Fabrication and characterization of cubic SrI2(Eu) scintillators for use in array detectors
Fabrication and characterization of cubic SrI2(Eu) scintillators for use in array detectors
复制标题
用于阵列探测器的立方 SrI2(Eu) 闪烁体的制造和表征
DOI：
10.1016/j.nima.2015.11.140
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Y. Yamasaki
中科院分区：
文献类型：
--
作者：
K. Shimazoe;A. Koyama;H. Takahashi;S. Sakuragi;Y. Yamasaki
碘化锶(SrI2(Eu))具有良好的能量分辨率和较低的内本底辐射，是一种在核安全和医学成像领域都有应用前景的光谱探测器。当与硅基光电传感器耦合以构建用于诸如康普顿相机的应用的阵列探测器时，立方体形式是优选的。在此基础上，制备了侧面尺寸为10 mm的立方SrI2(Eu)晶体，并对其进行了性能评价。与雪崩光电二极管耦合的立方体SrI_2(Eu)样品在662keV的整形时间为3微米S时的能量分辨率约为3.6%。在较低的温度下也观察到了光输出的增加和能量分辨率的提高。这些器件良好的能量分辨率表明，这些晶体在康普顿相机和其他成像探测器中具有潜在的应用前景。
Strontium iodide (SrI2(Eu)) is a promising spectroscopic detector for use in both nuclear security and medical imaging owing to its excellent energy resolution and low internal background radiation. A cubic form is preferable when coupling with a silicon-based photosensor in order to build an array detector for use in applications such as Compton cameras. Here, cubic SrI2(Eu) crystals with 10 mm sides were fabricated and evaluated. The cubic SrI2(Eu) samples coupled to an avalanche photodiode exhibited an energy resolution of approximately 3.6% at 662 keV when using a shaping time of 3 µs. An increase in light output and an improvement of energy resolution were also observed at lower temperatures. The excellent energy resolution of these devices indicates that these crystals are promising potential detectors for use in Compton cameras and other imaging detectors.