时间关联符合法铀部件质量测量中的几何影响

Influence of Uranium Components Geometry on Time Correlation Coincidence Mass Measurement

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China

摘要: 外中子源注入铀部件后，根据两路探测器间的中子和gamma粒子时间关联符合计数分布可获得铀部件的质量等特性。本文利用粒子蒙特卡罗输运程序，对富集度相同、几何尺寸各异的4块半球壳形状的金属铀部件质量测量实验进行模拟，获得对应粒子的时间关联符合计数分布。然后，根据模拟计算结果，评估几何形状对质量分辨的影响。研究结果表明，4块半球壳金属铀部件的形状对其质量测量的影响不大。
- 时间关联符合法 ,
- 铀部件质量测量 ,
- 铀部件几何
Abstract: Source-driven time correlation coincidence measurements can provide time dependent coincidence distribution between two detectors that can be related to the mass of uranium components. The measurement process on four half shell uranium components with different masses but the same enrichment were simulated by Monte Carlo code. And the corresponding time dependent coincidence distribution of particles was obtained. The research shows that the influence of geometry from four uranium components is so small that it hardly affects the results of uranium components mass identification.
- time correlation coincidence measurement ,
- mass measurement about uranium components ,
- uranium components geometry

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