The crystals of (Lu,Gd)3(Ga,Al)5O12 multicomponent garnets with high density ρ and effective atomic number Zeff are characterized by high scintillation efficiency and a light yield value up to 50,000 ph/MeV. During recent years, single-crystalline films and composite film/crystal scintillators were developed on the basis of these multicomponent garnets. These film/crystal composites are potentially applicable for particle identification by pulse shape discrimination due to the fact that α-particles excite only the film response, γ-radiation excites only the substrate response, and β-particles excite both to some extent. Here, we present new results regarding scintillating properties of selected (Lu,Gd)3(Ga,Al)5O12:Ce single-crystalline films under excitation by alpha and beta particles and gamma ray photons. We conclude that some of studied compositions are indeed suitable for testing in the proposed application, most notably Lu1.5Gd1.5Al3Ga2O12:Ce film on the GAGG:Ce substrate, exhibiting an α-particle-excited light yield of 1790-2720 ph/MeV and significantly different decay curves excited by α- and γ-radiation.

CERN Experimental Physics Department 1 Esplanade des Particules 1211 Geneva Switzerland

Crytur Ltd Na Lukach 2283 51101 Turnov Czech Republic

Faculty of Nuclear Sciences and Physical Engineering Czech Technical University Prague Brehova 7 11519 Prague Czech Republic

Institute for Scintillation Materials NAS of Ukraine 60 Nauky Ave 61072 Kharkiv Ukraine

Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 16253 Prague Czech Republic

Institute of Physics Kazimierz Wielki University in Bydgoszcz Powstańców Wielkopolskich Str 2 85090 Bydgoszcz Poland

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