Details

Autor(en) / Beteiligte

• Guimbretière, G.
• Desgranges, L.
• Jegou, C.
• Canizarès, A.
• Simon, P.
• Caraballo, R.
• Raimboux, N.
• Barthe, M.-F
• Ammar, M.-R
• Maslova, O. A.
• Duval, F.
• Omnée, R.

Titel

Characterization of Nuclear Materials in Extreme Conditions: Raman Spectroscopy Approach

Ist Teil von

• IEEE transactions on nuclear science, 2014-08, Vol.61 (4), p.2045-2051

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2014

Quelle

IEL

Beschreibungen/Notizen

• A review is given of our last advances on Raman spectroscopy characterization of irradiated and/or leached UO 2 , PuO 2 and (U,Pu)O 2 samples. For this purpose, three original Raman setups dedicated to the study of nuclear materials were involved. In every case, irradiation-induced Raman defect bands in the 500 - 750 cm -1 range was observed. For UO 2 , an annealing temperature experiment suggests that these defect bands could be the signatures of medium-range structured defects. Besides, the leaching experiments show different behavior between the irradiated in situ probed UO 2 ceramic and post mortem probed [UO 2 + (U,Pu)O 2 ] sample: The growth of an altered layer made of studtite and schoepite phases was monitored at the surface of UO 2 ceramic, while post-mortem studies reveal the presence of U 3 O 8 and studtite phases at the surface of the UO 2 grains of the binary sample. No alteration layer was observed at the surface of the leached (U,Pu)O 2 grains.