Local order in ThO2: what are the differences with UO2?
We aim at measuring ThO and ThTh nearest-neighbor distances in ThO2 as a function of temperature using PDF-analysis in order to compare with our previous results on UO and UU distances in UO2. The nearest-neighbor UO distance in UO2, as defined by the peak in the UO distance distribution seen in the PDF(r), decreases with increasing temperature whereas the UU distance follows the unit cell thermal expansion. A comparison with ThO2 will test whether this unusual behavior is a consequence of electron-lattice interactions from the two 5f electrons in UO2, or due soley to MO2 phonons in the fluorite structure, since the Th atom has no 5f electrons in ThO2. Other than this result, neutron diffraction data on ThO2 PDF at high temperature are lacking in literature, and are needed for proper modeling of the structure and dynamics of actinide dioxides.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
DESGRANGES Lionel; BALDINOZZI Gianguido; Henry E. Fischer and MEVEN Martin. (2023). Local order in ThO2: what are the differences with UO2?. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-06-520
This data is not yet public
This data is not yet public
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.