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@ARTICLE{Schmidt:894000,
      author       = {Schmidt, Holger and Wilden, Andreas and Modolo, Giuseppe
                      and Bosbach, Dirk and Santiago-Schübel, Beatrix and Hupert,
                      Michelle and Mincher, Bruce J. and Mezyk, Stephen P. and
                      Švehla, Jaroslav and Grüner, Bohumir and Ekberg,
                      Christian},
      title        = {{G}amma and pulsed electron radiolysis studies of
                      {C}y{M}e4{BTBP} and {C}y{M}e4{BTP}hen: {I}dentification of
                      radiolysis products and effects on the hydrometallurgical
                      separation of trivalent actinides and lanthanides},
      journal      = {Radiation physics and chemistry},
      volume       = {189},
      issn         = {0146-5724},
      address      = {Frankfurt, M.},
      publisher    = {Pergamon Press},
      reportid     = {FZJ-2021-02976},
      pages        = {109696},
      year         = {2021},
      abstract     = {The radiolytic stability of the highly selective ligands
                      CyMe4BTBP and CyMe4BTPhen against ionizing gamma
                      radiationwas studied in 1-octanol solution. CyMe4BTBP and
                      CyMe4BTPhen are important extractants for a
                      potentialtreatment of used nuclear fuel. They were studied
                      under identical experimental conditions to directly
                      comparethe effects of gamma and pulsed electron radiolysis
                      on the ligands and systematically study the influence
                      ofstructural changes in the ligand backbone. Distribution
                      ratios of Am3+, Cm3+ and Eu3+, the residual concentrationof
                      CyMe4BTBP and CyMe4BTPhen in solution, and the formation of
                      radiolysis products were studied as afunction of absorbed
                      gamma dose and presence of an acidic aqueous phase during
                      irradiation. Quantitative andsemi-quantitative analyses were
                      used to elucidate the radiolysis mechanism for both ligands.
                      Addition productsof alpha-hydroxyoctyl radicals formed
                      through radiolysis of the 1-octanol diluent to the ligand
                      molecules wereidentified as the predominant radiolysis
                      products. These addition products also extract trivalent
                      metal ions, asdistribution ratios remained high although the
                      parent molecule concentrations decreased. Therefore, the
                      utilizationtime of a solvent using these extractants under
                      the harsh conditions of used nuclear fuel treatment could
                      beconsiderably longer than expected. Understanding the
                      radiolysis mechanism is crucial for designing more
                      radiationresistant extractants.},
      cin          = {IEK-6 / ZEA-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {1412 - Predisposal (POF4-141) / SACSESS - Safety of
                      ACtinide Separation proceSSes (323282) / GENIORS - GEN IV
                      Integrated Oxide fuels recycling strategies (755171) /
                      BMBF-02NUK059D - Spektroskopische Charakterisierung von
                      f-Element-Komplexen mit soft donor-Liganden (f-Char)
                      (BMBF-02NUK059D)},
      pid          = {G:(DE-HGF)POF4-1412 / G:(EU-Grant)323282 /
                      G:(EU-Grant)755171 / G:(DE-Juel1)BMBF-02NUK059D},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000704351600003},
      doi          = {10.1016/j.radphyschem.2021.109696},
      url          = {https://juser.fz-juelich.de/record/894000},
}