Measurement of the differential cross sections and angle-integrated cross sections of the ~6Li(n,t)~4 He reaction from 1.0 eV to 3.0 MeV at the CSNS Back-n white neutron source  

作　　者：Huaiyong Bai Ruirui Fan Haoyu Jiang Zengqi Cui Yiwei Hu Guohui Zhang Zhenpeng Chen Wei Jiang Han Yi Jingyu Tang Liang Zhou Qi An Jie Bao Ping Cao Qiping Chen Yonghao Chen Pinjing Cheng Changqing Feng Minhao Gu Fengqin Guo Changcai Han Zijie Han Guozhu He Yongcheng He Yuefeng He Hanxiong Huang Weiling Huang Xiru Huang Xiaolu Ji Xuyang Ji Hantao Jing Ling Kang Mingtao Kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Rong Liu Shubin Liu Xingyan Liu Guangyuan Luan Yinglin Ma Changjun Ning Binbin Qi Jie Ren Xichao Ruan Zhaohui Song Hong Sun Xiaoyang Sun Zhijia Sun Zhixin Tan Hongqing Tang Pengcheng Wang Qi Wang Taofeng Wang Yanfeng Wang Zhaohui Wang Zheng Wang Jie Wen Zhongwei Wen Qingbiao Wu Xiaoguang Wu Xuan Wu Likun Xie Yiwei Yang Li Yu Tao Yu Yongji Yu Jing Zhang Linhao Zhang Liying Zhang Qingmin Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Yingtan Zhao Zuying Zhou Danyang Zhu Kejun Zhu Peng Zhu 白怀勇;樊瑞睿;江浩雨;崔增琪;胡益伟;张国辉;陈振鹏;蒋伟;易晗;唐靖宇;周良;安琪;鲍杰;曹平;陈琪萍;陈永浩;程品晶;封常青;顾旻皓;郭凤琴;韩长材;韩子杰;贺国珠;何泳成;何越峰;黄翰雄;黄蔚玲;黄锡汝;季筱路;吉旭阳;敬罕涛;康玲;康明涛;李波;李论;李强;李晓;李洋;李样;刘荣;刘树彬;刘星言;栾广源;马应林;宁常军;齐斌斌;任杰;阮锡超;宋朝晖;孙虹;孙晓阳;孙志嘉;谭志新;唐洪庆;王鹏程;王琦;王涛峰;王艳凤;王朝晖;王征;文杰;温中伟;吴青彪;吴晓光;吴煊;解立坤;羊奕伟;于莉;余滔;于永积;张旌;张林浩;张利英;张清民;张奇玮;张显鹏;张玉亮;张志永;赵映潭;周祖英;朱丹阳;朱科军;朱鹏(State Key Laboratory of Nuclear Physics and Technology,Institute of Heavy Ion Physics,School of Physics,Peking University,Beijing 100871,China;Sate Key Laboratory of Particle Detection and Electronics;Institute of High Energy Physics,Chinese Academy of Sciences(CAS),Beijing 100049,China;Dongguan Neutron Science Center,Dongguan 523803,China;Physics Department,Tsinghua University,Beijing 100084,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China;University of South China,Hengyang 421001,China;Northwest Institute of Nuclear Technology,Xi’an 710024,China;Department of Engineering and Applied Physics,University of Science and Technology of China,Hefei 230026,China;Beihang University,Beijing 100083,China;Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,Institute of Heavy Ion Physics,School of Physics,Peking University,Beijing 100871,China [2]Sate Key Laboratory of Particle Detection and Electronics [3]Institute of High Energy Physics,Chinese Academy of Sciences(CAS),Beijing 100049,China [4]Dongguan Neutron Science Center,Dongguan 523803,China [5]Physics Department,Tsinghua University,Beijing 100084,China [6]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [7]Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China [8]Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China [9]University of South China,Hengyang 421001,China [10]Northwest Institute of Nuclear Technology,Xi’an 710024,China [11]Department of Engineering and Applied Physics,University of Science and Technology of China,Hefei 230026,China [12]Beihang University,Beijing 100083,China [13]Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Chinese Physics C》2020年第1期58-85,共28页中国物理C（英文版）

基　　金：Supported by National Key R&D Program of China(2016YFA0401604);National Natural Science Foundation of China(11775006);Science and Technology on Nuclear Data Laboratory and China Nuclear Data Center

摘　　要：The^6 Li(n,t)~4 He reaction was measured as the first experiment involving neutron-induced charged particle emission reactions at the CSNS(China Spallation Neutron Source)Back-n white neutron source.The differential cross-sections of the^6 Li(n,t)~4 He reaction at 15 detection angles ranging from 19.2°to 160.8°are obtained from 1.0 eV to 3.0 MeV at 80 neutron energy points;for 50 energy points below 0.1 MeV they are reported for the first time.The results indicate that the anisotropy of the emitted tritium is noticeable above E_n=100 eV.The angle-integrated cross-sections are also obtained.The present differential cross-sections agree in general with the previous evaluations,but there are some differences in the details.More importantly,the present results indicate that the cross-sections of the^6 Li(n,t)~4 He reaction might be overestimated by most evaluations in the 0.5-3.0 MeV region,although they are recommended as standards below 1.0 MeV.The ~6 Li(n,t)~4 He reaction was measured as the first experiment involving neutron-induced charged particle emission reactions at the CSNS(China Spallation Neutron Source) Back-n white neutron source.The differential cross-sections of the ~6 Li(n,t)~4 He reaction at 15 detection angles ranging from 19.2° to 160.8° are obtained from 1.0 eV to 3.0 MeV at 80 neutron energy points;for 50 energy points below 0.1 MeV they are reported for the first time.The results indicate that the anisotropy of the emitted tritium is noticeable above E_n=100 eV.The angle-integrated cross-sections are also obtained.The present differential cross-sections agree in general with the previous evaluations,but there are some differences in the details.More importantly,the present results indicate that the cross-sections of the ~6 Li(n,t)~4 He reaction might be overestimated by most evaluations in the 0.5-3.0 MeV region,although they are recommended as standards below 1.0 MeV.

关 键 词：~6Li(n t)~4He reaction differential cross-section angle-integrated cross-section LPDA 

分 类 号：O571.5[理学—粒子物理与原子核物理]