Abstract
0–3% Ce-doped CaYAl3O7 single crystals were grown by the optical Floating Zone method, and the photoluminescence and scintillation properties were measured. Except for the undoped sample, all the samples show photoluminescence and scintillation dominantly with a broad band around 380–520 nm due to the 5d-4f transitions of Ce3+. The decay curves are well-fitted by one or a sum of two exponential functions. The 1st and the 2nd components are due to the 5d-4f transition of Ce3+ and intrinsic luminescence in the host material, respectively. Suggested from the pulse height spectra under irradiation of γ-rays from 137Cs, the 0.3% Ce-doped CaYAl3O7 sample shows the highest scintillation light yield of 5400 ph/MeV among the present samples. The energy response exhibits proportional relationship between channel number and radiation energy in the dynamic range of 22–1408 keV.
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