Optically Stimulated Luminescence in an Imaging Plate Using BaFI:Eu

• Published in: Radiation protection dosimetry 2002-01, Vol.100 (1-4), p.385-388
• Main Authors: Nanto, H., Araki, T., Daimon, M., Kusano, E., Kinbara, A., Kawabata, K., Nakano, Y.
• Format: Article
• Language: English
• Subjects: Barium Compounds - chemistry; Barium Compounds - isolation & purification; Barium Compounds - radiation effects; Biological and medical sciences; Europium - chemistry; Fluorides - chemistry; Fluorides - isolation & purification; Fluorides - radiation effects; Iodides - chemistry; Iodides - isolation & purification; Iodides - radiation effects; Luminescent Measurements; Medical sciences; Optics and Photonics; Radiochemistry; Spectrophotometry; Thermoluminescent Dosimetry - instrumentation; Thermoluminescent Dosimetry - methods; X-Rays
• ISSN: 0144-8420; 1742-3406
• DOI: 10.1093/oxfordjournals.rpd.a005895

BaFI:Eu phosphors are fabricated using a new method of synthesis: liquid phase synthesis, in which the phosphor particles are formed through the association of Ba2+ ions, F- ions and Eu2+ ions in solution. An intense optically stimulated luminescence (OSL) peak at about 410 nm is observed by stimulating X ray irradiated BaFI:Eu phosphor with about 550-750 nm light. It is found that the peak wavelength of the optically stimulation spectrum is about 690 nm. This result suggests that the semiconductor laser can be used as the stimulating light source. It is also found that the OSL intensity is increased with increasing the X ray dose. The BaFI:Eu phosphor as a photostimulable material for the imaging place of a computed radiography system provides the following advantages: (1) high X ray absorption coefficient, (2) high monodispersion in size which would contribute to sharp images, (3) high OSL and thus low luminescence mottle and (4) high DQE (detective quantum efficiency).