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|Title:||Electron Spectroscopy Study of Pu and Pu Compounds|
|Authors:||GOUDER THOMAS; HAVELA L.|
|Citation:||JOURNAL OF ALLOYS AND COMPOUNDS vol. 444-445 p. 149-153|
|Publisher:||ELSEVIER SCIENCE SA|
|Type:||Articles in periodicals and books|
|Abstract:||Core-level and valence-band spectra of Pu and the other early actinide compounds show remarkable systematics, which can be understood in the framework of final state screening. For 4f core-level spectra, approaching 5f localization results in a change of screening mechanism of the core-hole, from f- to d-screening. In the transition region, both screening types coexist, leading to two-peak spectra with d- and f-screened components. A similar mixed-final-state-configuration is observed in the valence band spectra. Here the transition from itinerant to localized 5f character is observed as transition from band-like f-spectra (like in U) to f-screened and finally d-screened final state multiplet peaks of localized f-states. Observed multiplets resemble atomic multiplets, 5fn-1 for the d-screened, 5fn for the f-screened. This interpretation can be extended to the neighbouring actinide elements (Am and Np) and gives a consistent interpretation of spectra of many actinide compounds|
|JRC Directorate:||Nuclear Safety and Security|
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