
6.1 FNAA: Fundamentals and Applications
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explosives a strong correlation exists between their O and N concentrations.
In addition to H, which is not seen readily with 14 MeV neutrons, Cisanother
element that is common to all explosives. A detection system that could quan-
titatively determine the C, N, O content of an interrogated material could assist
in identifying a hidden explosive. Among the various options for the C, N, O
identication, a pulsed fast/thermal neutron technique was chosen. e three
elements C, N, and O are identied through the characteristic γ-rays emitted
from the interaction of neutrons with the corresponding nuclei. ...