Monte Carlo simulation of prompt γ-ray spectra from depleted uranium under D-T neutron irradiation and electron recoil spectra in a liquid scintillator detector

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Jian-Guo Qin, Cai-Feng Lai, Rong Liu, Tong-Hua Zhu, Xin-Wei Zhang and Bang-Jiao Ye. Monte Carlo simulation of prompt γ-ray spectra from depleted uranium under D-T neutron irradiation and electron recoil spectra in a liquid scintillator detector[J]. Chinese Physics C, 2016, 40(3): 036201. doi: 10.1088/1674-1137/40/3/036201
Jian-Guo Qin, Cai-Feng Lai, Rong Liu, Tong-Hua Zhu, Xin-Wei Zhang and Bang-Jiao Ye. Monte Carlo simulation of prompt γ-ray spectra from depleted uranium under D-T neutron irradiation and electron recoil spectra in a liquid scintillator detector[J]. Chinese Physics C, 2016, 40(3): 036201.  doi: 10.1088/1674-1137/40/3/036201 shu
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Received: 2015-04-02
Revised: 2015-09-18
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    Supported by the National Natural Science Foundation of China (91226104) and National Special Magnetic Confinement Fusion Energy Research, China (2015GB108001)

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Monte Carlo simulation of prompt γ-ray spectra from depleted uranium under D-T neutron irradiation and electron recoil spectra in a liquid scintillator detector

    Corresponding author: Jian-Guo Qin,
  • 1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, P.O.Box 213, Mianyang 621900, China
  • 3. Graduate School, China Academy of Engineering Physics, Mianyang 621900, China
  • 4.  Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, P.O.Box 213, Mianyang 621900, China
  • 5.  Institute of Applied Physics and Computational Mathematics, P.O.Box 8009, Beijing 100088, China
  • 6.  Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
Fund Project:  Supported by the National Natural Science Foundation of China (91226104) and National Special Magnetic Confinement Fusion Energy Research, China (2015GB108001)

Abstract: To overcome the problem of inefficient computing time and unreliable results in MCNP5 calculation, a two-step method is adopted to calculate the energy deposition of prompt γ-rays in detectors for depleted uranium spherical shells under D-T neutron irradiation. In the first step, the γ-ray spectrum for energy below 7 MeV is calculated by MCNP5 code; secondly, the electron recoil spectrum in a BC501A liquid scintillator detector is simulated based on EGSnrc Monte Carlo Code with the γ-ray spectrum from the first step as input. The comparison of calculated results with experimental ones shows that the simulations agree well with experiment in the energy region 0.4-3 MeV for the prompt γ-ray spectrum and below 4 MeVee for the electron recoil spectrum. The reliability of the two-step method in this work is validated.

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