Abstract
Lanthanide-doped oxide photo-stimulable (PS) phosphors (C12A7:Tb3+) with different encaged anions (O2−, H−, OH− and e−) have been prepared by a combustion method in combination with treatment under different conditions. Electron spin resonance (ESR) and Fourier transform IR (FTIR) transmittance data confirm the existences of encaged electrons, O2− (indicating the existence of encaged O2- anions) and OH− anions in C12A7:Tb3+. PS luminescence, thermoluminescence (TL), X-ray storage properties and luminescent kinetics analysis show that the more encaged OH− anions appear in C12A7, the shallower the depths of the two deeper traps (Etrap1 = ∼0.72 eV and Etrap2 = ∼0.95 eV), the smaller the glow-peak intensity ratio (Itrap2/Itrap1), the shorter the X-ray storage time and the lower the quality of X-ray imaging become. Our results suggest that, among all the anions, encaged OH− anions in C12A7:Tb3+ play a key role in influencing X-ray storage properties of PS phosphors. High-quality X-ray image with a resolution of ∼15 line pairs per mm (lp/mm) has been obtained by reducing encaged OH− anions in PS phosphors. The C12A7:Tb3+ PS phosphor is a potential candidate material for computed radiography system and erasable/rewritable optical memory media.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
