物理学报Issue(16)：1-8,8.DOI:10.7498/aps.63.162801
一维贫铀/聚乙烯交替系统中D-T中子诱发的232Th（n,γ）反应率的测定与分析
Determination of 232Th(n, γ) reaction rate induced by D-T neutrons in one-dimensional alternate depleted uranium/p olyethylene shells
摘要
Abstract
A series of neutron integral fundamental researches of thorium nuclear data in set-ups containing thorium samples is carried out. One-dimensional alternate depleted uranium/polyethylene shells containing thorium samples are constructed by referring to the conceptual design of fusion-fission hybrid reactor, where a D-T neutron source driven by accelerator is used to simulate the fusion core of the reactor. 232Th (n,γ) reaction rates in samples located at different positions in the shells are measured in 5% uncertainty by using activated thorium sample decay γ-ray off-line measurement technique. The results show that the moderation of polyethylene to 14.1 MeV neutron will efficiently increase the capture rate of thorium, and the depleted uranium is also conducible to this increase obviously. The comparison between our measured data and the results available from mainstream nuclear data bank shows that the calculation results from ENDF/B-VI.6 and JENDL-3.3 are around 6% higher than the experimental results, while the newer ENDF/B-VII.0 will achieve better results, around 4% higher than the experimental results. We recommend the ENDF/B-VII.0 to be used in one-dimensional alternate depleted uranium/polyethylene shells related conceptual design when calculating the 232Th (n,γ) reaction rate.关键词
钍/俘获率/D-T中子/贫铀Key words
thorium/capture rate/D-T neutron/depleted uranium引用本文复制引用
羊奕伟,刘荣,蒋励,鹿心鑫,王玫,严小松..一维贫铀/聚乙烯交替系统中D-T中子诱发的232Th（n,γ）反应率的测定与分析[J].物理学报,2014,(16):1-8,8.基金项目
国家自然科学基金(批准号:91226104)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.91226104) （批准号:91226104）
