High Power Laser and Particle Beams, Volume. 36, Issue 12, 126003(2024)
Neutron spectrum unfolding based on the detection of Bonner multi-sphere spectrometer
Figures & Tables(9)
Fig. 1. Simulation model diagram (sectional view, ① concrete, ② air, ③ Bonner ball, ④ neutron source)
Fig. 2. Model diagram of Bonner spectrometer (sectional view, ① polyethylene layer, ② aluminum shell, ③ LiI scintillator)
Fig. 5. The results of MAXED spectral decomposition under different prefabricated spectra
Table 1. Composition of material elements
View tableView in ArticleTable 1. Composition of material elements
name density/(g/cm3) element (weight fraction) concrete 2.30 H(2.2%), C(0.3%), O(57.5%), Na(1.5%), Mg(0.1%), Al(2%), Si(30.5%), K(1%), Ca(4.3%), Fe(0.6%) polythene 0.95 C(86%), H(14%) Al shell 2.70 Al(100%) LiI scintillator 3.84 6Li(5%), I(95%) air 1.20×10−3 C(0.01%), N(76.52%), O(23.47%)
Table 2. The proportion of reliable results under different random particle numbers
View tableView in ArticleTable 2. The proportion of reliable results under different random particle numbers
random particle population percentage of credible results/% 2.2×107 34.92 2.2×108 52.38 3.0×108 55.56 5.0×108 60.32 1.0×109 74.60
Table 3.
χ 2-PDF values of GRAVEL solution results under different iterationsView tableView in ArticleTable 3.
χ 2-PDF values of GRAVEL solution results under different iterationsiterations χ2-PDF 50 1.34 100 1.18 150 1.08 207 0.99
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Shuo Zhang, Jieqing Fan, Fang Zhang, Qiang Zhao, Jianhong Hao, Zhiwei Dong. Neutron spectrum unfolding based on the detection of Bonner multi-sphere spectrometer[J]. High Power Laser and Particle Beams, 2024, 36(12): 126003
Paper Information
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Received: May. 11, 2024
Accepted: Sep. 14, 2024
Published Online: Jan. 15, 2025
The Author Email: Zhang Fang (zhang_fang@iapcm.ac.cn)
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