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Title: Round-robin 230Th–234U age dating of bulk uranium for nuclear forensics

We report that in an inter-laboratory measurement comparison study, four laboratories determined 230Th–234U model ages of uranium certified reference material NBL U050 using isotope dilution mass spectrometry. The model dates determined by the participating laboratories range from 9 March 1956 to 19 October 1957, and are indistinguishable given the associated measurement uncertainties. These model ages are concordant with to slightly older than the known production age of NBL U050.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [2] ;  [1] ;  [3] ;  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. CEA, Arpajon (France)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Japan Atomic Energy Agency, Ibaraki (Japan)
Publication Date:
OSTI Identifier:
1227731
Report Number(s):
LA-UR-15-22623; LLNL-JRNL-668387
Journal ID: ISSN 0236-5731; PII: 4334
Grant/Contract Number:
AC52-06NA25396; AC52-07NA27344; LA-UR-15-22623
Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Name: Journal of Radioanalytical and Nuclear Chemistry; Journal ID: ISSN 0236-5731
Publisher:
Springer
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; radiochronometry; 230Th–234U age dating; nuclear forensics; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ²³⁰TH -²³⁴U age dating