Measurement of the differential cross sections and angle-integrated cross sections of the <sup>6</sup>Li(n, t)<sup>4</sup>He reaction from 1.0 eV to 3.0 MeV at the CSNS Back-n white neutron source *
Huaiyong Bai, Ruirui Fan, Haoyu Jiang, Zengqi Cui, Yiwei Hu, Guohui Zhang, Zhenpeng Chen, Wei Jiang, Yi Han, Jingyu Tang, Liang Zhou, Qi An, Jie Bao, Ping Cao, Qiping Chen, Yonghao Chen, Pinjing Cheng, C. Q. Feng, Minhao Gu, Fengqin Guo, Changcai Han, Zijie Han, Guozhu He, Yongcheng He, Yuefeng He, Han‐Xiong Huang, Weiling Huang, Xiru Huang, X. L. 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
Abstract
Abstract 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.