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 EricREBIZANT J.WASTIN FranckGRIVEAU Jean-ChristopheJOLLY L.TEXIER GwenaelDELAUNAY F.BACLET N.
Citation: PHYSICAL REVIEW B vol. 82 no. 15 p. 155540 (1- 5)
Publisher: AMER PHYSICAL SOC
Publication Year: 2010
JRC Publication N°: JRC61233
ISSN: 1098-0121
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC61233
DOI: 10.1103/PhysRevB.82.155140
Type: Articles in Journals
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 Institute:Institute for Transuranium Elements

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