Optical and radioluminescence properties of Pr-doped BaTi4O9 crystals synthesized by the floating zone method

Abstract

Abstract Pr-doped BaTi4O9 crystals were grown by the floating zone method, and their optical and near-infrared (NIR) radioluminescence (RL) properties were investigated. The photoluminescence and RL properties observed comprised several sharp peaks around 630 nm due to 4f–4f transitions of Pr3+ ions. In the NIR range, strong emission peaks around 1100 nm were confirmed, and the RL intensity of 1.0% Pr-doped crystals was the highest among the prepared crystals. The minimum sensitivity of the detector was 0.3 Gy h−1 for the 1.0% Pr-doped crystal.