| Autor: |
Jon Betts, Franz J. Freibert, Izabela Stroe, Cristian Pantea, M. Ramos, Anna T. Trugman, Albert Migliori, Charles H. Mielke, Jeremy N. Mitchell |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
The Journal of the Acoustical Society of America. 125:2654-2654 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.4784158 |
| Popis: |
The elastic properties of pure polycrystalline Pu were investigated as a function of temperature by resonant ultrasound spectroscopy. For both alpha and gamma phase, shear (G) and longitudinal (CL) elastic moduli were determined simultaneously and the bulk modulus (B) was computed from them. In alpha phase, G and B exhibit the same temperature dependence, but an unusually large change. This behavior together with a high Gruneiser parameter and an almost temperature independent Poisson ratio is attributed to the 5‐f electron localization delocalization. In the gamma phase, G and B show anomalous temperature behavior: G decreases with temperature while B is near temperature independent. The Poisson ratio increases with temperature by 4%. This normal behavior of the Poisson ratio is unusual for Pu. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
