首页> 外文会议>Symposium on Luminescent Materials, held April 5-8, 1999, San Francisco, California, U.S.A. >Optimization of mixed storage phosphors of the type (Ba,Sr)F_(1+x)Br_(1-x):Eu for digital X-ray radiography
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Optimization of mixed storage phosphors of the type (Ba,Sr)F_(1+x)Br_(1-x):Eu for digital X-ray radiography

机译:用于数字X射线照相的(Ba,Sr)F_(1 + x)Br_(1-x):Eu型混合存储磷光体的优化

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摘要

The possibility of further improving the sensitivity of the widely used BaFBr:Eu X-ray storage phosphor is investigated. The influence of CsF- and EuF_3-doping on the stimulation spectrum is identical to the one of other ways to vary F/Br-ratio of this mixed crystal. The effect of CsF-doping turns out to be not primarily due to a replacement of Ba~(2+) by Cs~(1+) and subsequent charge compensation, but rather to the change in the F/Br ratio. Sr doping not only gives rise to F_A(Br~-, Sr~(2+))-center formation but, at the same time increases the PSL-response in the bands ascribed to F(Br~-)-centers.
机译:研究了进一步提高广泛使用的BaFBr:Eu X射线存储荧光粉灵敏度的可能性。 CsF-和EuF_3掺杂对激发光谱的影响与其他改变该混合晶体的F / Br比的方法之一相同。事实证明,CsF掺杂的影响主要不是由于用Cs〜(1+)代替Ba〜(2+)和随后的电荷补偿,而是由于F / Br比的变化。 Sr掺杂不仅会形成F_A(Br〜-,Sr〜(2+))中心,而且会同时增加归因于F(Br〜-)中心的谱带中的PSL响应。

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