Luminescence characteristics and X-ray-induced defects in BaFBr:Eu storage phosphor.

Three different approaches used to synthesize a sensitive BaFBr:Eu X-ray storage photostimulated luminescence (PSL) phosphor at 850°C for 1 h in a reducing atmosphere are reported. The effects of F/Br and Eu concentration on photoluminescence (PL) and PSL sensitivities synthesized by the three approaches were compared. In the first recipe, BaFBr:Eu prepared using a BaF , BaBr and EuF mixture using solid-state diffusion (Recipe I), even in a reducing atmosphere, yielded a low PL and PSL intensity due to oxygen contamination that acted as competing hole traps.