Improvement in scintillation performance of Ce, Er codoped yttrium aluminum garnet crystals by means of a postgrowth treatment
Improvement in scintillation performance of Ce, Er codoped yttrium aluminum garnet crystals by means of a postgrowth treatment
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DOI：
10.1063/1.2981086
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发表时间：
2008-09
影响因子：
4
通讯作者：
D. Solodovnikov;M. Weber;K. Lynn
中科院分区：
文献类型：
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作者：
D. Solodovnikov;M. Weber;K. Lynn
将Ce、Er共掺杂的钇铝石榴石样品在环境空气或氧气流下进行退火，然后溅射涂覆Al并在Ar中退火。经过这种处理后，Al在体中扩散并填充阳离子空位，但这一过程只有在氧空位耦合到阳离子空位被氧原子填充后才有可能发生。对于10×10×6mm尺寸的晶体，闪烁体性能从662keV时的13.2%全宽提高到3.4%。这些发现为石榴石晶体缺陷的处理提供了一种新颖有效的方法。
Samples of Ce, Er codoped yttrium aluminum garnet were annealed in ambient air or under oxygen flow and then sputter coated with Al and annealed in Ar. After this treatment Al diffused in the bulk and filled cation vacancy but this process is possible only after oxygen vacancy coupled to the cation vacancy is filled by an oxygen atom. The scintillator performance was improved from 13.2% full width at half maximum at 662keV to 3.4% for a 10×10×6mm size crystal. These findings provide an effective original approach to defect treatment in garnet crystals.