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Real time method and computer system for identifying radioactive materials from HPGe gamma-ray spectroscopy

United States Patent

October 23, 2007
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A real-time method and computer system for identifying radioactive materials which collects gamma count rates from a HPGe gamma-radiation detector to produce a high-resolution gamma-ray energy spectrum. A library of nuclear material definitions ("library definitions") is provided, with each uniquely associated with a nuclide or isotope material and each comprising at least one logic condition associated with a spectral parameter of a gamma-ray energy spectrum. The method determines whether the spectral parameters of said high-resolution gamma-ray energy spectrum satisfy all the logic conditions of any one of the library definitions, and subsequently uniquely identifies the material type as that nuclide or isotope material associated with the satisfied library definition. The method is iteratively repeated to update the spectrum and identification in real time.
Rowland; Mark S. (Alamo, CA), Howard; Douglas E. (Livermore, CA), Wong; James L. (Dublin, CA), Jessup; James L. (Tracy, CA), Bianchini; Greg M. (Livermore, CA), Miller; Wayne O. (Livermore, CA)
The Regents of the University of California (Oakland, CA)
10/ 828,010
April 19, 2004
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.