Measurement of the Br(n,gamma) cross sections up to stellar s-process temperatures at the CSNS Back-n

• 作者： Yang, Gaole ¹ An, Zhendong ^1,2,3,4 Jiang, Wei ^5,6 Li,Xiankai ^7,1 Qiu, Weiwei ^8,3,4 Liao, Zhengfa ^8,3,4 Zhuang, Ziyue ^8,3,4 Zhang, Xiaoping ^3,4 Chen,Shengli ⁸ Xiao, Erxi ⁸ Fang,Xiao ⁸ Li,XinXiang ^7,2,9 Hu, Xinrong ^2,9 Jiang, Bing ^2,9 Wang, Jincheng ¹⁰ Ren, Jie ¹⁰ Luo, Wen ⁷ Zhu, ZhiChao ⁷ Lan, Haoyang ⁷ Cao, Zongwei ⁷ Ma, Xu ^11,10 Liu, Yingdu ¹¹ Wang, Pusen ¹¹ Yang,Yi ¹² Su,Ping ¹² Deng, Xiangai ¹² He, Wanbing ¹² Ma, Chunwang ^13,14 Wang, Yuting ^13,14 Dai, Zhitao ¹⁵ He, Pengqin ¹ Tang, Renguang ¹ Zhou, Tao ¹ Wang, Jing ¹ Yi, Han ^5,6 Zhang, Yue ^5,6 Chen, Yonghao ^5,6 Fan, Ruirui ^5,6 Gao, Keqing ^5,6 Li, Qiang ^5,6 Sun, Kang ^5,6 Tan, Zhixin ^5,6 Gu, Minhao ^5,6 Jing, Hantao ^5,6 Tang,Jingyu ^16,5,6
• 作者单位：
  1.  School of Physics and Astronomy, Sun Yat-sen University
  2.  Shanghai Institute of Applied Physics, Chinese Academy of Sciences
  3.  State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology
  4.  CNSA Macau Center for Space Exploration and Science
  5.  Institute of High Energy Physics, Chinese Academy of Sciences
  6.  Spallation Neutron Source Science Center
  7.  School of Nuclear Science and Technology, University of South China
  8.  Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University
  9.  University of Chinese Academy of Sciences
  10.  Key Laboratory of Nuclear Data,China Institute of Atomic Energy
  11.  Shool of Materials Science and Engineering, Xiangtan University
  12.  Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University
  13.  Institute of Particle and Nuclear Physics, Henan Normal University
  14.  School of Physics, Henan Normal University
  15.  Shenzhen Center, Cancer hospital, Chinese Academy of Medical Sciences
  16.  School of Nuclear Science and Technology,University of Science and Technology of China
• 通讯作者： An, Zhendong  Email:anzhendong@mail.sysu.edu.cn
• 提交时间：2023-09-12

摘要: The neutron capture cross sections (${n, upgamma}$) of Bromine was performed with the time-of-flight (TOF) technique at the Back-n facility of the China Spallation Neutron Source (CSNS). Prompt $ upgamma$-rays originating from neutron-induced capture events were detected by four C${}_6$D${}_6$ detectors. The pulse height weighting technique (PHWT) and the double-bunch unfolding method based on the Bayesian theory were used in the data analysis. To obtain reliable measurement results, background deductions, normalization, and corrections were carefully considered. The multilevel R-matrix Bayesian code SAMMY was used to extract the resonance parameters in the resolved resonance region (RRR). The average cross sections in unresolved resonance region the was obtained from 10 to 400 keV. The experimental results were compared with the data of several evaluated libraries and previous experiments in the resolved and unresolved resonance region. The TALYS code was used to describe the average cross sections in the unresolved resonance region. Astrophysical Maxwell average cross sections (MACSs) of ${}^{79,81}$Br from $ kT $ = 5 to 100 keV was calculated over a sufficiently wide range of neutron energies. At a thermal energy of $kT=30$ keV, the MACS value for ${}^{79}$Br 638$ pm$64 mb is in good agreement with the KADoNiS recommended value. By contrast, the value of 293$ pm$29 mb for ${}^{81}$Br is substantially higher than those of the evaluated database and the KADoNiS recommended value.

• 来自： Zhen dong An
• 分类： 物理学 >> 核物理学 物理学 >> 地球物理学、天文学和天体物理学
• 投稿状态： 未投稿
• 引用： ChinaXiv:202309.00111 (或此版本 ChinaXiv:202309.00111V1)
  DOI:10.12074/202309.00111V1
  CSTR:32003.36.ChinaXiv.202309.00111.V1
• 推荐引用方式： Yang, Gaole,An, Zhendong,Jiang, Wei,Li,Xiankai,Qiu, Weiwei,Liao, Zhengfa,Zhuang, Ziyue,Zhang, Xiaoping,Chen,Shengli,Xiao, Erxi,Fang,Xiao,Li,XinXiang,Hu, Xinrong,Jiang, Bing,Wang, Jincheng,Ren, Jie,Luo, Wen,Zhu, ZhiChao,Lan, Haoyang,Cao, Zongwei,Ma, Xu,Liu, Yingdu,Wang, Pusen,Yang,Yi,Su,Ping,Deng, Xiangai,He, Wanbing,Ma, Chunwang,Wang, Yuting,Dai, Zhitao,He, Pengqin,Tang, Renguang,Zhou, Tao,Wang, Jing,Yi, Han,Zhang, Yue,Chen, Yonghao,Fan, Ruirui,Gao, Keqing,Li, Qiang,Sun, Kang,Tan, Zhixin,Gu, Minhao,Jing, Hantao,Tang,Jingyu.(2023).Measurement of the Br(n,gamma) cross sections up to stellar s-process temperatures at the CSNS Back-n.中国科学院科技论文预发布平台.doi:10.12074/202309.00111V1 (点此复制)