Diffusion of Sn in Pb to 30 kbar

Abstract

The diffusion of ${}_{}{}^{113}{}_{}{}^{}\mathrm{Sn}$ in Pb was measured up to a pressure of 29 kbar with the following results: activation energy 1.03 ± 0.03 eV/atom, activation volume $\Delta V=9.7\mathrm{}\pm 0.5$ ${\mathrm{cm}}^3$/mole, $D_0=0.41\mathrm{}\pm 0.26$ ${\mathrm{cm}}^2$/sec at the melting point at atmospheric pressure. The results are discussed in relation to lead self-diffusion and the anomalous diffusers in lead.