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Title: New insight into UO2F2 particulate structure by micro-Raman spectroscopy

Uranyl fluoride particles produced via hydrolysis of uranium hexafluoride have been deposited on different substrates: polished graphite disks, silver foil, stainless steel and gold-coated silicon wafer, and measured with micro-Raman spectroscopy (MRS). All three metallic substrates enhanced the Raman signal delivered by UO2F2 in comparison to graphite. The fundamental stretching of the U–O band appeared at 867 cm–1 in case of the graphite substrate, while in case of the others it was shifted to lower frequencies (down to 839 cm–1). All applied metallic substrates showed the expected effect of Raman signal enhancement; however the gold layer appeared to be most effective. Lastly, application of new substrates provides more information on the molecular structure of uranyl fluoride precipitation, which is interesting for nuclear safeguards and nuclear environmental analysis.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [2]
  1. Univ. of Lublin, Lublin (Poland); European Commission Joint Research Centre, Retieseweg (Belgium)
  2. Univ. of Antwerp, Antwerp (Belgium)
  3. European Commission Joint Research Centre, Retieseweg (Belgium)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
OSTI Identifier:
1248263
Report Number(s):
LLNL-JRNL--623434
Journal ID: ISSN 0022-2860
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Journal of Molecular Structure
Additional Journal Information:
Journal Volume: 1040; Journal Issue: C; Journal ID: ISSN 0022-2860
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND RUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY uranyl fluoride; uranium particles; UF6 hydrolysis; micro-Raman spectroscopy; nuclear safeguards