Scintillation properties of CsI:Tl crystals codoped with Sm2+
Scintillation properties of CsI:Tl crystals codoped with Sm2+
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DOI：
10.1109/tns.2008.915689
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发表时间：
2008-06-01
影响因子：
1.8
通讯作者：
Bartram, R. H.
中科院分区：
文献类型：
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作者：
Nagarkar, V. V.;Brecher, C.;Bartram, R. H.
尽管CsI：Tl在大多数闪烁体应用中具有公认的优势，但它在CT和其他高速成像中的使用因其闪烁衰减过程中的高度余辉而受到阻碍。我们发现，抑制这种余辉的一种特别有效的方法是将某些双阳离子稀土离子包裹在材料上，这些离子能够捕获产生这种余辉的漂移的载体。我们已经广泛地研究了其中一个离子Eu2+改变闪烁光谱和动力学性质的方式，并建立了与实验结果一致的一致的数学模型。但Eu2+的有益影响似乎仅限于相对较短的时间(例如
Despite the acknowledged advantages of CsI:Tl for most scintillator applications,its use for CT and other high-speed imaging has been hindered by a high degree of afterglow in its scintillation decay. We have found that a particularly effective way to suppress this afterglow is to codope the material with certain dipositive rare earth ions capable of trapping the vagrant carriers that give rise to it. We have extensively studied the manner in which one such ion, Eu2+, alters the spectroscopic and kinetic properties of the scintillation, and have developed a coherent mathematical model consistent with the experimental results.But the beneficial effect of Eu2+ appears to be restricted only to relatively short times (say