9.4 Neutron Radiography
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equipment. Neutron radiography is similar to taking an x-ray, but neutron
radiographs give additional information not available from traditional x-rays.
In particular, neutrons have the ability to pass through thick layers of metal,
relatively unaected, and give information about low density, low atomic num-
ber materials inside an object.
Fast neutron imaging oers the potential to be a powerful nondestructive
inspection tool for evaluating the integrity of thick sealed targets (Dietrich
etal. 1997) and for the interrogation of air cargo containers (Sowerby et al.
2009). is is particularly true in cases where one is interested in detecting
voids, cracks, or other defects in low-Z materials (e.g., plastics, cera ...