Optical and scintillation properties of Pr3+ activated KY3F10 with different dopant concentration

Single crystalline Pr 1 and 5% doped KY₃F₁₀ scintillators were fabricated by Tokuyama Corp. In photoluminescence, they showed intense Pr³⁺ 5d-4f transition at 300 nm under 210 nm excitation with primary decay time of few ns. In X-ray induced scintillation spectra, they also exhibited intense Pr³⁺ 5d-4f emission around 300 nm. Scintillation decay times of Pr 1 and 5% doped KY₃F₁₀ were 4.5 and 2.5 ns, respectively. Scintillation light yields of Pr 1 and 5% doped KY₃F₁₀ were 700 and 300 ph/5.5 MeV-α in pulse height analysis.