Structural Investigations on an Aged Americium Transmutation Fuel
Within the EFTTRA-T4 project a MgAl2O4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L3-edge EXAFS of the annealed material indicate that Am is present as AmAlO3. During 10 years of storage the material
accumulated self-irradiation damage and no AmAlO3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative a-damage of 2.9 . 1019 g1 AmAlO3. The Am L3-edge EXAFS of the
amorphous AmAlO3 shows that structural order is limited to the first oxygen shell around Am, where the rhombohedral splitting in three sub-shells is still present. Evidence for a single Al atom in the next shell is found at an Am–Al distance of
3.28A.
WALTER Marcus;
SOMERS Joseph;
FERNANDEZ CARRETERO Asuncion;
HAAS Didier;
DARDENNE P.;
DENECKE M.;
2007-07-18
ELSEVIER SCIENCE BV
JRC37952
https://publications.jrc.ec.europa.eu/repository/handle/JRC37952,
10.1016/j.jnucmat.2007.01.082,
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