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Split energy radiation detection

  • US 5,138,167 A
  • Filed: 01/23/1991
  • Issued: 08/11/1992
  • Est. Priority Date: 01/23/1991
  • Status: Expired due to Term
First Claim
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1. An energy discriminating radiation detector comprising:

  • a) a first element comprising a first material of a kind which is preferentially responsive to penetrative radiation of a first energy range, said response being defined by a first characteristic, said first characteristic defining a first peak radiation absorptive energy value;

    b) a second element comprising a second material different from said first material and of a kind which is preferentially responsive to penetrative radiation of a second energy range said response being defined by a second characteristic, said second energy range extending higher than said first energy range, said second characteristic defining a second peak radiation absorptive energy value higher than said first peak energy value, said second element being positioned to receive radiation which has penetrated through a portion of said first element, andc) a filter of penetrative radiation interposed between said first and second elements, said filter comprising material and having thickness such that said filter exhibits a main radiation attenuation roll off with respect to energy, said roll off occurring at an energy value lower than said second peak value.

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