Trivalent Actinide Incorporation into Zirconium(IV) oxide – Spectroscopic Investigations of Defect Fluorite Structures


Trivalent Actinide Incorporation into Zirconium(IV) oxide – Spectroscopic Investigations of Defect Fluorite Structures

Eibl, M.; Shaw, S.; Morris, K.; Stumpf, T.; Huittinen, N.

The structural incorporation of trivalent ions, i.e. Y(III), Eu(III) and Cm(III) was studied with powder X-ray diffraction (PXRD) and various spectroscopic methods including site-selective time-resolved laser fluorescence-spectroscopy (TRLFS) and extended X-ray absorption fine structure spectroscopy (EXAFS). A clear mismatch of the bulk behavior in the stabilized tetragonal and cubic phases with its local structure was observed. Furthermore, it could be seen, that no quantitative structural incorporation into the monoclinic phase is achieved. A very strong shift of the laser fluorescence emission maximum of Cm(III) doped cubic phases compared to the Cm(III) aquo ion could be measured. It was shown that TRLFS is a powerful method to study defect structures, especially in combination with PXRD as a bulk characterization method.

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    Plutonium Futures 2018, 09.-14.09.2018, San Diego, USA

Permalink: https://www.hzdr.de/publications/Publ-27868
Publ.-Id: 27868