1. Cross section measurement of neutron capture reaction based on back-streaming white neutron source at China spallation neutron source
- Author
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Wang Li-Jiao, Zhang Yu-liang, Feng Chang-Qing, Sun Qi, Zhao Yubin, Sun Xiao-Yang, Fan Rui-Rui, Sun Hong, Han Changcai, Wu Qing-Biao, Yu Yong-Ji, Kang Ling, Tang Jing-Yu, Zhu Xinghua, Jiang Zhi-Jie, Chen Zhen, Tan Zhi-Xin, An Qi, Luan Guang-Yuan, Gao Ke-Qing, Song Zhaohui, Bai Huaiyong, Tang Xin-Yi, Jiang Haoyu, Wen Jie, Wang Pengcheng, Zhu Dan-Yang, Ning Chang-Jun, Qi Bin-Bin, Chen Qiping, Chen Hao-Lei, Chen Yong-Hao, Han Zijie, Li Qiang, Li Jia-Wen, Huang Xi-Ru, Zhou Zu-Ying, He Yong-Cheng, Li Xiao, Wang Zhao-Hui, Wang Taofeng, Zhang Qi-Wei, Ji Xu-Yang, Zhang Xian-Peng, Gu Min-Hao, Jing Han-Tao, Cui Zeng-Qi, Wu Xiaoguang, Song Ying-Peng, Mu Qi-Li, Ren Zhi-Zhou, Tang Hong-Qing, Ji Xiao-Lu, Li Chao, Zhang Guohui, Wang Qi, Liu Xing-Yan, Yu Li, Yi Han, Bao Yu, He Guo-Zhu, Li Lun, Zhang Lin-Hao, Liu Shubin, Zhang Zhi-Yong, Bao Jie, Yang Yi-Wei, Kang Ming-Tao, Ruan Xi-Chao, Sun Kang, Sun Zhijia, Yu Tao, Cao Ping, Zhu Ke-Jun, Li Bo, Ren Jie, Zhu Peng, Huang Han-Xiong, Wu Xuan, Zhou Lu-Ping, Xie Li-Kun, Huang Wei-Ling, Hong Yang, Liu Rong, Wen Zhongwei, Chen Yu-Kai, Tian Bin-Bin, Jiang Wei, and Li Yang
- Subjects
Physics ,Nuclear physics ,Cross section (physics) ,Neutron capture ,Neutron cross section ,Nuclear astrophysics ,General Physics and Astronomy ,Neutron source ,Nuclear data ,Neutron radiation ,Spallation Neutron Source - Abstract
The data of neutron capture cross section are very important for the research of nuclear astrophysics, advanced nuclear energy development. Owing to the limitation of neutron source and detector, the experimental data of neutron capture cross section in an energy range of 1 eV–10 keV were almost blank in China. The first Chinese gamma-ray total absorption facility has been constructed in the key laboratory of nuclear data at China institute of atomic energy, which consists of 40 BaF2 detector units. The BaF2 crystal shell with a thickness of 15 cm and an inner radius of 10 cm covers 95.2% of the solid angle. On-line measurement method of neutron capture reaction cross section is established on the back-streaming white neutron source of China spallation neutron source by using the upgraded facility. The cross section of 197Au neutron capture reaction is measured for the first time under the experimental condition of irregular 30 mm neutron beam spot. The measured position of resonance peak is well consistent with the relevant data of ENDF evaluation database, which verifies the reliability of the measurement device and measurement technology, and thus laying the foundation for the acquisition of high precision cross section in future.
- Published
- 2021