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Specific Heat in the Pu-Am system

Published online by Cambridge University Press:  26 February 2011

Ladislav Havela,
Pavel Javorský,
Alexander Shick,
Franck Wastin and
Eric Colineau
Ladislav Havela
Affiliation:
havela@mag.mff.cuni.cz, Charles University, Dept. of Condensed Matter Physics, Ke Karlovu 5, Prague 2, CZ 121 16, Czech Republic, +420-221911351, +420-221911351
Pavel Javorský
Affiliation:
javor@mag.mff.cuni.cz, Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, Prague 2, CZ-12116, Czech Republic
Alexander Shick
Affiliation:
shick@fzu.cz, Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 8, CZ-18221, Czech Republic
Franck Wastin
Affiliation:
franck.wastin@ec.europa.eu, European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, Karlsruhe, D-76125, Germany
Eric Colineau
Affiliation:
Eric.COLINEAU@cec.eu.int, European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, Karlsruhe, D-76125, Germany
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Abstract

Specific heat of Pu doped with Am was studied for several Am concentrations (8-20%) ensuring the δ-Pu fcc structure. The results reveal that the γ value of the low temperature specific heat is lower than originally assumed (γ of 35 - 55 mJ/mol K2 can be deduced for Pu-8%Am) and does not increase with the Am-induced lattice expansion. The findings can be taken as an indication of the absence of the Pu-5f states at the Fermi level.

Keywords

Puspecific heatalloy

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