Electronic structure of the light actinide oxides from electron spectroscopy (invited)

Gunnarsson, O. ; Sarma, D. D. ; Hillebrecht, F. U. ; Schönhammer, K. (1988) Electronic structure of the light actinide oxides from electron spectroscopy (invited) Journal of Applied Physics, 63 (8). pp. 3676-3679. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v63/i8/p3676_...

Related URL: http://dx.doi.org/10.1063/1.340683

Abstract

The 4f core level spectra of ThO2, UO2, and NpO2 are shown to be well described in the Anderson impurity model. The O(2p)-actinide (5f) hybridization is found to be very large. This leads to a new interpretation of the 7-eV satellite in the 4f spectrum, which corresponds to an antibonding 5f n-5f n+1 final state, where n=0,2, and 3 for ThO2, UO2, and NpO2, respectively. The resonance photoemission 4f spectrum is studied, and it is found that interference between different intermediate states is crucial for its interpretation. In particular, the photon energy dependence (CIS spectrum) is strongly influenced by these interference effects. In the 5f valence spectrum of UO2 the theory gives a satellite, which is due to a split-off state caused by the large hybridization.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Thorium Oxides; Uranium Oxides; Neptunium Oxides; Electronic Structure; Impurities; Energy Levels; Physical Radiation Effects; Electron Spectroscopy; X-radiation; Electron Emission; Theoretical Data; Mathematical Models
ID Code:46297
Deposited On:04 Jul 2011 12:14
Last Modified:04 Jul 2011 12:14

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