Surface-Barrier Analysis for Rhenium from Periodic Deviations in the Thermionic Schottky Effect

Abstract

A precise experimental determination of the Herring-Nichols surface-reflection coefficient $\ensuremath{\mu}$ has been made from periodic deviations in the thermionic Schottky effect for rhenium. The value of $\ensuremath{\mu}=0.29\mathrm{exp}(i0.42)$ is in good agreement with a Sommerfeld box model in which the valence electrons of the atoms near the metallic surface are assumed to be free.