Uranium and plutonium solution assays by transmission-corrected x-ray fluorescence

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We have developed an x-ray fluorescence analysis technique for uranium and plutonium solutions which compensates for variations in the absorption of the exciting gamma rays and fluorescent x-rays. We use {sup 57}Co to efficiently excite the K lines of the elements, and a mixed {sup 57}Co plus {sup 153}Gd transmission source to correct for variations in absorption. The absorption correction is a unique feature of our technique which permits accurate calibration with a single solution standard and the measurement of a wide range of concentrations (up to 300 grams per liter). Without this correction procedure, up to six solution standards ... continued below

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275 Kilobytes pages

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Ruhter, W D & Ryon, R W July 29, 1998.

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We have developed an x-ray fluorescence analysis technique for uranium and plutonium solutions which compensates for variations in the absorption of the exciting gamma rays and fluorescent x-rays. We use {sup 57}Co to efficiently excite the K lines of the elements, and a mixed {sup 57}Co plus {sup 153}Gd transmission source to correct for variations in absorption. The absorption correction is a unique feature of our technique which permits accurate calibration with a single solution standard and the measurement of a wide range of concentrations (up to 300 grams per liter). Without this correction procedure, up to six solution standards are required to correct for non-linearity over this concentration range. In addition, other elements present in the specimens and not present in the standards would otherwise reduce the accuracy or even invalidate the analyses. Specially designed equipment incorporates a planar intrinsic germanium detector, excitation and transmission radioisotopes, and specimen holder. The apparatus can be inserted into a rubber glove of a glovebox, keeping the apparatus outside and the solutions inside the glovebox, thereby protecting the user and the equipment from possible contamination. This technique will be tested at the Bochvar Institute of Inorganic Materials in Moscow for possible use in the Russian complex of nuclear facilities. This is part of a cooperative program between laboratories in the United States and Russia to strengthen systems of nuclear materials protection, control, and accountability (MPC and A) in both countries. A part of this program is to accurately measure and track inventories of materials, thus the need for good non-destructive analytical techniques.

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275 Kilobytes pages

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  • European Conference on Energy Dispersive X-Ray Spectrometry, Bologna (IT), 06/08/1998--06/12/1998

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  • Report No.: UCRL-JC-130094
  • Report No.: GJ0800000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14545
  • Archival Resource Key: ark:/67531/metadc620551

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 29, 1998

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:09 p.m.

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Ruhter, W D & Ryon, R W. Uranium and plutonium solution assays by transmission-corrected x-ray fluorescence, article, July 29, 1998; California. (digital.library.unt.edu/ark:/67531/metadc620551/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.