Fast Scintillation X-Ray Detector Using Proportional-Mode Si-APD and a HfO2-Nanoparticle-Doped Plastic Scintillator
Fast Scintillation X-Ray Detector Using Proportional-Mode Si-APD and a HfO2-Nanoparticle-Doped Plastic Scintillator
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使用比例模式 Si-APD 和 HfO2 纳米粒子掺杂塑料闪烁体的快速闪烁 X 射线探测器
DOI：
10.1109/tns.2018.2807801
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
and S. Kishimoto
中科院分区：
文献类型：
--
作者：
K. Inoue;M. Koshimizu;F. Hiyama;K. Asai;F. Nishikido;R. Haruki;and S. Kishimoto
我们研制了一种新型的基于比例模硅雪崩光电二极管的快速闪烁探测器，用于高能同步辐射30keV的核正向散射实验。在对一个原型探测器进行了测试后，我们用4个3×3×3 mm~3EJ-256闪烁体和3×3 mm~2象素的Si雪崩光电二极管阵列制作了一个四通道探测器，探测器的光电探测器采用了载铅塑料闪烁体(EJ-256，Eljen Technology)和比例模硅雪崩光电二极管(S8664-3796(X)，滨松光电公司)。该探测器在EJ-256上有12毫米的光束路径。此外，对直径为3 mm、厚度为1 mm的10wt%HfO2纳米颗粒掺杂塑料闪烁体(HF-PLS)进行了检测。Hf是一个原子序数为72的重原子，K吸收边的能量为65.351 keV。其直径为-4 nm的氧化物纳米颗粒被结合到聚合物基质中。在-34℃下测量了该探测器的脉冲高度分布和时间谱，对57.6keV X射线的时程增益为-0.200。HF-PLS的光产额是相同尺寸的EJ-256的1.2倍，并且获得了0.34 ns(半高全宽)的良好时间分辨率，优于EJ-256的0.54 ns。这是由于闪烁溶液的不同，因为在HF-PLS中只加入了2-(4-tert-butylphenyl)-5-(4-phenylphenyl)-1，3，4-恶二唑，而在EJ-256中，包括了2，5-二苯基恶唑和1，4-二(5-苯基-2-恶唑基)苯等二元溶液。
We developed a new fast scintillation detector using proportional-mode silicon avalanche photodiode (Si-APD) for nuclear forward scattering experiments using high-energy synchrotron X-rays >30 keV. After a test of a prototype detector with a lead-loaded plastic scintillator (EJ-256, Eljen Technology) and proportional-mode Si-APD (S8664-3796(X), Hamamatsu Photonics) as a photodetector, we fabricated a four-channel detector using four 3×3×3 mm3EJ-256 scintillators and Si-APD arrays of 3 × 3 mm2pixels to increase the detection efficiency. The detector had a 12-mm beam path in the EJ-256. Moreover, a 10wt% HfO2-nanoparticle-doped plastic scintillator (Hf-PLS), 3 mm in diameter and 1 mm in thickness, was examined using the prototype detector. Hafnium is a heavy atom of atomic number 72 and the energy of the K-absorption edge is 65.351 keV. Its oxide nanoparticles, -.4 nm in diameter, were incorporated into a polymer matrix. The pulse-height distribution and time spectra for the detector with the Hf-PLS were measured at -34 °C with an APD gain of -.200 for 57.6-keV X-rays. The light yield of the Hf-PLS was 1.2 times that of the EJ-256 of the same size, and a good time resolution of 0.34 ns (full width of half maximum) was obtained better than that of 0.54 ns for the EJ-256. This was due to the difference in the scintillation solution, as only 2-(4-tert-butylphenyl)-5-(4-phenylphenyl)-1,3, 4-oxadiazole was added in the Hf-PLS, however, for in the EJ-256, the binary solutions, such as 2,5-diphenyloxazole and 1,4-bis (5-phenyl-2-oxazolyl)benzene, were included.
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