Paul Tobash1 Eric Bauer1 Jeremy Mitchell1 Franz Freibert1 Daniel Schwartz1 Thomas Albrecht-Schmitt2 David Wheeler3

1, Los Alamos National Laboratory, Los Alamos, New Mexico, United States
2, Florida State University, Tallahassee, Florida, United States
3, AWE, Aldermaston, , United Kingdom

This presentation will describe some recent work on heat capacity studies for several Pu alloys that include low weight percent Ga alloys (Pu-0.614at.%Ga – Pu-1.425at.%Ga) as well as some thermophysical and metallurgy results on the monocarbide PuC1-x.
Specific heat measurements have been completed on several gallium stabilized delta-Pu alloys up to 7at.%Ga. The measurements suggest that the low weight percent compositions transition to the alpha-prime Pu structure at low temperatures. Some additional trends will be discussed in relation to electronic correlations and Sommerfeld coefficients in these materials.