Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

Liu, Xingyan; Yang, Yiwei; Liu, Rong; Wen, Jie; Wen, Zhengqi; Han, Zijie; Ren, Zhongzhou; An, Qi; Bai, Huaiyong; Bao, Jie; Cao, Ping; Chen, Qi-Ping; Chen, Yonghao; Cheng, Pinjing; Cui, Zengqi; Fan, Ruirui; Feng, C. Q.; Gu, Min; Feng, Guo; Han, Changcai; He, Guo‐Zhong; He, Yongcheng; He, Yuefeng; Huang, Hanxiong; Huang, Weiling; Huang, Xiru; Ji, Xiaolu; Ji, Xiuling; Jiang, Haoyu; Jiang, Wei; Jing, Hantao; Kang, Lihua; Kang, Mingtao; Li, Bo; Li, Lun; Li, Qiang; Li, Xiao; Li, Yang; Liu, Shubin; Luan, Guangyuan; Ma, Y.; Ning, Changjun; Qi, Binbin; Ren, Jie; Ruan, Xichao; Zhang, Song; Sun, Hong-xiang; Sun, Xiaoyang; Sun, Zhi‐Wei; Tan, Zhixin; Tang, Hongqing; Tang, Jingyu; Wang, Pengcheng; Wang, Qi; Wang, Taofeng; Wang, Yanfeng; Wang, Zhaohui; Wang, Zheng; Wu, Qingbiao; Wu, X.; Wu, Xuan; Xie, Likun; Yu, Lei; Yu, Tao; Yu, Yongji; Zhang, Guohui; Zhang, Jing; Zhang, Linhao; Zhang, Liying; Zhang, Qingmin; Zhang, Qiwei; Zhang, Xianpeng; Zhang, Yuliang; Zhi-yong, Zhang; Zhao, Yingtan; Zhou, Liang; Zhou, Zuying; Zhu, Dan; Zhu, K.; Zhu, Ping

doi:10.1007/s41365-019-0660-9

Cited by 18 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With respect to the Back-n white neutron source, neutrons are produced via 1.6 GeV proton-induced spallation reactions on a Tungsten target. Two endstations (ES), which are approximately 55 m (ES#1) and 76 m (ES#2) away from the spallation target, have been built on the Back-n neutron source for neutron-induced nuclear data measurements, irradiation tests, neutron imaging, and detector calibrations [7].…”

Section: A Experimental Setupmentioning

confidence: 99%

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Xue 薛,

Feng 冯,

Chen 陈

et al. 2023

Chinese Phys. C

View full text Add to dashboard Cite

The neutron-induced total cross-section of 209Bi is crucial for the physical design and safety assessment of lead-based fast reactors, and the quality of experimental data should be improved for evaluation and application. A recent experiment was conducted on the back-streaming white neutron beamline (Back-n) at the China Spallation Neutron Source (CSNS) using the neutron total cross-section spectrometer (NTOX). The neutron energy was determined using a fast multi-cell fission chamber and the time-of-flight technique. Two high-purity bismuth samples, 6 mm and 20 mm in thickness, were chosen for neutron transmission measurements and comparisons. The neutron total cross-sections of 209Bi, ranging from 0.3 eV to 20 MeV, were derived considering neutron flight time determination, flight path calibration, and background subtraction. A comparison of the experimental results with the data in the ENDF/B-VIII.0 library showed fair agreement, and the point-wise cross-sections were found to be consistent with existing experimental data. Special attention was given to the determination of resonance parameters, which were analyzed using the R -matrix code SAMMY and Bayesian method in the 0.5 keV to 20 keV energy range. The extracted resonance parameters were compared to previously reported results and evaluated data. This study is recognized as the first one where the neutron total cross-section of bismuth across such a broad energy spectrum is measured in a single measurement or experiment, and it provides valuable data for the assessment of related reaction information for evaluated libraries and the advancement of lead-bismuth-based nuclear systems.

show abstract

Section: A Experimental Setupmentioning

confidence: 99%

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Xue 薛,

Feng 冯,

Chen 陈

et al. 2023

Chinese Phys. C

View full text Add to dashboard Cite

show abstract

“…CSNS质子束流的平均打靶功率为100 kW, 束流频率为25 Hz, 中子产额约2 × 10 16 /s [12] , 可提供 0.4 eV -200 MeV的连续能量中子 . CSNS Back-n在距离中子靶站55.0 m和76.0 m处有两个实验大厅, 即实验厅-1 (ES#1)和实验厅-2 (ES#2) [14] .…”

Section: 实验装置及探测系统unclassified

Measurement of total neutron cross section of natural lithium at China Spallation Neutron Source Back-n facility

Zhang¹,

Jiang²,

Chen³

et al. 2022

Acta Phys. Sin.

View full text Add to dashboard Cite

Lithium is one of the main materials of fuel carrier salt in molten salt reactors. Its neutron cross section provides an important basic datum for physical design of molten salt reactor core and for evaluating the safety of the core during operation. The total neutron cross sections of natural lithium samples with thickness values of 8.00 mm and 15.0 mm are measured, respectively, in an energy range from 0.4 eV to 20 MeV by using a neutron total cross section spectrometer (NTOX) with the transmission method at the Back-n white neutron source of China Spallation Neutron Source (CSNS Back-n) with a 76.0 m time-of-flight path. High quality experimental data are obtained, especially in the energy region of keV and below, which supply a significative supplement of the data, thereby providing more abundant and reliable experimental data for nuclear data evaluation of lithium. Additionally, a theoretical analysis is carried out under the guidance of 1/<i>v</i> law and the multilevel R-matrix theory. And the resonance parameters of n+<sup>6,7</sup>Li reaction around the energy of 260 keV are extracted from the measured data.

show abstract

“…In the double-bunch mode with an interval of approximately 410 ns, the measured neutron energy spectra suffer from the superposition effect in the energy region above keV. The measured spectra with 235 U cells from 10 keV to 20 MeV and 238 U cells from 1 to 20 MeV were unfolded by the unfolding code (De-moUnfolding_v3.1) based on the Bayesian principle [31]. The published or submitted results are briefly introduced below.…”

Section: B Experiments On Total Cross-sectionsmentioning

confidence: 99%

Initial years’ neutron-induced cross-section measurements at the CSNS Back-n white neutron source *

Tang¹,

Liu²,

Zhang³

et al. 2021

Chinese Phys. C

Self Cite

View full text Add to dashboard Cite

The Back-n white neutron source (known as Back-n) is based on back-streaming neutrons from the spallation target at the China Spallation Neutron Source (CSNS). With its excellent beam properties, e.g., a neutron flux of approximately 1.8×107 n/cm2/s at 55 m from the spallation target, energy range spanning from 0.5 eV to 200 MeV, and time-of-flight resolution of a few per thousand, along with the equipped physical spectrometers, Back-n is considered to be among the best facilities in the world for carrying out nuclear data measurements. Since its completion and commencement of operation in May 2018, five types of cross-section measurements concerning neutron capture cross-sections, fission cross-sections, total cross-sections, light charged particle emissions, in-beam gamma spectra, and more than forty nuclides have been measured. This article presents an overview of the experimental setup and result analysis on the neutron-induced cross-section measurements and gamma spectroscopy at Back-n in the initial years.

show abstract

Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

Cited by 18 publications

References 15 publications

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Measurement of total neutron cross section of natural lithium at China Spallation Neutron Source Back-n facility

Initial years’ neutron-induced cross-section measurements at the CSNS Back-n white neutron source *

Contact Info

Product

Resources

About

Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

Cited by 18 publications

References 15 publications

Measurement and analysis of the neutron-induced total cross-sections of 209Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Measurement and analysis of the neutron-induced total cross-sections of 209Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Measurement of total neutron cross section of natural lithium at China Spallation Neutron Source Back-n facility

Initial years’ neutron-induced cross-section measurements at the CSNS Back-n white neutron source *

Contact Info

Product

Resources

About

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*

Measurement and analysis of the neutron-induced total cross-sections of ²⁰⁹Bi from 0.3 eV to 20 MeV on the Back-n at CSNS*