Depending on the neutron energy used, neutron radiography can be generally categorized as fast and thermal neutron radiography. Fast neutron radiography (FNR) with neutron energy more than 1 MeV opens up a new range of possibilities for a non-destructive examination when the inspected object is thick or dense. Other traditional techniques, such as X-ray, gamma ray and thermal neutron radiography, do not meet penetration capabilities of FNR in this area. Because of these distinctive features, this technique is used in different industrial applications such as security (cargo investigation for contraband such as narcotics, explosives and illicit drugs), gas/liquid flow and mixing and radiography and tomography of encapsulated heavy shielded low Z compound materials. The FNR images are produced directly during exposure as neutrons create recoil protons, which activate a scintillator screen, allowing images to be collected with a computer-controlled charge-coupled device camera. Finally, the picture can be saved on a computer for image processing. The aim of this research was to set up a portable FN R system and to test it for use in non-destructive testing of different composite materials. Experiments were carried out by using a fast portative neutron generator Thermo Scientific MP 320.
If the inline PDF is not rendering correctly, you can download the PDF file here.
1. de Haan, V. O., van der Hagen, T. H. J. J., Federov, A., Van Veen, A., & de Leege, P. F. A. (2005). Conceptual design of a novel high-frame-rate fast-neutron radiography facility. Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equ., 539, 321–334. doi: 10.1016/j.nima.2004.10.007.
2. Ferreira, F. J. O., Silva, A. X., & Crispim, V. R. (2010). Electronic imaging system for neutron radiography at a low power research reactor. Radiat. Meas., 45, 806–809. doi: 10.1016/j.radmeas.2010.02.013.
4. Hausladen, P. A., Bingham, P. R., Neal, J. S., Mullens, J. A., & Mihalczo, J. T. (2007). Portable fast-neutron radiography with the nuclear materials identification system for fissile material transfers. Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms261, 387–390. doi: 10.1016/j.nimb.2007.04.206.
5. Fujine, S., Yoneda, K., Yoshii, K., Kamata, M., Tamaki, M., Ohkubo, K., Ikeda, Y., & Kobayashi, H. (1999). Development of imaging techniques for fast neutron radiography in Japan. Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equ.424, 190–199. doi: 10.1016/S0168-9002(98)01326-6.
6. Kim, K. H., Klan, R. T., & Raju, B. B. (1999). Fast neutron radiography for composite materials evaluation and testing. Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equ.422, 929–932. doi: 10.1016/S0168-9002(98)01048-1.
7. Popov, V., Degtiarenko, P., & Musatov, I. (2011). New detector for use in fast neutron radiography. J. Instrum., 6, (13pp.). doi: 10.1088/1748-0221/6/01/C01029.
8. Reeder, P. L., Peurrung, A. J., Hansen, R. R., & Stromswold, D. C. (1999). Detection of fast neutrons in a plastic scintillator using digital pulse processing to reject gammas. Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equ.422, 84–88. doi: 10.1016/S0168-9002(98)01068-7.
9. Gongyin, Chen. (2001). Fast neutron resonance radiography for elemental imaging: Theory and applications. Unpublished Ph.D. Thesis, Massachusetts Institute of Technology.
10. International Atomic Energy Agency. (2008). Neutron imaging a non-destructive tool for materials testing. Report of a coordinated research project. Vienna: IAEA. (IAEA-TECDOC-1604). doi: 10.2478/nuka-2019-0013