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Photoemission spectroscopy using ultraviolet (UPS) and X-ray light (XPS) either from conventional laboratory light or synchrotron sources is well accepted in the determination of the electronic structure of solids. Because of the unique electronic structure of the actinides, particularly the influence of the 5f-electrons, and of the great importance of actinides with respect to nuclear safety, an electron spectrometer for XPS, AES, EELS and particular high resolution UPS on highly radioactive materials has been built at the Institute for Transuranium Elements. The performance of the spectrometer is described, with particular emphasis being given to high resolution UPS. It is shown that the high resolution, in combination with high counting rates, is essential for very highly reactive actinide materials. This is a result of the fast oxidation of the surface due to the segregation of bulk oxygen impurities to the surface. These effects are related to the development of a future synchrotron beam. Recent gas adsorption studies on Pu(14) and photoelectron studies on (U/Pu)O(2) fuel pellets and their dissolution residues are also reported.

Additional information

Authors: NAEGELE J R, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: ALS Workshop, Berkeley (US), October 1-2, 1992
Availability: Text not available
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