Fast neutron tomography with real-time pulse-shape discrimination in organic scintillation detectors
Fast neutron tomography with real-time pulse-shape discrimination in organic scintillation detectors
复制标题
有机闪烁探测器中具有实时脉冲形状辨别功能的快速中子断层扫描
DOI:
10.1016/j.nima.2016.07.044
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Joyce M
中科院分区:
文献类型:
--
作者:
Joyce M
A fast neutron tomography system based on the use of real-time pulse-shape discrimination in 7 organic liquid scintillation detectors is described. The system has been tested with a californium-252 source of dose rate 163 μSv/h at 1 m and neutron emission rate of 1.5×107per second into 4πand a maximum acquisition time of 2 h, to characterize two 100×100×100 mm3concrete samples. The first of these was a solid sample and the second has a vertical, cylindrical void. The experimental data, supported by simulations with both Monte Carlo methods and MATLAB®, indicate that the presence of the internal cylindrical void, corners and inhomogeneities in the samples can be discerned. The potential for fast neutron assay of this type with the capability to probe hydrogenous features in large low-Z samples is discussed. Neutron tomography of bulk porous samples is achieved that combines effective penetration not possible with thermal neutrons in the absence of beam hardening.
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