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Detection of nuclear materials

  • US 8,173,970 B2
  • Filed: 02/06/2006
  • Issued: 05/08/2012
  • Est. Priority Date: 02/04/2005
  • Status: Expired due to Fees
First Claim
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1. A method for detecting Special Nuclear Materials (SNM) or Radiological dispersion Devices (RDD), comprising:

  • moving a vehicle, shipping container or trailer along a predetermined path;

    recording a two or three dimensional spatial distribution of radioactive sources that spontaneously emit gamma radiation associated with the vehicle, shipping container or trailer, as the vehicle, shipping container or trailer passes along said path; and

    determining the presence and location of one or both of an RDD or SNM within the vehicle, shipping container or trailer from said distribution,wherein recording comprises utilizing an imaging detector or detectors having an energy resolution FWHM of <

    28% for Cs137 without relative vertical movement thereof to image said radiation sources over the vehicle, shipping container or trailer.

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