Abstract
The scintillation properties of novel type of composite scintillator based on Lu3Al5O12:Pr (LuAG:Pr) single crystalline film (SCF) and LuAG:Sc substrate grown by the liquid-phase epitaxy method are considered in this work. The registration of α-particles and γ-quanta in such types of composites occurs by means of separation of the scintillation decay kinetics of SCF and crystal parts, respectively. Namely, under excitation by α-particles of 241Am (5.5 MeV) source and γ-quanta of 137Cs (662 keV) source, the large differences in the respective scintillation decay kinetics and decay time values tα and tγ are observed for the LuAG:Pr SCF/LuAG:Sc SC composite scintillator with various film thicknesses. Furthermore, the best tγ/tα ratio above 4.5 is achieved for such types of epitaxial structure with SCF and substrate thicknesses of 17 μm and about 0.5 mm, respectively. The development types of composite scintillators can be successfully applied for simultaneous registration of α-particles and γ-quanta in the mixed radiation fluxes.
Highlights
The liquid-phase epitaxy (LPE) growth technique presents a versatile method for manufacturing the single crystalline film (SCF) scintillators based on various types of oxide materials with different crystallographic structure and cation content [1]
SCF/LuAG:Pr epitaxial structures can be used for the detection of α-particles garnets were successfully grown by using the LPE method, and the scintillation properties rays by means of the differences in the pulse height spectra and decay kinetics t of respective composite scintillators were investigated [25,26,27]
The absorption spectra, cathodoluminescence (CL) spectra, scintillation light yield (LY), energy resolution and scintillation decay kinetics measurements under excitation by α–particles and γ-quanta were used for characterization of the properties of LuAG:Sc substrate and two samples LuAG:Pr SCF/LuAG:Sc SC composite scintillators
Summary
The liquid-phase epitaxy (LPE) growth technique presents a versatile method for manufacturing the single crystalline film (SCF) scintillators based on various types of oxide materials with different crystallographic structure and cation content [1]. The two types of YAG:Ce SCF/YAG:Nd SC and YAG:Ce SCF/YAG composite scintillators were grown by using the LPE method for simultaneous r composite based onasthe mentioned epitaxial structures can be in nuclear γ-quan tion of α- scintillators and β-particles, well as α- particles and X-rays orused low-energy research, radiation monitoring, microtomography and many other devices for detection of due to the low density, ρ = 4.52 g/cm, and small effective atomic num ionization radiation. SCF/LuAG:Pr epitaxial structures can be used for the detection of α-particles garnets were successfully grown by using the LPE method, and the scintillation properties rays by means of the differences in the pulse height spectra and decay kinetics t of respective composite scintillators were investigated [25,26,27]. Erties of composite scintillators based on the LuAG:Pr SCF/LuAG:Sc SC epitaxial structures grown by the LPE method
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