Characterization of a Cs 2LiYCl6 :Ce3+ scintillator coupled with two silicon photomultiplier arrays of different Sizes
Characterization of a Cs 2LiYCl6 :Ce3+ scintillator coupled with two silicon photomultiplier arrays of different Sizes
复制标题
与两个不同尺寸的硅光电倍增管阵列耦合的 Cs2LiYCl6: Ce3 闪烁体的表征
DOI：
10.1016/j.nima.2019.162339
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yigang Yang
中科院分区：
文献类型：
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作者：
Qibiao Wang;Xianguo Tuo;Chao Deng;Lixing Liu;Yi Cheng;Chunsheng Zhang;Yigang Yang
宇宙射线产生的中子是太空探索期间对宇航员和航天器造成辐射危害的主要因素。提出了一种硅光电倍增管（SiPM-）阵列耦合Cs 2 LiYCl 6: Ce 3+（CLYC）探测器来测量航天器上的中子。由于光收集效率和热噪声率都与 SiPM 的尺寸成正比，因此有必要比较 CLYC 与不同尺寸的 SiPM 阵列结合时的特性。本文将由3×3-mm 2 SiPM元件组成的4×4阵列和8×8阵列耦合到Φ38mm×38mm圆柱形CLYC探测器。使用两个伽马射线源和一个中子源测试了能量分辨率、脉冲形状辨别（PSD）性能和温度依赖性。结果表明，能量分辨率和 PSD 性能主要受益于大阵列更高的光收集效率。 137 Cs的峰值质心在-35°C到+55°C的测试温度范围内变化约20%。
Neutrons produced by cosmic rays comprise the main factor in radiation hazards for astronauts and spacecraft during space exploration. A silicon-photomultiplier-(SiPM-) array-coupled Cs 2 LiYCl 6: Ce 3+(CLYC) detector was proposed to measure neutrons onboard spacecraft. Since both light-collection efficiency and thermal noise rate are proportional to a SiPM’s size, it is necessary to compare CLYC’s characterization when coupled with SiPM arrays of different sizes. In this paper, a 4× 4 array and an 8× 8 array, both of which are composed of 3× 3-mm 2 SiPM elements, were coupled to a Φ 38 mm× 38 mm cylindrical CLYC detector. The energy resolution, pulse-shape-discrimination (PSD) performance, and temperature dependence were tested with two gamma-ray sources and a neutron source. Results indicate that both energy resolution and PSD performance mainly benefit from the higher light-collection efficiency of the large array. The peak centroids of 137 Cs varied by∼ 20% in the testing temperature region from-35° C to+ 55° C.