以钴自给能探测器为例，详细阐述了瞬发型自给能中子探测器（SPND）与核反应堆内中子作用的物理特征、信号电流产生机理等关键过程，并借助于蒙特卡罗程序多粒子耦合输运功能对公开文献中的钴SPND初始灵敏度进行了理论分析计算。最后，将蒙特卡罗方法与确定论方法以及金箔活化法得到的实验测量值进行对比分析。结果表明，基于蒙特卡罗方法的理论计算值和实验值相比最大偏差皆小于5%，证明了该方法相较于确定论计算方法不仅更加简单有效，而且精度更高。
In this paper, the prototype with Cobalt-59 emitter as a representative of instantaneous SPND was developed and modeled to calculate its initial sensitivity. This calculation model is based on Monte Carlo method of multi-particle coupling transportation. And some important details, such as the physical characteristics of cobalt SPND, the generation of signal current, were discussed thoroughly. The research results from this model are compared with experimental results by using gold foilactivation methods and show a very good agreement. The maximum relative error is not greater than 5%. It demonstrated that this method can be successfully applied in SPND calculation and better than determinism method.
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