${}^3$He impurities and mass transport through solid ${}^4$He: a universal temperature dependence and flux extinction

Ye. Vekhov, W. J. Mullin, R. B. Hallock

The flux, $F$, carried by solid ${}^4$He in the range $25.6-26.3$ bar rises with falling temperature and at a temperature $T_d$ the flux decreases toward zero. We study $F$ as a fu…