涂硼稻草管中子探测器等效MC模型研究

Study on the Equivalent MC Model of Boron-Coated Straw Neutron Detector

建立了一种涂硼稻草管中子探测器等效MC模型的方法。使用典型的^(3)He或BF_(3)探测器模型来等效涂硼稻草管中子探测器,通过Am-Li源的探测效率实验,确定等效的^(3)He或BF_(3)探测器模型参数。将此等效模型应用于钚溶液实验,使用等效^(3)He模型计算的探测计数率与实测计数率相差较小,验证涂硼稻草管中子探测器等效MC模型的可行性和准确性。实验表明:本等效MC模型方法可推广应用到其他难以建立有效MC计算模型的探测器。

The method of establishing equivalent MC model of boron-coated straw neutron detector is studied.The^(3)He or BF_(3)detector MC model is used to substitute the boron-coated straw neutron detector model.A detection efficiency experiment using Am-Li source is carried out to derive the equivalent parameters of the^(3)He or BF_(3)detector model.An experiment using plutonium solution is carried out to valid the equivalent model.The difference of the counting per second between equivalent^(3)He detector MC calculation and boron-coated straw detector measurement is small,which proves that the equivalent MC model is feasible and correct.The experiment result shows that the method studied in this paper can be used to other detectors which is hard to establish MC model.