Measurement of the neutron total cross section of Iron at the Back-n white neutron source of CSNS
The neutron total cross section of iron ( nat Fe) plays an important role in the basic science of nuclear physics, nuclear technology and nuclear energy application. A new measurement of the total cross section of iron from 0.3 eV to 150 MeV was carried out in single and double bunch modes by transmission method and time of flight method with multi-cell fast fission ionization chamber (FIC) with 235 U and 238 U coating materials at the China Spallation Neutron Source (CSNS). Normalized fission counts-neutron energy spectra for sample-in and sample-out states were obtained and superimposed. The Bayesian method was used to eliminate the influence of the double-bunch problem on neutron measurement in the energy region above 10 keV. The transmissions obtained in single bunch and unfolded in double bunch coincided well. From 0.3 eV to 150 MeV, the ratio of most energy points of cross section in single bunch and in double bunch fluctuates within 10 %. In the energy range of 0.3 eV to 10 keV, the experimental results using 20 mm and 40 mm thickness iron samples both agree very well with the evaluated data of JEFF-3.3 and ENDF/B-VIII.0 at most energy points, fluctuating within 3 %. In the energy range of 10 keV to 150 MeV, the results agree well with the evaluated data in terms of values and trends. The main resonance peaks of the total cross section of iron at the energies of 3.94 keV, 6.24 keV, 7.76 keV, 27.9 keV, 52.1 keV, 74.1 keV, 83.9 keV, 141 keV, 170 keV, 188 keV and 386 keV are well represented in our results. The relative uncertainties of the total cross sections using the 40 mm iron sample by FIC- 235 U are within 2 % at most energy points. In 1.5 MeV-140 MeV region, the relative uncertainties of the total cross section using the 20 mm iron and 40 mm iron samples by FIC- 238 U are around 2 % and 1 %, respectively. The total cross section results can be used as a reference for nuclear data evaluation.
Authors
- Xianpeng Zhang
- Jie Ren (ORCID: https://orcid.org/0000-0003-2806-7226)
- Linhao Zhang (ORCID: https://orcid.org/0000-0002-8484-1733)
- Han‐Xiong Huang (ORCID: https://orcid.org/0000-0001-8805-3040)
- Ling Kang (ORCID: https://orcid.org/0000-0002-1540-9429)
- Shengda Tang
- Liqun Shi (ORCID: https://orcid.org/0000-0002-9728-0496)
- Xiao Li (ORCID: https://orcid.org/0000-0002-9652-5658)
- L. Zhou (ORCID: https://orcid.org/0009-0005-7256-4475)
- Yang Hong (ORCID: https://orcid.org/0009-0002-6274-1747)
- Zhixin Tan (ORCID: https://orcid.org/0000-0002-9764-0682)
- Binbin Qi (ORCID: https://orcid.org/0000-0003-4239-9008)
- C. Q. Feng (ORCID: https://orcid.org/0000-0001-7859-7896)
- Yiwei Hu
- Mohan Zhang
- Ruirui Fan (ORCID: https://orcid.org/0000-0001-9486-451X)
- Guohui Zhang (ORCID: https://orcid.org/0000-0001-5194-9222)
- Jie Bao (ORCID: https://orcid.org/0000-0002-5642-1993)
- Pengcheng Wang (ORCID: https://orcid.org/0000-0003-3439-0601)
- Guangyuan Luan
- Yongcheng He (ORCID: https://orcid.org/0000-0003-2865-4623)
- Zhijie Jiang (ORCID: https://orcid.org/0000-0002-8817-2784)
- Xichao Ruan
- Xuan Wu (ORCID: https://orcid.org/0000-0001-8737-1303)
- Changcai Han (ORCID: https://orcid.org/0000-0003-4879-1748)
- Haoyu Jiang (ORCID: https://orcid.org/0000-0003-3225-6214)
- Jingyu Tang (ORCID: https://orcid.org/0000-0002-5694-3783)
- Zhihao Zhou (ORCID: https://orcid.org/0009-0007-4990-1503)
- Yonghao Chen (ORCID: https://orcid.org/0000-0002-5736-7271)
- Chao Li (ORCID: https://orcid.org/0009-0004-4147-9537)
- Jiawen Li (ORCID: https://orcid.org/0000-0002-0030-8457)
- Zhiyong Zhang (ORCID: https://orcid.org/0000-0001-6236-6399)
- Zhaohui Wang (ORCID: https://orcid.org/0000-0001-7994-7464)
- Yang Li (ORCID: https://orcid.org/0000-0002-3118-7467)
- Jie Liu (ORCID: https://orcid.org/0000-0003-3745-7541)
- Zhe Chen (ORCID: https://orcid.org/0000-0002-2919-4481)
- Fanzhen Feng
- Qiwei Zhang (ORCID: https://orcid.org/0000-0003-4376-007X)
- Yuliang Zhang (ORCID: https://orcid.org/0000-0002-9191-6019)
- Gong Li (ORCID: https://orcid.org/0000-0002-2817-0162)
- Kejun Zhu (ORCID: https://orcid.org/0000-0002-5473-235X)
- Guozhu He
- Kang Sun (ORCID: https://orcid.org/0009-0006-5247-4162)
- Ping Cao (ORCID: https://orcid.org/0000-0001-7782-9720)
- Bo Li (ORCID: https://orcid.org/0009-0002-8003-3090)
- Yi Han (ORCID: https://orcid.org/0000-0001-7873-1020)
- Weihua Jia
- Anchuan Fan
- Keqing Gao
- Qiang Li (ORCID: https://orcid.org/0009-0006-7505-5913)
- Changjun Ning (ORCID: https://orcid.org/0000-0002-7358-2502)
- Xiao-Guang Wu
- Yue Zhang (ORCID: https://orcid.org/0009-0004-1072-2581)
- Minhao Gu
- Likun Xie
- Jiangbo Bai
- Lijiao Wang
- Zhengyao Jin
- Yongji Yu
- Haofan Bai (ORCID: https://orcid.org/0009-0001-3746-324X)
- Zhaohui Song (ORCID: https://orcid.org/0000-0002-8583-6768)
- Zengqi Cui (ORCID: https://orcid.org/0009-0002-1558-7572)
- Wei Jiang (ORCID: https://orcid.org/0000-0002-9027-4974)
- Shubin Liu
- Maoyuan Zhao
Institutions
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- Fudan University (CN)
- China Institute of Atomic Energy (CN)
- China Spallation Neutron Source (CN)
- Institute of Modern Physics (CN)
- Institute of High Energy Physics (CN)
- Northwest Institute of Nuclear Technology (CN)
- State Key Laboratory of Nuclear Physics and Technology
Publication Details
- Journal
- Physics Letters B
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1016/j.physletb.2025.139355
- Citations
- 2
- Primary Topic
- Nuclear Physics and Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.77
Funders
- National Natural Science Foundation of China
- Foundation of President of China Academy of Engineering Physics
- National Key Research and Development Program of China