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Classification of Materials Using Nuclear Magnetic Resonance Dispersion and/or X-Ray Absorption

United States Patent Application

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Methods for determining the identity of a substance are provided. A classification parameter set is defined to allow identification of substances that previously could not be identified or to allow identification of substances with a higher degree of confidence. The classification parameter set may include at least one of relative nuclear susceptibility (RNS) or an x-ray linear attenuation coefficient (LAC). RNS represents the density of hydrogen nuclei present in a substance relative to the density of hydrogen nuclei present in water. The extended classification parameter set may include T.sub.1, T.sub.2, and/or T.sub.1.rho. as well as at least one additional classification parameter comprising one of RNS or LAC. Values obtained for additional classification parameters as well as values obtained for T.sub.1, T.sub.2, and T.sub.1.rho. can be compared to known classification parameter values to determine whether a particular substance is a known material.
Espy, Michelle A. (Los Alamos, NM), Matlashov, Andrei N. (Los Alamos, NM), Schultz, Larry J. (Los Alamos, NM), Volegov, Petr L. (Los Alamos, NM), Urbaitis, Algis (Albuquerque, NM), Sandin, Henrik (Los Alamos, NM), Yoder, Jacob (Los Alamos, NM), Surko, Stephen (Chevy Chase, MD)
13/ 869,705
April 24, 2013
STATEMENT REGARDING FEDERAL RIGHTS [0002] This invention was made with government support under Contract No. DE-AC52-06NA25396, awarded by the U.S. Department of Energy to Los Alamos National Security, LLC for the operation of the Los Alamos National Laboratory. The government has certain rights in the invention.