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Acta Physica Sinica, Volume. 69, Issue 17, 172901-1(2020)

In-beam γ-rays of back-streaming white neutron source at China Spallation Neutron Source

Jie Ren1, Xi-Chao Ruan1, Yong-Hao Chen2,3, Wei Jiang2,3, Jie Bao1、*, Guang-Yuan Luan1, Qi-Wei Zhang1, Han-Xiong Huang1, Zhao-Hui Wang1, Qi An4,5, Huai-Yong Bai6, Yu Bao2,3, Ping Cao4,5, Hao-Lei Chen4,5, Qi-Ping Chen7, Yu-Kai Chen2,3, Zhen Chen4,5, Zeng-Qi Cui6, Rui-Rui Fan2,3,4, Chang-Qing Feng4,5, Ke-Qing Gao2,3, Min-Hao Gu2,4, Chang-Cai Han8, Zi-Jie Han7, Guo-Zhu He1, Yong-Cheng He2,3, Yang Hong2,3,9, Wei-Ling Huang2,3, Xi-Ru Huang4,5, Xiao-Lu Ji2,4, Xu-Yang Ji0,4, Hao-Yu Jiang6, Zhi-Jie Jiang4,5, Han-Tao Jing2,3, Ling Kang2,3, Ming-Tao Kang2,3, Bo Li2,3, Chao Li4,5, Jia-Wen Li0,4, Lun Li2,3, Qiang Li2,3, Xiao Li2,3, Yang Li2,3, Rong Liu7, Shu-Bin Liu4,5, Xing-Yan Liu7, Qi-Li Mu2,3, Chang-Jun Ning2,3, Bin-Bin Qi4,5, Zhi-Zhou Ren7, Ying-Peng Song2,3, Zhao-Hui Song8, Hong Sun2,3, Kang Sun2,3,9, Xiao-Yang Sun2,3,9, Zhi-Jia Sun2,3,4, Zhi-Xin Tan2,3, Hong-Qing Tang1, Jing-Yu Tang2,3, Xin-Yi Tang4,5, Bin-Bin Tian2,3, Li-Jiao Wang2,3,9, Peng-Cheng Wang2,3, Qi Wang1, Tao-Feng Wang0, Jie Wen7, Zhong-Wei Wen7, Qing-Biao Wu2,3, Xiao-Guang Wu1, Xuan Wu2,3, Li-Kun Xie0,4, Yi-Wei Yang7, Han Yi2,3, Li Yu2,3, Tao Yu4,5, Yong-Ji Yu2,3, Guo-Hui Zhang6, Lin-Hao Zhang2,3,9, Xian-Peng Zhang8, Yu-Liang Zhang2,3, Zhi-Yong Zhang4,5, Yu-Bin Zhao2,3, Lu-Ping Zhou2,3,9, Zu-Ying Zhou1, Dan-Yang Zhu4,5, Ke-Jun Zhu2,4,9, and Peng Zhu2,3
Author Affiliations
  • 0Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
  • 0School of Physics, Beihang University, Beijing 100083, China
  • 1Key Laboratory of Nuclear Data, China Institute of Atomic Energy, Beijing 102413, China
  • 2Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 3Spallation Neutron Source Science Center, Dongguan 523803, China
  • 4State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China
  • 5Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 6State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
  • 7Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • 8Northwest Institute of Nuclear Technology, Xi’an 710024, China
  • 9University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
    Equations (1)
    References (20)
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    Figures & Tables(11)
    Layout of the CSNS Back-n.

    Fig. 1. Layout of the CSNS Back-n.

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    Geometric model of the spallation target in Geant 4 code.

    Fig. 2. Geometric model of the spallation target in Geant 4 code.

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    The simulation results of the in-beam gamma rays: (a) The energy spectrum; (b) the time structure.

    Fig. 3. The simulation results of the in-beam gamma rays: (a) The energy spectrum; (b) the time structure.

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    The energy spectra of the in-beam gamma rays: (a) The energy spectra of γ-flash and the consecutive gamma rays; (b) the energy spectra of the consecutive gamma rays at different time.

    Fig. 4. The energy spectra of the in-beam gamma rays: (a) The energy spectra of γ-flash and the consecutive gamma rays; (b) the energy spectra of the consecutive gamma rays at different time.

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    (a) The experimental setup of the direct measurement; (b) the structure of the EJ-420 scintillator.

    Fig. 5. (a) The experimental setup of the direct measurement; (b) the structure of the EJ-420 scintillator.

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    The waveforms of EJ-420: Gamma ray’s waveform and neutron’s waveform.

    Fig. 6. The waveforms of EJ-420: Gamma ray’s waveform and neutron’s waveform.

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    (a) The pulse shape discrimination result of neutron and gamma rays; (b) time-of-flight spectrum of the EJ-420.

    Fig. 7. (a) The pulse shape discrimination result of neutron and gamma rays; (b) time-of-flight spectrum of the EJ-420.

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    (a) The experimental setup of the indirect measurement; (b) the geometric model in Geant 4 code.

    Fig. 8. (a) The experimental setup of the indirect measurement; (b) the geometric model in Geant 4 code.

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    The TOF spectrum of indirect measurement (black solid line) and the Geant 4 simulated TOF spectrum (red solid line) and the in-beam γ-rays (blue dashed line).

    Fig. 9. The TOF spectrum of indirect measurement (black solid line) and the Geant 4 simulated TOF spectrum (red solid line) and the in-beam γ-rays (blue dashed line).

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    The comparison of the TOF spectra of the in-beam gamma rays.

    Fig. 10. The comparison of the TOF spectra of the in-beam gamma rays.

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    • Table 1. Physical models in the Geant 4 code.

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      Table 1. Physical models in the Geant 4 code.

      粒子类型能量区间/MeV物理模型
      质子< 1600G4HadronModel
      G4CascadeInterface
      中子< 20.0G4NeutronHPModel (ENDF/B-VII.1)
      > 20.0G4HadronModel
      伽马> 0G4RayleighScattering
      G4PhotoElectricEffect
      G4ComptonScattering
      G4GammaConversion
      电子> 0G4eMultipleScattering
      G4eIonisation
      G4eBremsstrahlung
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    Jie Ren, Xi-Chao Ruan, Yong-Hao Chen, Wei Jiang, Jie Bao, Guang-Yuan Luan, Qi-Wei Zhang, Han-Xiong Huang, Zhao-Hui Wang, Qi An, Huai-Yong Bai, Yu Bao, Ping Cao, Hao-Lei Chen, Qi-Ping Chen, Yu-Kai Chen, Zhen Chen, Zeng-Qi Cui, Rui-Rui Fan, Chang-Qing Feng, Ke-Qing Gao, Min-Hao Gu, Chang-Cai Han, Zi-Jie Han, Guo-Zhu He, Yong-Cheng He, Yang Hong, Wei-Ling Huang, Xi-Ru Huang, Xiao-Lu Ji, Xu-Yang Ji, Hao-Yu Jiang, Zhi-Jie Jiang, Han-Tao Jing, Ling Kang, Ming-Tao Kang, Bo Li, Chao Li, Jia-Wen Li, Lun Li, Qiang Li, Xiao Li, Yang Li, Rong Liu, Shu-Bin Liu, Xing-Yan Liu, Qi-Li Mu, Chang-Jun Ning, Bin-Bin Qi, Zhi-Zhou Ren, Ying-Peng Song, Zhao-Hui Song, Hong Sun, Kang Sun, Xiao-Yang Sun, Zhi-Jia Sun, Zhi-Xin Tan, Hong-Qing Tang, Jing-Yu Tang, Xin-Yi Tang, Bin-Bin Tian, Li-Jiao Wang, Peng-Cheng Wang, Qi Wang, Tao-Feng Wang, Jie Wen, Zhong-Wei Wen, Qing-Biao Wu, Xiao-Guang Wu, Xuan Wu, Li-Kun Xie, Yi-Wei Yang, Han Yi, Li Yu, Tao Yu, Yong-Ji Yu, Guo-Hui Zhang, Lin-Hao Zhang, Xian-Peng Zhang, Yu-Liang Zhang, Zhi-Yong Zhang, Yu-Bin Zhao, Lu-Ping Zhou, Zu-Ying Zhou, Dan-Yang Zhu, Ke-Jun Zhu, Peng Zhu. In-beam γ-rays of back-streaming white neutron source at China Spallation Neutron Source[J]. Acta Physica Sinica, 2020, 69(17): 172901-1

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    Paper Information

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    Received: May. 13, 2020

    Accepted: --

    Published Online: Jan. 4, 2021

    The Author Email:

    DOI:10.7498/aps.69.20200718

    Topics

    Nuclear physics
    Particles and fields
    Particle and nuclear astrophysics and cosmology