论文标题
2D像素化的Stilbene闪烁体检测器阵列，用于同时进行快速中子和伽玛的射线照相
A 2D pixelated stilbene scintillator detector array for simultaneous radiography with fast neutrons and gammas
论文作者
论文摘要
对于使用伽玛同时使用快速中子的放射线照相应用，我们开发了一个具有16个Stilbene晶体的检测器，其4 $ \ times $ 4 2D阵列具有5〜mm的螺距和25毫米的深度。硅阵列由硅光电层流和自定义信号处理电子读取。检测器原型使用Paul Scherrer Institute的自定义D-D快速中子发电机进行了测试。通过应用脉冲形状辨别算法，检测器能够同时检测和区分快速中子和伽马仪。测试了用不同的材料和厚度放置在源和检测器之间的各种衰减样品，并将测得的宏观快速中子横截面与预期的宏观快速中子横截面进行了比较。借助详细的GEANT4模拟研究了偏差。 D-D快速中子的检测效率约为10 \％。
For radiography applications using fast neutrons simultaneously with gammas we have developed a detector with 16 stilbene crystals in a 4$\times$4 2D array with a 5~mm pitch and a depth of 25~mm. The crystal array is read out by Silicon photomultipliers and custom signal processing electronics. The detector prototype was tested using a custom D-D fast neutron generator at the Paul Scherrer Institute. By applying a pulse shape discrimination algorithm the detector is able to detect and distinguish fast neutrons and gammas simultaneously. Various attenuating samples placed between the source and detector with different materials and thicknesses were tested and the measured macroscopic fast neutron cross sections were compared to what was expected. Deviations were studied with the help of detailed Geant4 simulations. The detection efficiency for D-D fast neutrons was measured to be around 10\%.
