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@ARTICLE{Gilson:1037141,
      author       = {Gilson, Sara E. and Svitlyk, Volodymyr and Bukaemskiy,
                      Andrey A. and Niessen, Jonas and Lender, Theresa and Murphy,
                      Gabriel L. and Henkes, Maximilian and Lippold, Holger and
                      Marquardt, Julien and Akhmadaliev, Shavkat and Hennig,
                      Christoph and Winkler, Bjoern and Tonnesen, Thorsten and
                      Peters, Lars and Fischer, Cornelius and Huittinen, Nina},
      title        = {{M}icrostructural investigation of {A}u ion-irradiated
                      {E}u-doped {L}a{PO}4 ceramics and single crystals},
      journal      = {npj Materials degradation},
      volume       = {8},
      number       = {1},
      issn         = {2397-2106},
      address      = {[London]},
      publisher    = {Macmillan Publishers Limited, part of Springer Nature},
      reportid     = {FZJ-2025-00488},
      pages        = {83},
      year         = {2024},
      abstract     = {Ceramics and single crystals of LaPO4 monazite doped with
                      Eu(III) were irradiated with 14 MeV Au5+ ions at three
                      different fluences. Changes to crystallinity, local
                      coordination environments, and topography were probed using
                      grazing-incidence X-ray diffraction (GIXRD), vertical
                      scanning interferometry (VSI), scanning electron microscopy
                      (SEM), Raman, and luminescence spectroscopy. GIXRD data of
                      the ceramics revealed fluence dependent amorphization. A
                      similar level of amorphization was detected for samples
                      irradiated with 5 × 1013 ions/cm2 and
                      1 × 1014 ions/cm2, whereas the sample irradiated with
                      the highest fluence of 1 × 1015 ions/cm2 appeared
                      slightly less amorphous. VSI showed clear swelling of entire
                      grains at the highest ion fluence, while more localized
                      damage to grain boundaries was detected for ceramic samples
                      irradiated at the lowest fluence. Single crystal specimens
                      showed no pronounced topography changes following
                      irradiation. SEM images of the ceramic irradiated at the
                      highest fluence showed topological features indicative of
                      grain surface melting. Raman and luminescence data showed a
                      different degree of disorder in polycrystalline vs. single
                      crystal samples. While changes to PO4 vibrational modes were
                      observed in the ceramics, changes were more subtle or not
                      present in the single crystals. The opposite was observed
                      when probing the local Ln-O environment using Eu(III)
                      luminescence, where the larger changes in terms of an
                      elongation of the Eu-O (or La-O) bond and an increasing
                      relative disorder with increasing fluence were observed only
                      for the single crystals. The dissimilar trends observed in
                      irradiated single crystals and ceramics indicate that grain
                      boundary chemistry likely plays a significant role in the
                      radiation response.},
      cin          = {IFN-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IFN-2-20101013},
      pnm          = {1411 - Nuclear Waste Disposal (POF4-141) / BMBF 02NUK060B -
                      Verbundprojekt AcE: Grundlegende Untersuchungen zur
                      Immobilisierung von Actiniden mittels Einbau in
                      endlagerrelevante Festphasen, Teilprojekt B (02NUK060B)},
      pid          = {G:(DE-HGF)POF4-1411 / G:(BMBF)02NUK060B},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001294138400002},
      doi          = {10.1038/s41529-024-00504-3},
      url          = {https://juser.fz-juelich.de/record/1037141},
}