Abstract
Pr doped (Lu,Gd)3(Ga,Al)5O12 single crystals were grown by the micro-pulling down (μ-PD) method. The crystals were greenish and transparent with 3.0mm in diameter, 10–30mm in length. Neither visible inclusions nor cracks were observed. Luminescence and scintillation properties were measured. The substitution at the Al3+ sites by Ga3+ in garnet structure has been studied. The Pr3+ 5d–4f emission is observed within 300–380nm wavelength superposed with 312nm emission line of Gd3+. Pr0.2%:Lu2.5Gd1Ga3Al2O12 shows highest emission intensity. The light yield of Pr0.2%:Lu2.5Gd0.5Ga2Al3O12 sample with diameter 3mm×1mm size was around 8000ph/MeV. Two-exponential approximations of scintillation decay showed 39.6ns (30.6%) and 151ns (69.4%) decay times.
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