Optically stimulated luminescence in an imaging plate using BaFi:Eu

Area of Science:

• Materials Science
• Luminescence
• Radiography Imaging

Background:

• Barium Fluoride Iodide doped with Europium (BaFI:Eu) phosphors are investigated for photostimulable applications.
• Computed radiography (CR) systems require advanced imaging plates with high performance characteristics.

Purpose of the Study:

• To develop and characterize a novel BaFI:Eu phosphor synthesized via liquid phase synthesis.
• To evaluate the potential of this BaFI:Eu phosphor for use in CR imaging plates.

Main Methods:

• Liquid phase synthesis was employed to fabricate BaFI:Eu phosphor particles.
• Optical stimulation spectroscopy and X-ray irradiation were used to analyze luminescence properties.
• The phosphor's performance was assessed based on X-ray absorption, particle size, OSL intensity, and detective quantum efficiency (DQE).

Main Results:

• An intense optically stimulated luminescence (OSL) peak at 410 nm was observed upon stimulation with 550-750 nm light.
• The peak wavelength of the optical stimulation spectrum was identified at 690 nm, suggesting semiconductor laser compatibility.
• OSL intensity demonstrated a positive correlation with increasing X-ray dose.
• The BaFI:Eu phosphor exhibited high X-ray absorption, excellent particle monodispersion, high OSL output, and high DQE.

Conclusions:

• Liquid phase synthesis is an effective method for producing BaFI:Eu phosphors with desirable properties for CR imaging.
• The developed BaFI:Eu phosphor shows significant promise for enhancing image quality and diagnostic accuracy in computed radiography.