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 \ifmmode\pm\else\textpm\fi{} 0.03 eV/atom, activation volume $\ensuremath{\Delta}V=9.7\ifmmode\pm\else\textpm\fi{}0.5$ ${\mathrm{cm}}^{3}$/mole, ${D}_{0}=0.41\ifmmode\pm\else\textpm\fi{}0.26$ ${\mathrm{cm}}^{2}$/sec at the melting point at atmospheric pressure. The results are discussed in relation to lead self-diffusion and the anomalous diffusers in lead.