Knight Shift in Single-Crystal Mercury

The Knight shift of the ${\mathrm{Hg}}^{199}$ nucleus in oriented single crystals of mercury has been measured at $T=1.2\mathrm{}°$K. The isotropic shift given in terms of ${\nu }_{\mathrm{Hg}}$, the resonant frequency of the ${\mathrm{Hg}}^{199}$ nucleus in the metal, and ${\nu }_{\mathrm{D}}$, the resonant frequency of the deuterium nucleus, is $\frac{{\left({\nu }_{\mathrm{D}}\right)}_{293°\mathrm{K}}}{{\left({\nu }_{\mathrm{Hg}}\right)}_{1.2°\mathrm{K}}}=0.83856\mathrm{}\pm 0.00003$. The anisotropic Knight shift was measured and led to the result $\frac{(K_{\perp }-K_{\mathrm{II}})}{K_{\mathrm{iso}}}=7.8\mathrm{}\pm 0.3\%$. Field-dependent oscillations of the Knight shift were not seen. Theoretical equations for the oscillation amplitude are discussed for particular oscillation frequencies in Hg and Sn.