| NUCLEAR PHYSICS |
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Simulation of Suppression of Gamma Sensitivity of 'Fission Electron-Collection' Neutron Detector |
| Dong Wang1, Chuan-Fei Zhang2**, Bo-Jun Li1**, Yi-Ping Cai1, Xue-Bin Zhu1, Fen-Ni Si1, Zhi-Guo Xi1 |
1Institute of Nuclear Physics and Chemistry, Mianyang 621900
2China Academy of Engineering Physics, Mianyang 621900
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| Cite this article: |
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Dong Wang, Chuan-Fei Zhang, Bo-Jun Li et al 2016 Chin. Phys. Lett. 33 052901 |
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Abstract The fission electron-collection neutron detector (FECND) is a current-type neutron detector. Based on the analysis of the generation process of the gamma signals of the FECND, a mechanism utilizing symmetrical structure is proposed and discussed to suppress the gamma signals. According to this mechanism, the electrons generated from the gamma rays can be well compensated for by the adjustment of the electrodes' thickness and distance. In this study, based on the Monte–Carlo simulation of the gamma signals of the FECND, the varying patterns are obtained between the gamma signals and the detector parameter settings. As indicated by the simulation results, the gamma electrons can be compensated for completely by simply adjusting the coated electrode substrate thickness and distance. Moreover, with a proposed optimal parameter setting, the gamma sensitivity can be as low as 3.39$\times$10$^{-23}$ C$\cdot$cm$^{2}$, while the signal-to-noise ratio can be higher than 200:1. The compensation results of the $\gamma$-rays in the FECND will be slightly affected by the manufacturing error or the assembly error.
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Received: 08 November 2015
Published: 31 May 2016
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| PACS: |
29.40.-n
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(Radiation detectors)
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24.10.Lx
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(Monte Carlo simulations (including hadron and parton cascades and string breaking models))
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28.41.Rc
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(Instrumentation)
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