Abstract This paper investigates the application of the modified unscented transformation (MUT) method for uncertainty propagation in neutron induced cross section measurement in Nuclear Science. The method is the improvement on unscented transformation (UT) technique by incorporating more parameters (not random) to increase the number of sigma points. We examined the application of MUT method for covariance analysis of cross section measurement in comparison to the first order sensitivity analysis method and Monte Carlo methods. The MUT method is simple to use and easier to implement in comparison to the sandwich formula. The Monte Carlo simulations had been carried out to illustrate the good performance of the MUT method in covariance analysis in neutron activation cross section measurement.

中文翻译：

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中子诱导截面测量中不确定度传播的改进无迹变换方法

摘要 本文研究了改进的无迹变换 (MUT) 方法在不确定性传播中在核科学中子诱导截面测量中的应用。该方法是对无迹变换 (UT) 技术的改进，通过合并更多参数（非随机）来增加 sigma 点的数量。与一阶灵敏度分析方法和蒙特卡罗方法相比，我们研究了 MUT 方法在横截面测量协方差分析中的应用。与三明治公式相比，MUT 方法使用简单且更易于实施。进行了蒙特卡罗模拟以说明 MUT 方法在中子活化截面测量协方差分析中的良好性能。