New insight into UO2F2 particulate structure by micro-Raman spectroscopy

Uranyl fluoride particles produced via controlled 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 the graphite one. The fundamental stretching of the U-O band appeared at 867cm-1 in case of the graphite substrate, while in case of the others it was shifted to lower frequencies (847-839 cm-1). All applied metallic substrates showed the expected effect of Raman signal enhancement with respect to Uranyl stretching vibration; however the gold layer appeared most effective. Application of this improved method for MRS analysis of uranyl fluoride particles could be found in the field of nuclear safeguards and environmental analysis.

STEFANIAK Elzbieta;  DARCHUK Larysa;  SAPUNDJIEV Danislav;  KIPS Ruth;  AREGBE Yetunde;  VAN GRIEKEN R.; 

2013-05-03

ELSEVIER SCIENCE BV

JRC63143

0022-2860,   

http://dx.doi.org/10.1016/j.molstruc.2013.02.012,    https://publications.jrc.ec.europa.eu/repository/handle/JRC63143,   

10.1016/j.molstruc.2013.02.012,