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http://publications.jrc.ec.europa.eu/repository/handle/JRC61233| Title: | Sommerfeld Coefficient of d-Pu Determined Via a Low-Temperature Specific Heat Pu-Ce Study |
| Authors: | HAVELA L.; JAVORSKY P.; SHICK A. B.; KOLORENC J.; COLINEAU Eric; REBIZANT J.; WASTIN Franck; GRIVEAU Jean-Christophe; JOLLY L.; TEXIER Gwenael; DELAUNAY F.; BACLET N. |
| Citation: | PHYSICAL REVIEW B vol. 82 no. 15 p. 155540 (1- 5) |
| Publisher: | AMER PHYSICAL SOC |
| Publication Year: | 2010 |
| JRC N°: | JRC61233 |
| ISSN: | 1098-0121 |
| URI: | http://publications.jrc.ec.europa.eu/repository/handle/JRC61233 |
| DOI: | 10.1103/PhysRevB.82.155140 |
| Type: | Articles in periodicals and books |
| Abstract: | Low-temperature specific-heat experiments on d-Pu stabilized by Ce give the value of the Sommerfeld coefficient ¿ in the close vicinity of 40 mJ/mol K2. The most precise data set for Pu-6.1 at. % Ce yields ¿ =(41.5±0.5) mJ/mol K2 and the Debye temperature TD=(103.0±0.5 K). As Ce is in a compressed a-Ce state, major contribution to the ¿ value comes from the Pu states. Theoretical calculations suggest that the 5f6 admixture in the 5f5 ground state is responsible for the high-¿ value. Although the 5f states are not present at the Fermi level, low-energy excitations due to transitions of the 5f6¿5f5 type contribute to the spectral density around the Fermi level. |
| JRC Directorate: | Nuclear Safety and Security |
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