Evaluation of T2g band intensity distribution across a surface of an UO2 ceramic

The present work is aimed at calculating the intensities of the intrinsic T2g band through an UO2 ceramic surface using electron back-scattering diffraction data. The theoretical intensity distribution is displayed in the form of a color-scale image and compared with an experimental Raman imaging map to establish circumstances of the T2g intensity variation within the UO2 ceramic surface and to determine the crystalline orientations. The results evidence a quite good coincidence between theory and experiment, although some grains highlight pronounced differences in T2g intensities for both maps. One therefore implies other “side” effects which make contribution to the T2g intensity behavior within a UO2 ceramic surface, such as different penetration depths of exciting beams in EBSD and Raman spectroscopy, or local stoichiometric changes.The present work is aimed at calculating the intensities of the intrinsic T2g band through an UO2 ceramic surface using electron back-scattering diffraction data. The theoretical intensity distribution is displayed in the form of a color-scale image and compared with an experimental Raman imaging map to establish circumstances of the T2g intensity variation within the UO2 ceramic surface and to determine the crystalline orientations. The results evidence a quite good coincidence between theory and experiment, although some grains highlight pronounced differences in T2g intensities for both maps. One therefore implies other “side” effects which make contribution to the T2g intensity behavior within a UO2 ceramic surface, such as different penetration depths of exciting beams in EBSD and Raman spectroscopy, or local stoichiometric changes.