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用多箔法测定热中子堆内活性区和反射层内的全能区中子通量谱。选择26种探测器,把10~(-4)eV至20MeV的整个能区分为640群,考虑箔自身吸收和散射,按群内中子是单能的计算14种热与中能探测器的自屏因子。按各箔截面互相一致适用原则选择活化反应截面。文中给出计算得的通量谱和谱误差。还给出两测点的“宏观谱量”,包括热中子通量,中子温度,费米谱量,偏离费米谱指数和快中子积分通量。检验了反应率、截面和初始通量谱对解谱的灵敏度。在初始谱变化较大的情况下都获得大体一致的结果。在能量<0.01eV与约10～500keV的两个能区,探测器响应均不灵敏,亦获得合理的通量谱分布。
Determination of neutron flux in the all-energy region of the active and reflective layers in the thermal neutron reactor by the multi-foil method. Select 26 kinds of detectors, the whole can be 10 ~ (-4) eV to 20MeV can be divided into 640 groups, taking into account the foil itself absorption and scattering, according to neutrons is a single group can calculate 14 kinds of thermal and detector Self-screen factor. According to the foil cross-section consistent with each other principles applicable to select the activation cross-section. The calculated flux and spectral errors are given. The “macroscopic quantities” of two measuring points are also given, including the thermal neutron flux, the neutron temperature, the Fermi spectrum, the deviation Fermi spectrum index and the fast neutron fluence. The sensitivity of the reaction rate, cross section and initial flux spectrum to the spectrum resolution was examined. A broadly consistent result was obtained with large initial spectral changes. In the two energy regions of energy <0.01eV and about 10 ~ 500keV, the detector response is not sensitive, and a reasonable flux spectrum distribution is obtained.