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Title: Matrix effects in compositional analysis of bulk materials by PGNAA (prompt gamma/neutron activation analysis). Final report

This feasibility study has identified and evaluated the influence of important matrix effects which arise in the commercial application of prompt gamma/neutron activation analysis (PGNAA) methods to bulk-coal analysis as follows: neutron moderation and absorption changes; gamma-ray attenuation in the sample; sample density and volume changes. The neutron-induced capture gamma spectra were found to vary in a similar, predictable manner for all neutron absorbers found in coal such as hydrogen, boron, nitrogen, chlorine, and sulfur. Three different models have been proposed from this study to analyze coal by PGNAA methods and account for the significant matrix effects arising from hydrogen variation and other system perturbations.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
6421922
Report Number(s):
PB-87-160479/XAB; RAE-52-1
Resource Type:
Technical Report
Research Org:
Rogers and Associates Engineering Corp., Salt Lake City, UT (USA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; COAL; ACTIVATION ANALYSIS; ATTENUATION; CAPTURE; GAMMA RADIATION; GAMMA SPECTRA; NEUTRON REACTIONS; PROMPT NEUTRONS; BARYON REACTIONS; BARYONS; CARBONACEOUS MATERIALS; CHEMICAL ANALYSIS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY SOURCES; FERMIONS; FISSION NEUTRONS; FOSSIL FUELS; FUELS; HADRON REACTIONS; HADRONS; IONIZING RADIATIONS; MATERIALS; NEUTRONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUCLEONS; RADIATIONS; SPECTRA 400101* -- Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures; 010600 -- Coal, Lignite, & Peat-- Properties & Composition