Scintillation Characteristics of Pr-doped Gd2Si2O7 Single Crystal

Pr-doped gadolinium pyrosilicate, which had a composition of Gd 2 Si 2 O 7 , was synthesized by the floating zone method with different Pr concentrations from 0.1 to 2.0 mol%.After confirming the crystal phase by X-ray diffraction analysis, photoluminescence (PL) and scintillation properties were investigated.PL emission spectra showed a broad emission peak at 340-360 nm due to Pr 3+ 5d-4f transition, and decay times were around 9-12 ns.In X-ray-induced scintillation spectra, we confirmed a similar spectral shape with PL, and scintillation decay times were around 18-29 ns.In the 137 Cs γ-ray-irradiated pulse height measurement, the 1.0% Pr-doped sample had shown the highest scintillation light yield of 2290 ph/MeV among the present samples.In the same setup, we also used different γ-ray sources to check the energy response linearity.Finally, energy resolution as a function of γ-ray energy was investigated.