Positive-Ionic Mobility and a Hierarchy of Ions in Normal LiquidHe3

We have measured positive-ion mobilities in liquid ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ down to 3 mK. At 5 bar the low-temperature mobility is given by $\mu =(0.17-441\mathrm{}\ln T)\times {10}^{-6\mathrm{}}$ ${\mathrm{m}}^2$/V.s. At 27 bar two mobilities are seen, ${\mu }_{\mathrm{fast}}=(-12.85-6.21\mathrm{}\ln T)\times {10}^{-6\mathrm{}}$ ${\mathrm{m}}^2$/V.s and ${\mu }_{\mathrm{slow}}=(-6.26-3.64\mathrm{}\ln T)\times {10}^{-6\mathrm{}}$ ${\mathrm{m}}^2$/V.s. At temperatures near the discontinuity we see multiple mobilities and time-dependent conversion from one species of ion to another.