Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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Page(s) | C2-1 - C2-8 | |
DOI | https://doi.org/10.1051/jp4/1997002 |
J. Phys. IV France 7 (1997) C2-1-C2-8
DOI: 10.1051/jp4/1997002
Theory of X-Ray Absorption and Resonant X-Ray Emission Spectra
Akio KotaniInstitute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo 106, Japan
Abstract
Resonant X-ray emission spectrum (RXES) has recently been a subject of remarkable progress. Theoretically, RXES
is formulated as a coherent second order optical process, where the X-ray emission follows the X-ray absorption (XAS) of a core
electron. In this paper I discuss from theoretical viewpoint XAS and RXES in ƒ and d electron systems, which are calculated
with an impurity Anderson model. Effects of intra-atomic multiplet coupling and interatomic hybridization are taken into account.
RXES is calculated for some rare earth compounds and transition metal compounds as a function of the emitted photon energy ω,
and it is shown that the RXES gives us information on the electronic excitations (multiplet states and charge transfer states) in the
ground state configuration. When we regard RXES as a function of the incident photon energy with Ω fixed ω, the RXES gives us
information on the core electron excited states (with more information than XAS). These results are also compared with available
experimental data.
© EDP Sciences 1997