The Experimental Study of Lanthanum Bromide Detector in the Gamma Ray Imaging
The Experimental Study of Lanthanum Bromide Detector in the Gamma Ray Imaging
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DOI：
10.4028/www.scientific.net/amm.336-338.373
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
Cuilan Zhao;Y. Li;Li Chen;C. Yuan;Y. Qi
中科院分区：
文献类型：
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作者：
Cuilan Zhao;Y. Li;Li Chen;C. Yuan;Y. Qi
铈激活的溴化镧（LaBr 3：Ce 3+）闪烁体晶体已经显示出非常有前途的特性，用于高分辨率和高灵敏度伽马射线成像和光谱应用[1，2，.本文介绍了一种基于LaBr_3：Ce ~（3+）晶体的小型γ照相机的一些初步结果。探测器模块由一个连续的LaBr 3：Ce 3+晶体组成，其灵敏面积为50 × 50 mm 2，厚度为5 mm，耦合到Hamamatsu H8500位置敏感光电倍增管（PSPMT）。提出了一种基于对称电荷分配电路（SCD）的紧凑型多路复用读出电路，将64个阳极信号减少到16个读出通道，并采用电阻分配网络将读出通道从16个减少到4个。使用57 Co源测试成像探测器模块的性能。初步结果表明，该探测器模块可以实现约39 × 39 mm 2的有效视场（FOV），在122 keV下具有约1.5 mm的良好的固有空间分辨率和9.2%的能量分辨率。
Cerium activated lanthanum bromide (LaBr3:Ce3+) scintillator crystal has shown very promising characteristics for high-resolution and high-sensitivity gamma ray imaging and spectrometric applications [1,2,. In this paper, we present some preliminary results of a compact gamma camera based on LaBr3:Ce3+ crystal. The detector module consists of a continuous LaBr3:Ce3+ crystal with a sensitive area of 50x50 mm2 and 5mm thickness coupling to a Hamamatsu H8500 position-sensitive photomultiplier tube (PSPMT). A compact multiplexed readout based on symmetric charge division circuit (SCD) was developed to reduce the 64 anode signal to 16 readout channels, and a resistive division network to reduce the readout channels from 16 to 4. The performance of the imaging detector module was tested using a 57Co source. The preliminary results showed that this detector module can achieve an effective field-of-view (FOV) of ~39x39 mm2 with a good intrinsic spatial resolution around 1.5mm and energy resolution of 9.2% at 122 keV.