| 摘要 |
Oxyhalides of lanthanum and/or gadolinium coactivated with thulium and terbium are phosphors found to have the advantages of reduced afterglow and increased ultraviolet emisson. The relative speed of the phosphors is also quite high. These phosphors are used in x-ray image converters generally, and can be used in such devices as x-ray image intensifier tubes, in fluoroscopic screens and in radiographic intensifier screens.
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