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- W2922859791 abstract "The Tagged Neutron Method (TNM) widely used in recent years has been applied to detect explosives to fight against terrorism. Because of the existence of a high-density (about 2.5 g/cm3) dry concrete wall, neutrons are moderated and γ-ray are attenuated and absorbed, which causes great interference to the detection of hidden explosives. A movable device has been designed for detection of explosive embedded in a concrete wall by using TNM technique. The experimental set-up was modeled and optimized with the MCNP5 Monte Carlo code. The γ-ray energy spectrum of graphite sample was firstly collected to calibrate the detection system and verify the validity of the MCNP5 model. Then γ-ray energy spectra of different samples under different situation are accumulated and compared with the simulation results. The samples of TNT and ammonium nitrate surrogate were placed behind a concrete wall with thickness of 10 cm, 15 cm and 20 cm, respectively. The comparison of the MCNP simulation results with experiment is in a good agreement. The results obtained provide a good reference for the subsequent data acquisition and analysis by using this model." @default.
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- W2922859791 date "2019-06-01" @default.
- W2922859791 modified "2023-10-18" @default.
- W2922859791 title "Experiment and MCNP simulation of a portable tagged neutron inspection system for detection of explosives in a concrete wall" @default.
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- W2922859791 doi "https://doi.org/10.1016/j.nima.2019.03.069" @default.
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