Analysis of fissionable material using delayed gamma rays from photofission

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The energetic gamma-ray spectra from the fission products of photofission have been investigated to determine whether photofission can identify heavily shielded fissionable material. Target samples of natural thorium, 93% enriched /sup 235/U, natural uranium, and 93% enriched /sup 239/Pu were irradiated with bremsstrahlung gamma rays produced by 10-MeV electrons from a small linear accelerator. The gamma-ray spectra for each of the four isotopes studied reveals a distinctive intensity distribution. For example, the intensity ratio of the pair of gamma rays at 1436 keV (/sup 138/Cs) and 1428 keV (/sup 94/Sr) is 1.9 for /sup 235/U, 2.4 for /sup 238/U, 1.7 ... continued below

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Pages: 10

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Hollas, C.L.; Close, D.A. & Moss, C.E. September 1, 1986.

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Description

The energetic gamma-ray spectra from the fission products of photofission have been investigated to determine whether photofission can identify heavily shielded fissionable material. Target samples of natural thorium, 93% enriched /sup 235/U, natural uranium, and 93% enriched /sup 239/Pu were irradiated with bremsstrahlung gamma rays produced by 10-MeV electrons from a small linear accelerator. The gamma-ray spectra for each of the four isotopes studied reveals a distinctive intensity distribution. For example, the intensity ratio of the pair of gamma rays at 1436 keV (/sup 138/Cs) and 1428 keV (/sup 94/Sr) is 1.9 for /sup 235/U, 2.4 for /sup 238/U, 1.7 for /sup 232/Th and 1.4 for /sup 239/Pu. 6 refs., 2 figs., 1 tab.

Physical Description

Pages: 10

Notes

NTIS, PC A02/MF A01.

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  • 9. international conference on application of accelerators in research and industry, Denton, TX, USA, 10 Nov 1986

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  • Other: DE87000167
  • Report No.: LA-UR-86-3363
  • Report No.: CONF-861114-2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5142032
  • Archival Resource Key: ark:/67531/metadc1059680

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1986

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 6:58 p.m.

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Hollas, C.L.; Close, D.A. & Moss, C.E. Analysis of fissionable material using delayed gamma rays from photofission, article, September 1, 1986; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1059680/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.