Luminescent and scintillation properties of CeAlO3crystals and phase-separated CeAlO3/CeAl11O18metamaterials

Abstract

This work is dedicated to the growth process and investigation of luminescent and scintillation properties of CeAlO3single crystals and CeAlO3/CeAl11O18metamaterials under e-beam and α-particles excitation. It has been shown that cathodoluminescence and radioluminescence spectra of CeAlO3crystals contain two bands, peaking at 440 and 500 nm, and caused by the Ce3+5d–4f transitions into CeAl11O18phase, which is present in these crystals as an admixture. Under 270 nm ultraviolet (UV) light excitation, a CeAlO3crystal possesses complicated non-exponential luminescence decay, with the average decay time of 16 ns. The light yield of CeAlO3crystals under α-particle excitation is about 16% and 12%, in respect to the standard Bi4Ge3O12(BGO) crystal and Y3Al5O12:Ce (YAG:Ce) single crystalline film samples, respectively. The CeAlO3scintillation decay is quite fast, with the decay time value t1/ein the 54–56 ns range.