Resonant inelastic x-ray scattering from U3O8and UN.
J Phys Condens Matter
; 35(17)2023 Feb 28.
Article
en En
| MEDLINE
| ID: mdl-36735967
Resonant inelastic x-ray scattering (RIXS) using an incident energy tuned to the uraniumN4,5absorption edges is reported from epitaxial films ofα-U3O8and UN. Theory shows that for U3O8the multiplets associated with a 5f1configuration with a ground state of2F5/2and the excited state of2F7/2are observed. However, the strong transition predicted at a transfer energy of 1.67 eV is not observed. We assume this is a consequence of the intermediate state lifetime broadening due to interaction with continuum states when the transferred energy exceeds the onset of the continuum in the presence of the core hole. This hypothesis is supported by the results obtained for the 5f-itinerant system UN, where no sharp transitions have been observed, although the broad scattering response centred at â¼1 eV is considered a signature of a predominantly 5f3configuration in this band-like semi-metallic system. These experiments and theory add important information on these materials, both of which have been investigated since the 1960s, as well as whether RIXS at the uraniumNedge can become a valuable tool for actinide research.
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1
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2023
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Reino Unido