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@ARTICLE{Holliday:20714,
      author       = {Holliday, K.S. and Babelot, C. and Walther, C. and
                      Neumeier, S. and Bosbach, D. and Stumpf, Th.},
      title        = {{S}ite-selective time resolved laser fluorescence
                      spectroscopy of {E}u and {C}m dopted {L}a{PO}4},
      journal      = {Radiochimica acta},
      volume       = {100},
      issn         = {0033-8230},
      address      = {München},
      publisher    = {Oldenbourg},
      reportid     = {PreJuSER-20714},
      pages        = {189 - 195},
      year         = {2012},
      note         = {The authors thank Sebastian Buchner for technical
                      assistance with TRLFS measurements. This work co-financed by
                      the Helmholtz Gemeinschaft Deutscher Forschungszentren (HGF)
                      by supporting the Helmholtz-Hochschul-Nachwuchsgruppe
                      "Aufklarung geochemischer Reaktionsmechanismen an der
                      Wasser/Mineralphasen Grenzflache". This work also was
                      supported by the Ministerium fur Innovation, Wissenschaft,
                      Forschung und Technologie (MIWFT) des Landes
                      Nordrhein-Westfalen; AZ: 323-005-0911-0129.},
      abstract     = {Samples of LaPO4 doped with Eu3+ or Cm3+ were synthesized
                      by a hydrothermal process which resulted in a solid solution
                      at temperatures less than conventional processing. Time
                      resolved laser fluorescence spectroscopy was used to probe
                      the incorporated Eu3+ or Cm3+ in order to gain structural
                      information on its local environment. This revealed that
                      Eu3+ and Cm3+ incorporate on the La site as expected. The
                      emission spectrum of Eu3+ resolves the fully degenerate
                      5-fold splitting of the peaks in the F-2 transition due to
                      the low symmetry of the site, confirming previous
                      calculations. A minor site in the Eu3+ doped sample is
                      identified as coordinated with hydroxide contamination.
                      Direct excitation of Cm3+ doped samples show the presence of
                      "satellite" species. Although these spectral features have
                      been observed in Cm3+ doped LuPO4 and YPO4, this is the
                      first time that these satellites are resolved into their
                      individual species. These are hypothesized to be due to a
                      disturbance in the ideal structure which creates a break in
                      the equivalence of the four lanthanum sites within a unit
                      cell. The 4-fold ground state splitting of all species is
                      identical, although slightly shifted, indicating similar
                      environments. The fluorescence lifetimes were long (1.2 ms
                      for Cm and 3.6 ms for Eu) indicating an absence of water in
                      the immediate coordination sphere due to the incorporation
                      of the doping ion.},
      keywords     = {J (WoSType)},
      cin          = {IEK-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-6-20101013},
      pnm          = {Nukleare Sicherheitsforschung},
      pid          = {G:(DE-Juel1)FUEK404},
      shelfmark    = {Chemistry, Inorganic $\&$ Nuclear / Nuclear Science $\&$
                      Technology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000302738800006},
      doi          = {10.1524/ract.2012.1900},
      url          = {https://juser.fz-juelich.de/record/20714},
}