Neutron capture reaction cross-section data processing and resonance parameter analysis of <sup>197</sup>Au based on white light neutron source

Luo Hao-Tian; Zhang Qi-Wei; Luan Guang-Yuan; Wang Xiao-Yu; Zou Chong; Ren Jie; Ruan Xi-Chao; He Guo-Zhu; Bao Jie; Sun Qi; Huang Han-Xiong; Wang Zhao-Hui; Wu Hong-Yi; Gu Min-Hao; Yu Tao; Xie Li-Kun; Chen Yong-Hao; An Qi; Bai Huai-Yong; Bao Yu; Cao Ping; Chen Hao-Lei; Chen Qi-Ping; Chen Yu-Kai; Chen Zhen; Cui Zeng-Qi; Fan Rui-Rui; Feng Chang-Qing; Gao Ke-Qing; Han Chang-Cai; Han Zi-Jie; He Yong-Cheng; Hong Yang; Huang Wei-Ling; Huang Xi-Ru; Ji Xiao-Lu; Ji Xu-Yang; Jiang Wei; Jiang Hao-Yu; Jiang Zhi-Jie; Jing Han-Tao; Kang Ling; Kang Ming-Tao; Li Bo; Li Chao; Li Jia-Wen; Li Lun; Li Qiang; Li Xiao; Li Yang; Liu Rong; Liu Shu-Bin; Liu Xing-Yan; Mu Qi-Li; Ning Chang-Jun; Qi Bin-Bin; Ren Zhi-Zhou; Song Ying-Peng; Song Zhao-Hui; Sun Hong; Sun Kang; Sun Xiao-Yang; Sun Zhi-Jia; Tan Zhi-Xin; Tang Hong-Qing; Tang Jing-Yu; Tang Xin-Yi; Tian Bin-Bin; Wang Li-Jiao; Wang Peng-Cheng; Wang Qi; Wang Tao-Feng; Wen Jie; Wen Zhong-Wei; Wu Qing-Biao; Wu Xiao-Guang; Wu Xuan; Yang Yi-Wei; Yi Han; Yu Li; Yu Yong-Ji; Zhang Guo-Hui; Zhang Lin-Hao; Zhang Xian-Peng; Zhang Yu-Liang; Zhang Zhi-Yong; Zhao Yu-Bin; Zhou Lu-Ping; Zhou Zu-Ying; Zhu Dan-Yang; Zhu Ke-Jun; Zhu Peng; Zhu Xing-Hua

doi:10.7498/aps.73.20231957

Abstract

Neutron capture reaction is one of the neutron reactions and plays an important role in using reactor control rods and shell materials, designing nuclear device structures, and studying nuclear astrophysics S processes and element origins. The 4π BaF₂ detection device has advantages such as high time resolution, low neutron sensitivity, and high detection efficiency, thus making it suitable for measuring neutron radiation capture reaction cross-section data. In order to fill the gap in our neutron capture reaction data in the keV energy range and improve their accuracy, the Key Laboratory of Nuclear Data at the Chinese Institute of Atomic Energy (CIAE) has established a Gamma Total Absorption Facility (GTAF), which consists of 28 hexagonal BaF₂ crystals and 12 pentagonal BaF₂ crystals to form a spherical shell with an external diameter of 25 cm and an internal diameter of 10 cm, covering 95.2% of the solid angles. The Back-n beam line of the Chinese Spallation Neutron Source (CSNS) is a back-streaming white beam line that covers neutron energy ranging from a few eV to several hundred MeV, making it suitable for measuring neutron capture cross-sections. The reaction cross-section data of ¹⁹⁷Au is measured by using GTAF on the Back-n beam line. The measurement data are preliminarily background deducted through energy screening, PSD method, and crystal multiplicity screening. Subsequently, the background is analyzed and deducted based on the measurement data of ^natC and empty samples, and the yield of ¹⁹⁷Au capture reaction is obtained. Resonance parameters are a set of parameters extracted from experimental data to describe the resonance curve, which can eliminate the influence of experimental conditions on resonance data and are more important than the cross-section obtained from experiments. The resonance energy, neutron resonance width, and gamma resonance width parameters of ¹⁹⁷Au at 1–100 eV are fitted by using the SAMMY program. From the comparison between the resonance curves obtained from experimental measurements and the resonance parameters obtained from fitting with the ENDF/B-VIII.0 database, it can follow that the experimental measurement results are in good agreement with the database, nevertheless, there exist some differences in the resonance parameter, which may be due to the GTAF energy resolution, Back-n neutron spectrum measurement accuracy, and the experimental background deduction method. Our next work is to identify the sources of difference.

Keywords:

Authors and contacts

1.
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.
Spallation Neutron Source Science Center, Dongguan 523803, China
4.
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China
5.
State Key Laboratory of Particle Detection and Electronics, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
6.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
7.
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
8.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
9.
University of Chinese Academy of Sciences, Beijing 100049, China
10.
Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
11.
School of Physics, Beihang University, Beijing 100083, China
12.
Huaneng Shandong Shidao Bay Nuclear Power Co.Ltd, Rongcheng 264312, China

Corresponding author: Zhang Qi-Wei, zqwvictor@126.com ; Ruan Xi-Chao, xichao_ruan@126.com ;

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11975317, 11975318, 12275363), the Key Laboratory of Nuclear Data Foundation, China (Grant No. JCKY2022201C158), and the Continuous-Support Basic Scientific Research Project, China (Grant No. BJ010261223282).

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References

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Cited By

图 1 中子辐射俘获反应退激示意图

Figure 1. Schematic diagram of deexcitation of neutron capture reaction.

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图 2 反角白光束线示意图

Figure 2. Schematic diagram of Back-n.

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图 3 GTAF照片

Figure 3. Photos of GTAF.

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图 4 数据获取系统照片

Figure 4. Photo of data acquisition system.

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图 5 实验得到的能谱

Figure 5. Energy spectrum obtained from experiment.

DownLoad: Full-Size Img PowerPoint

图 6 实验记录的晶体多重数

Figure 6. Experimentally recorded crystal multiplicity.

DownLoad: Full-Size Img PowerPoint

图 7 PSD-ADC channel二维谱

Figure 7. Two-dimensional spectrum of PSD-ADC channel.

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图 8 不同吸收片的条件下¹⁹⁷Au样品和各本底的TOF谱

Figure 8. TOF spectra of ¹⁹⁷Au samples under different absorber conditions and various backgrounds.

DownLoad: Full-Size Img PowerPoint

图 9 ¹⁹⁷Au共振曲线的实验值和理论值对比

Figure 9. Comparison between experimental values and theoretical values of ¹⁹⁷Au resonance curves.

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图 10 SAMMY拟合结果与实验数据对比图

Figure 10. Comparison of SAMMY fitting results and experimental data.

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表 1 实验样品参数

Table 1. Characteristics of experimental samples.

样品	直径/mm	厚度/mm	密度/(g⋅cm^–3)
¹⁹⁷Au	40	0.2	19.32
^natC	40	1.0	2.25

DownLoad: CSV

表 2 ¹⁹⁷Au自旋组信息

Table 2. Information of spin groups of ¹⁹⁷Au.

自旋组	基态自旋	中子自旋	总自旋角动量	轨道角动量	总角动量
1	+1.5	–0.5	+1	0	+1
2	+1.5	+0.5	+2	0	+2

DownLoad: CSV

表 3 SAMMY拟合的共振参数与ENDF/B-VIII.0对比

Table 3. Comparison of resonance parameters fitted by SAMMY and ENDF/B-VIII.0.

能量/eV		中子共振宽度/meV		伽马共振宽度/meV
拟合值	ENDF/B-VIII.0	拟合值	ENDF/B-VIII.0	拟合值	ENDF/B-VIII.0
4.93709	4.8997	17.6345	1.496	121.9605	121.4
46.5717	46.669	0.20511	0.22	190.5456	127
57.9329	58.078	4.99505	0.431	175.7	113
59.9007	60.2914	137.619	7.066	115.4935	118
78.2631	78.5	34.3565	17	125.296	124

DownLoad: CSV

map

[1]	Palmiotti G, Salvatores M, Assawaroongruengchot M 2009 International Conference on Fast Reactors and Related Fuel Cycles Kyoto, Japan, December 7–11, 2009 pINL/CON-09-17363
[2]	Arnould M, Katsuma M 2008 International Conference on Nuclear Data for Science and Technology Nice, France, April 22–27, 2008 p5
[3]	Kompe D 1969 Nucl. Phys. 133 513 Google Scholar
[4]	Wisshak K, Kappeler F, Reffo G 1984 Nucl. Sci. Eng. 88 594 Google Scholar
[5]	Terada K, Katabuchi T, Mizumoto M, Arai T, Saito T, Igashira M, Hirose K, Nakamura S, Kimura A, Harada H, Hori J, Kino K, Kiyanagi Y 2015 Prog. Nucl. Energy 82 118 Google Scholar
[6]	Kobayashi K, Lee S, Yamamoto S 2004 Nucl. Sci. Eng. 146 209 Google Scholar
[7]	Mingrone F, Massimi C, Altstadt S 2014 International Conference on Nuclear Data for Science and Technology New York, USA, March 4–8, 2013 18
[8]	Guber K H, Derrien H, Leal L C, Arbanas G, Wiarda D, Koehler P E, Harvey A 2010 Phys. Rev. C 82 057601 Google Scholar
[9]	Wisshak K, Voss F, Kaeppeler F, Krticka M, Gallino R 2006 Phys. Rev. C 73 015802 Google Scholar
[10]	Mendoza E, Cano-Ott D, Altstadt S, et al. 2018 Phys. Rev. C 97 054616 Google Scholar
[11]	Mosby S, Bredeweg T A, Couture A, Jandel M, Kawano T, Ullmann J L, Henderson R A, Wu C Y 2018 Phys. Rev. C 97 041601 Google Scholar
[12]	石斌, 彭猛, 张奇玮, 贺国珠, 周祖英, 唐洪庆 2018 原子能科学技术 52 1537 Google Scholar Shi B, Peng M, Zhang Q W, He G Z, Zhou Z Y, Tang H Q 2018 At. Energy Sci. Technol. 52 1537 Google Scholar
[13]	唐靖宇, 安琪, 白怀勇等 2019 原子能科学技术 53 2012 Google Scholar Tang J Y, An Q, Bai H Y, et al. 2019 At. Energy Sci. Technol. 53 2012 Google Scholar
[14]	丁大钊, 叶春堂, 赵志祥1996 中子物理学——原理、方法与应用 (北京: 原子能出版社) 第387—389页 Ding D Z, Ye C T, Zhao Z X 1996 Neutron Physics-Principles, Methods, and Applications (Beijing: Atomic Energy Press) pp387–389
[15]	卢希庭等 2000 原子核物理 (北京: 原子能出版社) 第263—267页 Lu X T 2000 Nuclear Physics (Beijing: Atomic Energy Press) pp263–267
[16]	An Q, Bai H Y, Bao J, et al. 2017 J. Instrum. 12 7022 Google Scholar
[17]	Tang J Y, Fu S N, Jing H T, Tang H Q, Wei J, Xia H H 2010 Chin. Phys. C 34 121 Google Scholar
[18]	Jing H T, Tang J Y, Tang H Q, Xia H H, Liang T J, Zhou Z Y, Zhong Q P, Ruan X C 2010 Nucl. Instrum. Methods Phys. Res. , Sect. A 621 91 Google Scholar
[19]	唐靖宇, 敬罕涛, 夏海鸿, 唐洪庆, 张闯, 周祖英, 阮锡超, 张奇玮, 杨征 2013 原子能科学技术 47 1089 Google Scholar Tang J Y, Jing H T, Xia H H, Tang H Q, Zhang C, Zhou Z Y, Ruan X C, Zhang Q W, Yang Z 2013 At. Energy Sci. Technol. 47 1089 Google Scholar
[20]	任杰, 阮锡超, 唐洪庆, 葛智刚, 黄翰雄, 敬罕涛, 唐靖宇, 黄蔚玲 2014 核技术 37 100521 Google Scholar Ren J, Ruan X C, Tang H Q, Ge Z G, Huang H X, Jing H T, Tang J Y, Huang W L 2014 Nucl. Tech. 37 100521 Google Scholar
[21]	Chen Y H, Luan G Y, Bao J, et al. 2019 Eur. Phys. J. A 55 115 Google Scholar
[22]	张奇玮, 栾广源, 任杰等 2021 70 222801 Google Scholar Zhang Q W, Luan G Y, Ren J, et al. 2021 Acta Phys. Sin. 70 222801 Google Scholar
[23]	Heil M, Reifarth R, Fowler M M, et al. 2019 IEEE Trans. Nucl. Sci. 66 1095 Google Scholar
[24]	Wang Q, Cao P, Qi X, Yu T, Ji X, Xie L, An Q S 2018 Rev. Sci. Instrum. 89 013511 Google Scholar
[25]	张奇玮, 贺国珠, 黄兴, 程品晶, 阮锡超, 朱兴华 2016 原子能科学技术 50 536 Google Scholar Zhang Q W, He G Z, Huang X, Cheng P J, Ruan X C, Zhu X H 2016 At. Energy Sci. Technol. 50 536 Google Scholar
[26]	张奇玮, 贺国珠, 黄兴, 阮锡超, 李志宏, 朱兴华 2014 原子能科学技术 48 612 Google Scholar Zhang Q W, He G Z, Huang X, Ruan X C, Li Z H, Zhu X H 2014 At. Energy Sci. Technol. 48 612 Google Scholar
[27]	Fröhner F H 1980 Applied Neutron Resonance Theory (Karlsruhe: Kernforschungszentrum Karlsruhe GmbHP
[28]	Lane A M, Thomas R G 1958 Rev. Mod. Phys. 30 257 Google Scholar
[29]	Larson N M 2008 Updated User’s Guide for Sammy: Multilevel R-Matrix Fits to Neutron Data Using Bayes’ Equations ORNL/TM-9179/R8 ENDF-364/R2

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Neutron capture reaction cross-section data processing and resonance parameter analysis of ¹⁹⁷Au based on white light neutron source

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Corresponding author: Zhang Qi-Wei, zqwvictor@126.com ; Ruan Xi-Chao, xichao_ruan@126.com ;

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Neutron capture reaction cross-section data processing and resonance parameter analysis of 197Au based on white light neutron source

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Corresponding author: Zhang Qi-Wei, zqwvictor@126.com ; Ruan Xi-Chao, xichao_ruan@126.com ;

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Neutron capture reaction cross-section data processing and resonance parameter analysis of ¹⁹⁷Au based on white light neutron source