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|Title:||Lattice Vibrations in Alpha-Uranium - Non-Linearity and Localization|
|Authors:||MANLEY M.e.; YETHIRAJ M.; SINN H.; VOLZ H.m.; ALATAS A.; LASHLEY J.c.; HULTS W.l.; LANDER Gerard; SMITH J.l.|
|Citation:||Proceedings of Plutonium Futures - The Sciences 2006 - A Topical Conference on Plutonium and Actinides vol. UCRL-PROC-222342 p. 126-127|
|Publisher:||U.S. Department of Energy by University of California, Lawrence Livermore National Laboratory|
|Type:||Articles in periodicals and books|
|Abstract:||Non-linearity refers to a situation where small perturbations cause large shifts in the excitation spectrum. By this definition the phonons in α-uranium are quite non-linear, the phonon DOS can soften by as much as 10% when the temperature changes by as little as 100 K . Although thermal softening is an expected consequence of anharmonicity, α- uranium is unusual in that it does not show behavior typically associated with a strongly anharmonic solid. First, the elastic energy of expansion can only account for about 10% of the observed softening|
|JRC Directorate:||Nuclear Safety and Security|
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