【摘要】 针对单球中子谱仪能量响应受几何辐照条件影响的问题,探讨了在聚乙烯慢化球外层掺入一定厚度一定含量的含硼聚乙烯代替纯聚乙烯慢化球的设计,利用MCNPX模拟计算了单球中子谱仪在不同几何辐照条件下受到不同中子源辐照时的能量响应,同时引入了皮尔逊相关系数定量分析了不同几何辐照条件下的能量响应相关性,结果发现设计提高了单球中子谱仪能量响应的各向同性。更多还原

【Abstract】 A new design was proposed and discussed by introducing certain thickness polyethylene containing boron with certain density instead of using pure high density polyethylene in order to deal with the problem on energy response dependent on geometric irradiation condition of current single-sphere neutron spectrometer.The energy responses of the single-sphere neutron spectrometer irradiated by different neutron sources and geometric irradiation conditions have been calculated with the use of MCNPX,and Pearson correlation coefficients have been introduced to quantitatively analysis the relationship of energy response curves under different geometric irradiations.The result showed that the new design has improved the isotropy of energy response of the single sphere neutron spectrometer.更多还原