Theoretical Modelling of High-Resolution X-Ray Absorption Spectra at Uranium M4 Edge

TL;DR

This paper develops a theoretical model to understand satellite features in high-resolution X-ray absorption spectra at the uranium M4 edge, focusing on U6+ compounds, using a combination of Anderson impurity model and density-functional theory.

Contribution

It introduces a material-specific Anderson impurity model based on DFT to explain spectral satellite features at the uranium M4 edge.

Findings

Identifies the origin of satellite features in uranium spectra.

Provides a theoretical framework for analyzing high-resolution X-ray spectra.

Enhances understanding of electronic structure in uranium compounds.

Abstract

We investigate the origin of satellite features that appear in the high-resolution x-ray absorption spectra measured at the uranium M 4 edge in compounds where the uranium atoms are in the U 6+ oxidation state. We employ a material-specific Anderson impurity model derived from the electronic structure obtained by the density-functional theory.