在反应堆物理设计和分析时，经常要进行微扰计算，以快速分析堆芯中子截面扰动下反应性的变化量。
Perturbation calculation will be required to rapidly determine the changes of reactivity caused by core neutron cross sections perturbation in reactor physics design and analysis.
这个图表给你们一个重要的,可裂变和可转换核素的,一些临界热能中子横截面的总结。
This chart gives you a summary of some of the critical thermal-neutron cross sections of important fissile and fertile nuclides.
但是，所有这个材料，这些横截面被测量的，是以能量的函数，它们是测量，中子能量的函数，那也是特定的媒介的，温度的函数。
But all this stuff, these cross sections are measured as a function of energy, they're measure as a function of the neutron energy which is a function of the temperature of the particular medium.
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