6.3 Process Control of Industrial Production Processes
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and quality. In addition to other physical and chemical methods, NAA—being
independent of chemical bond—can also be used for continuous analysis. e
most frequent elds of application are the on-stream analysis of solutions and
the analysis of solid substances on conveyer belts. Continuous neutron activa-
tion analysis (CNAA) has been reviewed by Kliment and Tölgyessy (2007). e
activity of the material measured by the detector depends on the nuclear prop-
erties of the elements of the sample, the neutron ux, the ow rate, the layer
thickness, the geometry of the arrangement, etc.
Industrial applications of neutron methods include characterization of
coal (Belbot etal. 1999; Sowerby ...