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Anharmonic specific heat of solid UO2

Hyland, GJ; Stoneham, AM; (1981) Anharmonic specific heat of solid UO2. Journal of Nuclear Materials , 96 (1-2) 1 - 4. 10.1016/0022-3115(81)90211-7. Green open access

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Abstract

The specific heat of UO2 and related fluorite crystals contains a contribution from the anharmonic motion of the anion. We evaluate this term using thermodynamic perturbation theory and known parameters from neutron experiments. It is negligible (less than 2% of the total observed) up to 1273 K for UO2, the highest temperatures for which anharmonicity parameters are known. Extension of the scattering experiments to higher temperatures will be necessary before anharmonic contributions to the specific heat anomaly can be assessed reliably and their importance relative to other conjectured mechanisms, notably electronic disorder, adjudged.

Type: Article
Title: Anharmonic specific heat of solid UO2
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/0022-3115(81)90211-7
Publisher version: http://dx.doi.org/10.1016/0022-3115(81)90211-7
Additional information: Text made available to UCL Discovery by kind permission of Elsevier B.V., 2012
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/59710
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