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Chemical elements determined by X ray fluorescence (XRF) and
neutron activation analysis (NAA).
The techniques also offer several advantages such as shorter analysis times and have no requirement for the separation of thorium from the sample matrix over the more traditional radiometric methods e.g., alpha spectro- metry, gamma spectrometry and
neutron activation analysis in the measurement of thorium [85].
The analyzer uses prompt gamma
neutron activation analysis (PGNAA) technology, a method based in nuclear physics, to perform a real-time composite analysis on streams of shredded ferrous scrap.
Comparative bullet lead analysis was developed in the early 1960s by researchers at General Atomic (now General Activation Analysis, Incorporated, Encinitas, California) under a federal grant to develop uses for
neutron activation analysis (NAA).
The members of The Review Committee include Thomas Fahidy, FCIC, Associate Dean for Graduate Studies and Research at the University of Waterloo Faculty of Engineering, Sheldon Landsberger, Director of the
Neutron Activation Analysis Facility at the University of Illinois Department of Nuclear Engineering, Stewart McIntyre, MCIC, Director of the Surface Science Laboratory at the University of Western Ontario and, Chair of the Commit, David Minns, MCIC, CSChE Director representing the Environment Division.
Somewhat more useful for identifying ceramic exchange patterns are the results of
neutron activation analysis, which show samples from Hamrin and lower Diyala sites clustered far distant from the Tepe Farukhabad (Deh Luran plain) control group, implying ceramic interchange between the Hamrin and lower Diyala sites.
The final popular method of inclusion sampling is a grab sampling technique based on nuclear principles and is known as the fast
neutron activation analysis (FNAA).
Daniel Pflaum of Cincinnati-based Gamma-Tech LLC is sole distributor of a bulk scrap analyzer manufactured by Thermo Gamma-Metrics, a wholly owned subsidiary of Thermo Electron, Waltham, Mass., that uses prompt gamma
neutron activation analysis (PGNAA) technology.