Experimental study on the effect of neutron shielding material on radioisotope backscattering detector
Experimental study on the effect of neutron shielding material on radioisotope backscattering detector
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中子屏蔽材料对放射性同位素背散射探测器影响的实验研究
DOI：
10.11532/structcivil.68a.825
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
池永 太一
中科院分区：
文献类型：
--
作者：
神頭 峰磯;瀬古 繁喜;池永 太一
为了发现混凝土中的空隙，当我们使用放射性同位素背散射探测器时，热中子测量结果包括了我们以前研究中探测器侧面的影响。这是由于快中子从源向各个方向散射造成的。为了解决这个问题，进行了两种类型的实验。首先，研究了不同调节者的特征，以选择适用的材料。在第二个实验中，当减速器连接到空隙检测系统时，实验检查了模拟样品上的放射性同位素计数的移动。实验结果表明，在该装置上附加慢化剂可提高空洞探测能力。
To find voids in concrete, when we used a radioisotope backscatter detector, the thermal neutron measurement results included the effect from the sides of the detector in our prior studies. This is caused by scattered fast neutron in all directions from the source. To solve this problem, two types of experiments were conducted. In the first, the characteristics of different moderators were investigated to choose the applicable material. In the second, when the moderator was attached to the void detecting system, movement of radio-isotope count on mock specimen were examined experimentally. The experiments in this paper revealed that attached moderator to this device improves the void detection capability.