Cumulative fission yield measurements with 14.7 MeV neutrons on ^(238)U  

作　　者：杨宪林 兰长林 聂阳波 江历阳 邱奕嘉 葛裕杰 陈红涛 张凯 魏玉婷 王家豪 姜功 阮锡超 杨毅 Xianlin Yang;Changlin Lan;Yangbo Nie;Liyang Jiang;Yijia Qiu;Yujie Ge;Hongtao Chen;Kai Zhang;Yuting Wei;Jiahao Wang;Gong Jiang;Xichao Ruan;Yi Yang(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [2]Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China

出　　处：《Chinese Physics C》2023年第2期100-106,共7页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China (11975113)。

摘　　要：The fission yield data in the 14 MeV energy neutron induced fission of^(238)U play an important role in decay heat calculations and generation-Ⅳ reactor designs.In order to accurately measure fission product yields(FPYs)of^(238)U induced by 14 MeV neutrons,the cumulative yields of fission products ranging from^(92)Sr to^(147)Nd in the^(239)U(n,f) reaction with a 14.7 MeV neutron were determined using an off-line γ-ray spectrometric technique.The14.7 MeV quasi-monoenergetic neutron beam was provided by the K-400 D-T neutron generator at China Academy of Engineering Physics(CAEP).Fission products were measured by a low background high purity germanium gamma spectrometer.The neutron flux was obtained from the^(93)Nb(n.2n)^(92m)Nb reaction,and the mean neutron energy was calculated using the cross-section ratios for the^(90)Zr(n,2n)^(89)Zr and^(93)Nb(n,2n)^(92m)Nb reactions.With a series of corrections,high precision cumulative yields of 20 fission products were obtained.Our FPYs for the^(238)U(n,f) reaction at 14.7 MeV were compared with the existing experimental nuclear reaction data and evaluated nuclear data,respectively.The results will be helpful in the design of a generation-Ⅳ reactor and the construction of evaluated fission yield databases.

关 键 词：^(238)U fission yields DT neutron source activation method 

分 类 号：O571.43[理学—粒子物理与原子核物理]