENEA Casaccia, INN/TEC/IRR, S.Maria di Galeria (Roma), Italy (Dr.S.Baccaro), phosphate glasses
• Technical University of Liberec, Czech Republic (Dr. M. Sulc), on-line radiation damage-PWO and perovskites
• Dept. Of Radiation Chemistry, Technical University of Prague (prof. M.Mucka), PWO and perovskites
• Laboratory of Luminescence, I.F.University, Lviv, Ukraine (prof. A.Voloshinovskii), perovskites and garnets