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Integrated substance detection and identification system

  • US 5,557,108 A
  • Filed: 06/15/1995
  • Issued: 09/17/1996
  • Est. Priority Date: 10/25/1993
  • Status: Expired due to Term
First Claim
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1. A method for identifying substances disposed behind a barrier having a front, said method comprising the steps of:

  • positioning a radioactive source on the front side of the barrier, said source providing a flux of gamma rays and fast neutrons;

    positioning a detector near said source, said detector capable of measuring a flux of scattered gamma rays and generating a gamma ray output signal corresponding to a magnitude of said scattered gamma rays, and said detector capable of measuring a flux of scattered neutrons and generating a neutron output signal corresponding to a magnitude of said scattered neutrons; and

    comparing the magnitude of said detector output signals to determine the identity of substances disposed behind said barrier.

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