Kondo entropy of δ-phase plutonium and its impact on Pu alloy phase diagrams

摘要

We present a new analysis of the heat capacity of δ-phase Pu-5 at. Al with a fit using a single-ion Kondo term and a low-temperature Schottky anomaly in addition to the Debye and linear terms. The Kondo and Schottky terms together contribute 1.2 R to the entropy at 300 K. We show how the extra entropy could affect the alloy phase diagrams of δ-phase Pu.