PES_An-O-Films-ice

The interaction of thin films of different actinide oxides with adsorbed water ice was studied by ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS, respectively). The studies address radiation enhanced reactions, occurring at the actinide oxide surfaces in contact with an aqueous phase under UV-irradiation. This reaction was observed for PuO2 in 2010 and then extended to other actinide oxide surfaces (NpO2, UO3, UPuO2, UThO2). The thin films were produced by reactive sputter deposition from metal targets in an Ar/O2 plasma. Water was condensed as a thick ice overlayer on the surface at low temperature. Subsequent warming led to desorption of the ice and a reduction of the uppermost surface under irradiation by UV-light (from HeI and HeII radiation used for UPS). The observed surface reduction for the materials was tentatively explained as a photoactivated reaction of the surface with the surrounding water phase. The data collection comprises 4 datasets with a Lab Book together with the spectra data stored in the VAMAS format. This is a universal form used by many commercial data analysis programs such as CasaXPS. For easier accessibility, you will also find a zip file of the whole datasets.

ELOIRDI Rachel;  GOUDER Thomas; 

2023-03-03

European Commission - Joint Research Centre

JRC132793

https://doi.org/10.5281/zenodo.7691167,    https://publications.jrc.ec.europa.eu/repository/handle/JRC132793,   

10.5281/zenodo.7691167 (online),