Thermal boundary resistance to solid helium, hydrogen, deuterium, and neon

Abstract

Measurements have been made in the temperature range 1-3 K of the thermal boundary resistance $R_B$ between copper and solid ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, ${\mathrm{H}}_2$, ${\mathrm{D}}_2$, and Ne. The data for solid Ne agree within ≅20% with the acoustic mismatch theory. However, the magnitude of $R_B$ to solid ${\mathrm{H}}_2$ or ${\mathrm{D}}_2$ is found to be anomalously small, as for liquid or solid He, which is consistent with the earlier, complementary measurements of phonon reflection coefficients by Buechner and Maris.