Photostimulated luminescence of BaFBr:Eu2+ phosphors

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Abstract
After x‐irradiation for 10 s, luminescence from BaFBr:Eu2+ phosphors by photostimulation of longer wavelength than F absorption bands was observed and assigned to the surface states or intrinsic defects of the powders. It is found that the luminescence by photostimulation into F bands can be reduced via electron migration from F centers into the surface states or intrinsic defects, thus reducing the x‐ray storage or image stability. Surface passivation can lower these defects and improve the phosphors or imaging plate quality.