Material identification using dual particle interrogation
In this paper, the application of bi-modal analysis, which fuses the X-ray attenuation and photoneutron attenuation together to enhance the capability of material identification, is presented. Within a 7 MeV e-LINAC system, both X-rays and photoneutrons, which are produced by the ( γ, n) reaction of...
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Published in | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 954; p. 161827 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
21.02.2020
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Subjects | |
Online Access | Get full text |
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Summary: | In this paper, the application of bi-modal analysis, which fuses the X-ray attenuation and photoneutron attenuation together to enhance the capability of material identification, is presented. Within a 7 MeV e-LINAC system, both X-rays and photoneutrons, which are produced by the ( γ, n) reaction of 9Be nuclei with X-rays, are delivered simultaneously. A moderation process is introduced to help retard the measurement time of photoneutrons to avoid the X-ray pulse’s interference to the neutron detector. A V(t) factor is derived from the attenuation coefficients of X-rays and photoneutrons to separate different materials. The hydrogen-wealthy materials, organic materials, low-Z, middle-Z and high-Z metals could be effectively discriminated. The preliminary bi-modal imaging result, realized with a neutron detector array of 32 3He counters and an X-ray detector array, is also presented. |
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ISSN: | 0168-9002 1872-9576 |
DOI: | 10.1016/j.nima.2019.01.053 |