现代应用物理2024，Vol.15Issue(2)：77-86,131,11.DOI:10.12061/j.issn.2095-6223.2024.020208
中子诱发238U裂变产额的统一评价
Unified Evaluation of Neutron Induced 238U Fission Yield
摘要
Abstract
Fission yield data is important for nuclear reactor design and operation,nuclear device design and testing,military control verification,spent fuel reprocessing,and nuclear waste management.It is also the basic data for fission physics research.This paper adopts a unified evaluation method for neutron induced 238U fission yield based on the ZP model.The optimized model parameters are obtained by fitting experimental data.Based on the obtained model parameters,the independent and cumulative yields of neutron induced 238U fission with incident energies of fission spectrum(F)and 14 MeV(H)are calculated,and an ENDF/B-Ⅵ format database is established.The results are consistent since this evaluation method includes the physical mechanism of the relation among the independent yield,cumulative yield and decay data,avoid the problem of yield inconsistency in traditional method.At the same time,it could produce yield where the measurement data are lack or missing.The conformance between cumulative production of this paper and the experimental data with x2=7.1(F)and 2.9(H),which is a significant improvement compared to the x2=8.0(F)and 57.3(H)of ENDF/B-Ⅶ.0,and the x2=57.0(F)and 74.2(H)of JEFF-3.3.关键词
裂变产额/裂变产额评价/ZP模型/n+238UKey words
fission yield/evaluation of fission yield/ZP model/n+238U分类
数理科学引用本文复制引用
李畅,刘玲,舒能川,曹超维,宿阳,陈永静,肖越,刘萍..中子诱发238U裂变产额的统一评价[J].现代应用物理,2024,15(2):77-86,131,11.基金项目
国家自然科学基金资助项目(11790323,U1867213,12075183,11790320,11790324,11790325) （11790323,U1867213,12075183,11790320,11790324,11790325）
