Luminescent properties of Cr-doped (Gd X , Y 1 - X ) 3 Al 5 O 12 infra-red scintillator crystals
Luminescent properties of Cr-doped (Gd X , Y 1 - X ) 3 Al 5 O 12 infra-red scintillator crystals
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DOI：
10.1016/j.optmat.2014.04.002
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发表时间：
2014-10
影响因子：
3.9
通讯作者：
Akira Suzuki;S. Kurosawa;A. Yamaji;Y. Shoji;J. Pejchal;K. Kamada;Y. Yokota;A. Yoshikawa
中科院分区：
文献类型：
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作者：
Akira Suzuki;S. Kurosawa;A. Yamaji;Y. Shoji;J. Pejchal;K. Kamada;Y. Yokota;A. Yoshikawa
研究了通过微下拉法制备的 Cr 掺杂 (GdXY1−X)3Al5O12(X= 0, 0.25, 0.50) 晶体，以开发用于放射治疗中植入式患者剂量计的红外闪烁体。为了评估它们的光学和闪烁性能，测量了以下特性：（i）紫外线和近红外区域之间的透射率，（ii）氙灯激发下的光致发光光谱，以及（iii）X射线激发的放射发光光谱。 Cr:Y3Al5O12和Cr:(Gd0.25Y0.75)3Al5O12晶体的透光率提高了80%，而Cr:(Gd0.50Y0.50)3Al5O12由于其多晶结构而具有较低的40%的透光率。此外，所有 Cr:(GdXY1−X)3Al5O12 晶体均表现出尖锐的闪烁发光峰，归因于 Cr3+d-d 跃迁。因此，这些结果表明Cr:Y3Al5O12和Cr:(Gd0.25Y0.75)3Al5O12晶体可以作为剂量计使用的候选材料。
Cr-doped (GdXY1−X)3Al5O12(X= 0, 0.25, 0.50) crystals prepared by the micro-pulling down method were investigated to develop a infra-red scintillator for implantable patient dosimeter in radiation therapy. In order to evaluate their optical and scintillation performance, the following properties were measured: (i) transmittance between ultra-violet and near-infra red region, (ii) photoluminescence spectra under Xe-lamp excitation, and (iii) X-ray excited radio-luminescence spectra. Cr:Y3Al5O12and Cr:(Gd0.25Y0.75)3Al5O12crystals showed increased transmittance of 80%, while Cr:(Gd0.50Y0.50)3Al5O12had a lower transmittance of 40% due to its polycrystalline structure. In addition, all the Cr:(GdXY1−X)3Al5O12crystals showed sharp scintillation luminescence peaks ascribed to Cr3+d–d transitions. Therefore, these results suggested that Cr:Y3Al5O12and Cr:(Gd0.25Y0.75)3Al5O12crystals can be candidate materials for the dosimeter use.