层析γ扫描探测效率的无源刻度  

Detection efficiency of tomography gamma scanning through sourceless calibration

作　　者：贾小龙[1] 张全虎[1] 黎素芬[1] 刘杰[1] 左广霞[1] 隋洪志[2] 邱晓林[1] 

机构地区：[1]第二炮兵工程学院102室,西安710025 [2]中国原子能科学研究院,北京102413

出　　处：《核技术》2012年第8期615-618,共4页Nuclear Techniques

摘　　要：层析γ扫描是准确定量测量中、高密度非均匀分布介质中的放射性素及其含量的重要方法,其中探测效率的确定是其关键技术之一。本文结合实验室层析γ扫描测量装置,采用蒙特卡洛方法,运用空间对称性简化计算模型,提出层析γ扫描探测效率无源刻度方法。计算机模拟和实验结果都表明了该方法的正确性和有效性。Tomography gamma scanning （TGS） technology is an important method for accurate determination of transuranic nuclides in medium- and high-density heterogeneously distributed media, hence the importance of determining the detection efficiency of a TGS. This can be done by a sourceless calibration based on Monte Carlo method. In this paper, a simulation model is established with a 6×6×6 sample division and the GR3091 HPGE system, and the relationship of spatial symmetry is used to save computer hours. Comparisons between the calculation and the measurement results prove that the computer simulation is a good method.

关 键 词：层析γ扫描 探测效率 无源刻度 空间对称性 

分 类 号：O572[理学—粒子物理与原子核物理]