Cross section measurement of neutron capture reaction based on back-streaming white neutron source at China spallation neutron source

Zhang Qi-Wei; Luan Guang-Yuan; Ren Jie; Ruan Xi-Chao; He Guo-Zhu; Bao Jie; Sun Qi; Huang Han-Xiong; Wang Zhao-Hui; 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.70.20210742

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.

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 (CAS), Beijing 100049, China
3.
Spallation Neutron Source Science Center, Dongguan 523803, China
4.
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, China
5.
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: Luan Guang-Yuan, lgyciae@hotmail.com

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11605294, 11675268, 11790321, 11975317) and the National Key Research and Development Program of China (Grant No. 2016YFA0401601).

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References

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[2]	Palmiotti G, Salvatores M, Assawaroongruengchot M 2009 International Conference on Fast Reactors and Related Fuel Cycles Kyoto, Japan, Dec. 07–11, 2009
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[28]	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 70 Zhang Q W, He G Z, Huang X, Ruan X C, Li Z H, Zhu X H 2014 Atomic Energy Science and Technology 48 70
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Cited By

图 1 中子俘获反应测量原理

Figure 1. Measurement principle of neutron capture reaction.

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图 2 CSNS反角白光中子源布局

Figure 2. Arrangement of Back-n at CSNS.

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图 3 实验测得的实验厅2的中子束流能谱

Figure 3. Experimental result of neutron energy spectrum at End-station 2.

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图 4 中子束斑剖面及其在水平和垂直方向的分布

Figure 4. Neutron beam profile and distribution in horizontal and vertical directions.

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图 5 (a) BaF₂探测器单元; (b) GTAF-II谱仪

Figure 5. (a) BaF₂ detector unit; (b) GTAF-II spectrometer.

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图 6 BaF₂探测器单元探测到的信号波形

Figure 6. Signal waveform detected by BaF₂ detector.

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图 7 GTAF-II谱仪电子学电路图

Figure 7. Electronic diagram of GTAF-II spectrometer.

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图 8 过阈触发原理示意图

Figure 8. Schematic diagram of over threshold trigger.

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图 9 (a)飞行时间谱的比较; (b)加和能谱的比较

Figure 9. (a) Comparison of time-of-flight spectrum; (b) comparison of sum energy spectrum.

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图 10 晶体多重数的比较

Figure 10. Comparison of crystal multiplicity.

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图 11 ¹⁹⁷Au中子俘获反应截面的实验结果

Figure 11. Experimental results of neutron capture cross section of ¹⁹⁷Au.

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表 1 不同准直器孔径下实验厅2中子束斑尺寸的模拟结果

Table 1. Simulation result of neutron beam spot size at End-station 2 with different collimator aperture.

中子束斑
尺寸中子开关
孔径准直器1#
孔径准直器2#
孔径

ϕ30 mm ϕ12 mm ϕ15 mm ϕ40 mm
ϕ60 mm ϕ50 mm ϕ50 mm ϕ58 mm
90 mm × 90 mm 78 mm × 62 mm 76 mm × 76 mm 90 mm × 90 mm

DownLoad: CSV

表 2 实验样品参数

Table 2. The characteristics of experimental samples.

样品密度/(g·cm^–3) 直径/mm 厚度/mm 纯度/%

¹⁹⁷Au 19.32 25 0.2 99.99
^natC 2.25 25 1 99.99

DownLoad: CSV

[1]	Arnould M, Katsuma M 2008 International Conference on Nuclear Data for Science and Technology Nice, France, April 22–27, 2007 7
[2]	Palmiotti G, Salvatores M, Assawaroongruengchot M 2009 International Conference on Fast Reactors and Related Fuel Cycles Kyoto, Japan, Dec. 07–11, 2009
[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, et al. 2015 Progress in Nuclear Energy 82 118 Google Scholar
[6]	Kobayashi K, Lee S, Yamamoto S 2004 Nucl. Sci. Eng. 146 209 Google Scholar
[7]	Lee J, Hori J I, Nakajima K, Sano T, Lee S 2017 J. Nucl. Sci. Tech. 54 1046 Google Scholar
[8]	Kim H I, Paradela C, Sirakov I, et al. 2016 Eur. Phys. J. A 52 170 Google Scholar
[9]	Mingrone F, Massimi C, Altstadt S, et al. 2014 International Conference on Nuclear Data for Science and Technology NewYork, USA, Mar. 4–8, 2013 18
[10]	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
[11]	Ren J, Ruan X, Bao J, et al. 2019 Radiation Detection Technology and Methods 3 52 Google Scholar
[12]	Wisshak K, Voss F, Kaeppeler F, Krticka M, Gallino R 2006 Phys. Rev. C 73 015802 Google Scholar
[13]	Mendoza E, Cano-Ott D, Altstadt S, et al. 2018 Phys. Rev. C 97 054616 Google Scholar
[14]	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
[15]	Zhong Q P, Zhou Z Y, Tang H Q, et al. 2008 Chin. Phys. C 32 102
[16]	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 Atomic Energy Science and Technology 52 1537 Google Scholar
[17]	张奇玮, 贺国珠, 栾广源, 程品晶, 阮锡超, 朱兴华 2021 强激光与粒子束 33 0440 Zhang Q W, He G Z, Luan G Y, Cheng P J, Ruan X C, Zhu X H 2021 Power Laser and Particle Beams 33 0440
[18]	唐靖宇, 安琪, 白怀勇, 等 2019 原子能科学技术 53 2012 Tang J Y, An Q, Bai H Y, et al. 2019 Atomic Energy Science and Technology 53 2012 (in Chinese)
[19]	An Q, Bai H Y, Bao J, et al. 2017 Journal of Instrumentation 12 7022
[20]	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
[21]	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. Instr. Meth. A 621 91 Google Scholar
[22]	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 Atomic Energy Science and Technology 47 1089 Google Scholar
[23]	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 110521 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 110521
[24]	Chen Y H, Luan G Y, Bao J, et al. 2019 Eur. Phys. J. A 55 115 Google Scholar
[25]	鲍杰, 陈永浩, 张显鹏, 等 2019 物理学报 68 080101 Google Scholar Bao J, Chen Y H, Zhang X P, et al. 2019 Acta Phys. Sin. 68 080101 Google Scholar
[26]	韩长材, 欧阳晓平, 张显鹏, 宋朝晖, 鲍杰, 严维鹏 2020 原子能科学技术 54 385 Google Scholar Han C C, Ouyang X P, Zhang X P, Song Z H, Bao J, Yan W P 2020 Atomic Energy Science and Technology 54 385 Google Scholar
[27]	马霄云, 仲启平, 周祖英, 等 2009 原子能科学技术 43 180 Ma X Y, Zhong Q P, Zhou Z Y, et al. 2009 Atomic Energy Science and Technology 43 180
[28]	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 70 Zhang Q W, He G Z, Huang X, Ruan X C, Li Z H, Zhu X H 2014 Atomic Energy Science and Technology 48 70
[29]	Yu T, Cao P, Ji X Y, et al. 2019 IEEE Transactions on Nuclear Science 66 1095 Google Scholar
[30]	Wang Q, Cao P, Qi X, et al. 2018 Review of Scientific Instruments 89 013511 Google Scholar
[31]	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 Atomic Energy Science and Technology 50 536 Google Scholar
[32]	张奇玮, 栾广源, 贺国珠, 程品晶, 阮锡超, 朱兴华 2020 原子核物理评论 37 771 Google Scholar Zhang Q W, Luan G Y, He G Z, Cheng P J, Ruan X C, Zhu X H 2020 Nuclear Physics Review 37 771 Google Scholar

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