Associated-particle sealed-tube neutron probe for nonintrusive inspection

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The development and investigation of a small associated-particle sealed-tube neutron generator (APSTNG) show potential to allow the associated-particle method to be moved out of the laboratory into field applications. Alpha particles associated with 14 MeV neutrons generated from the D-T reaction travel in the opposite direction and are detected inside the sealed tube. Gamma-ray spectra of resulting neutron reactions in the inspected volume encompassed by the alpha- detector solid angle identify many nuclides. Flight-times determined from detection times of the gamma-rays and alpha-particles not only separate the prompt and delayed gamma-rays but can also yield a separate coarse tomographic image ... continued below

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5 p.

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Rhodes, E. & Dickerman, C.E. December 31, 1996.

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The development and investigation of a small associated-particle sealed-tube neutron generator (APSTNG) show potential to allow the associated-particle method to be moved out of the laboratory into field applications. Alpha particles associated with 14 MeV neutrons generated from the D-T reaction travel in the opposite direction and are detected inside the sealed tube. Gamma-ray spectra of resulting neutron reactions in the inspected volume encompassed by the alpha- detector solid angle identify many nuclides. Flight-times determined from detection times of the gamma-rays and alpha-particles not only separate the prompt and delayed gamma-rays but can also yield a separate coarse tomographic image of each identified nuclide, from a single orientation without collimation. A continuous ion beam allows data acquisition by relatively low-bandwidth commercial electronics. This efficient collection of maximum information from each detected neutron by the associated-particle method can allow a much lower source intensity than pulsed accelerator methods, provided a sufficient usable signal rate is obtained. When this method is coupled with a compact sealed-tube neutron generator, a relatively small, inexpensive, reliable, and easily maintainable inspection system can be developed, that is rugged enough to be transportable. Proof-of- concept laboratory experiments have been performed for simulated explosives, drugs, special nuclear materials, and chemical warfare agents. Based on lessons learned with the present APSTNG system, an advanced APSTNG system is being designed and built that will be transportable, yield a substantial neutron output increase, and provide a substantially improved target lifetime.

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5 p.

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INIS; OSTI as DE97003893

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  • 14. international conference on the application of accelerators in research and industry, Denton, TX (United States), 6-9 Nov 1996

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  • Other: DE97003893
  • Report No.: ANL/RE/CP--90532
  • Report No.: CONF-961110--29
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 352920
  • Archival Resource Key: ark:/67531/metadc684658

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Office of Scientific & Technical Information Technical Reports

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • May 20, 2016, 1:02 p.m.

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Rhodes, E. & Dickerman, C.E. Associated-particle sealed-tube neutron probe for nonintrusive inspection, article, December 31, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc684658/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.