哈尔滨工程大学学报2024，Vol.45Issue(12)：2298-2303,6.DOI:10.11990/jheu.202411012
衰变分支比抽样方法研究及分析
Research and analysis of sampling methods for decay branch ratio
王珺 1郝琛 1王毅箴 1尹文 1徐宁1
作者信息
- 1. 哈尔滨工程大学 核科学与技术学院,黑龙江 哈尔滨 150001
- 折叠
摘要
Abstract
The branching ratio is constrained by a"sum-to-one"condition,causing difficulty in generating per-turbed samples while preserving their statistical properties in a library of evaluated nuclear data.This study exam-ines the existing branch ratio sampling method based on the generalized Dirichlet distribution.Nuclides with three decay branches from the ENDF/B-Ⅷ.0 evaluated nuclear data library were selected for sampling.Moreover,for four nuclides,the established statistics(mean and standard deviation)in the evaluated nuclear data library could not be accurately satisfied.Building on the previous studies,the branching ratios of ENDF/B-Ⅷ.0 and JENDL-5 nuclides with three decay branches were compared.Results reveal notable differences between the branch ratio data provided by the two databases.The existing sampling methods were proven to meet the statistical requirements in JENDL-5 and successfully generate perturbed samples.Meanwhile,due to the"neutrality"of Dirichlet distribu-tion,the sampling method has a certain dependence on the sampling order.The input parameters must be arranged in ascending order during sampling.关键词
衰变分支比/广义Dirichlet分布/抽样方法/评价核数据库/完全中立性/均值/标准差/扰动样本Key words
decay branch ratio/generalized Dirichlet distribution/sampling method/evaluated nuclear data library/complete neutrality/mean/standard deviation/perturbed sample分类
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王珺,郝琛,王毅箴,尹文,徐宁..衰变分支比抽样方法研究及分析[J].哈尔滨工程大学学报,2024,45(12):2298-2303,6.
