Abstract
Ce–doped Ca(Gd,Y)Al3O7 single crystals were synthesized by the optical floating zone method, and the photoluminescence and scintillation properties were evaluated. Photoluminescence and scintillation with a broad band around 420 nm are observed in all the samples. The decay curves are well–approximated by a sum of two exponential functions, which are due to the 5d–4f transition of Ce3+ and intrinsic luminescence in the host material. As a result of the pulse height spectra under γ–rays irradiation from 241Am, the CaYAl3O7 sample shows the highest scintillation light yield of 6500 ph/MeV among the present samples.
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