Simulation of the Background for Gamma Detection System in the Indoor Environments of Concrete Buildings
Simulation of the Background for Gamma Detection System in the Indoor Environments of Concrete Buildings
复制标题
混凝土建筑室内环境伽马检测系统背景模拟
DOI：
10.1080/18811248.2001.9715143
复制
发表时间：
2001
影响因子：
1.2
通讯作者：
Makoto Yoshida
中科院分区：
文献类型：
--
作者：
M. Tsutsumi;T. Oishi;N. Kinouchi;R. Sakamoto;Makoto Yoshida
室内背景对确定伽马探测系统的最低可检测电平具有重要意义。用蒙特卡罗模拟方法研究了混凝土建筑物内的伽马辐射场。在建模中考虑了壁厚、房间形状和尺寸等参数。为了便于计算，室内声源的几何形状采用球层模型。将该仿真模型应用于非屏蔽锗探测器和具有更复杂屏蔽结构的探测系统。结果表明，假定真实厚度的球形混凝土层源几何形状，以238U系列、232Th系列和40K天然三组分均匀分布的辐射源，可以较好地预测混凝土建筑内的室内辐射场。该仿真模型对于设计和优化伽马探测系统或屏蔽组件是有用的。
The indoor background has significance in determining the minimum detectable level of gamma detection systems. The gamma radiation field in a concrete building was studied by using the Monte Carlo simulations. The parameters of wall thickness, room shape and dimensions were considered in the modeling. A spherical layer model was assumed as the indoor source geometry with the intention of easy and effective calculations. The simulation model was applied to an unshielded germanium detector and the detection system with a more complex shielding configuration. As the results, the indoor radiation field in the concrete building can be predicted well by assuming the source geometry of a spherical concrete layer with a real thickness and the homogeneously distributed source of the natural major three components, the 238U series, 232Th series and 40K. The simulation model is useful for designing and optimizing gamma detection systems or shielding assemblies.