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This content will become publicly available on July 27, 2018

Title: A new thorium-229 reference material

A new reference material was characterized for 229Th molality and thorium isotope amount ratios. This reference material is intended for use in nuclear forensic analyses as an isotope dilution mass spectrometry spike. The reference material value and expanded uncertainty (k = 2) for the 229Th molality is (1.1498 ± 0.0016)×10 -10 mol g -1 solution. The value and expanded uncertainty (k = 2) for the n( 230Th)/n( 229Th) ratio is (5.18 ± 0.26)×10 -5 and the n( 232Th)/n( 229Th) ratio is (3.815 ± 0.092)×10 -4.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Alternative Energies and Atomic Energy Commission (CEA), Bruyeres-le-Chatel (France)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Univ. Paris Diderot (France)
Publication Date:
Report Number(s):
LLNL-JRNL-737011
Journal ID: ISSN 0969-8043
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Applied Radiation and Isotopes
Additional Journal Information:
Journal Volume: 134; Journal Issue: C; Journal ID: ISSN 0969-8043
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPES AND RADIATION SOURCES; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
OSTI Identifier:
1426068