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简介了利用SAND-II解中子谱的基本原理;分析了影响谱不确定度的因素,详细描述了利用蒙特卡罗方法分析谱不确定度的一般步骤:包括随机样本的选取、样本标准偏差的确定、谱的方差、标准偏差(标准不确定度)计算等。通过对脉冲反应堆辐照腔中子能谱的测量计算,总结了提高SAND-II解谱准确性的主要途径。
The basic principle of using SAND-II to solve neutron spectrum is introduced. The factors that affect the uncertainty of spectrum are analyzed. The general steps of using the Monte Carlo method to analyze the spectral uncertainty are described in detail: including the selection of random samples, the standard deviation of samples The determination of spectral variance, standard deviation (standard uncertainty) calculation and so on. By measuring and calculating the neutron energy spectrum of the impulse cavity of pulse reactor, the main ways to improve the accuracy of SAND-II spectroscopy are summarized.