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- W4308463469 abstract "Transmission radiography is a well-established nondestructive examination technique with widespread application to fields ranging from medicine to security. Traditionally, inspection is performed using a single particle type (such as x-rays). However, the information available using a single probe for traditional radiography is limited. The present work evaluates material discrimination via transmission radiography using the attenuation ratio of monoenergetic gamma rays to a broad spectrum of fast neutrons. The method was assessed using an 241Am/Be radioisotope source that provides both 4.4 MeV gamma rays and a spectrum of fast neutrons up to 12 MeV. A total of 14 object configurations were measured: seven different materials each with two thicknesses (2.5 cm and 5!cm). The ability to distinguish materials was evaluated and shows more significant variation among atomic numbers than for high-energy x-rays alone, making it easier to distinguish between classes such as low-, mid-, and high-Z materials. These results suggest that superior material discrimination is also possible using a combination of monoenergetic gamma rays and broad-spectrum fast neutrons from a variety of nuclear reactions, such as 11B(d,nγ)12C, that could be implemented in future inspection systems." @default.
- W4308463469 created "2022-11-12" @default.
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- W4308463469 date "2023-02-01" @default.
- W4308463469 modified "2023-09-30" @default.
- W4308463469 title "Fast-neutron/gamma-ray radiography using a broad-energy neutron source" @default.
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- W4308463469 doi "https://doi.org/10.1016/j.nima.2022.167701" @default.
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