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@ARTICLE{Sundermann:639470,
      author       = {Sundermann, Martin and Hahn, Henrik and Christovam, Denise
                      S. and Haverkort, Maurits W. and Caciuffo, Roberto and
                      Keimer, Bernhard and Tjeng, Liu Hao and Severing, Andrea and
                      Gretarsson, Hlynur},
      title        = {{R}esonant inelastic x-ray scattering at the actinide
                      {M}$_{4,5}$ -edges},
      journal      = {Physical review research},
      volume       = {7},
      number       = {4},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {PUBDB-2025-04556},
      pages        = {043081},
      year         = {2025},
      abstract     = {Understanding the electronic structure of actinide
                      materials is crucial for both fundamental research and
                      nuclear applications. The partially filled 5⁢𝑓shells
                      exhibit complex behavior due to strong correlations and
                      ligand hybridization, requiring advanced spectroscopic
                      techniques. Here, we report on the development and
                      application of high-resolution valence band resonant
                      inelastic x-ray spectroscopy (VB-RIXS) experiments at the
                      uranium 𝑀$_{4,5}$ edges (3551 and 3725 eV). We present
                      data of UO$_2$, a well-established model actinide compound.
                      VB-RIXS is particularly well suited for probing the
                      5⁢𝑓-shell electronic structure, as it probes, in
                      contrast to core-to-core RIXS, excitations without leaving a
                      high-energy core hole in the final state. In VB-RIXS, we
                      achieve energy resolutions of 50 meV (𝑀$_5$) and 90 meV
                      (𝑀$_4$), enabling the resolution of multiplet excitations
                      and crystal-field effects, as well as charge-transfer and
                      fluorescencelike features with unprecedented clarity. As
                      such, high-resolution VB-RIXS offers direct insights into
                      both low-energy, near-ground-state properties and
                      high-energy hybridization and covalency effects. Our results
                      demonstrate the power of VB-RIXS as a versatile and powerful
                      tool for probing the strongly correlated electronic
                      structure of actinide materials, providing essential input
                      for quantitative modeling and the validation of theoretical
                      concepts.},
      cin          = {FS-PETRA-S / DOOR ; HAS-User},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-PETRA-S-20210408 /
                      I:(DE-H253)HAS-User-20120731},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      DFG project G:(GEPRIS)387555779 - Von versteckter bis
                      antiferromagnetischer Ordnung mit großem Moment in URu2Si2:
                      eine Röntgenstrahluntersuchung der 5f Besetzung und
                      Wellenfunktionssymmetrie. (387555779)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(GEPRIS)387555779},
      experiment   = {EXP:(DE-H253)P-P01-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/twsv-xh5j},
      url          = {https://bib-pubdb1.desy.de/record/639470},
}