A semiempirical systematics on the electric field gradient eq in Be, Zn, Cd, In and Sn is obtained by comparing the lattice sum over screened ions eqscion with experimental data. At 4 K, eq can be described in these metals by eq≈A(1−γ∞)eqscion with A being negative and approximately constant.
The temperature dependence of the electric field gradient $\mathrm{eq}(T)$ in noncubic metals is calculated within a pseudopotential approach including the influence of lattice vibrations. The resulting $\mathrm{eq}(T)$ factorizes into a Debye-Waller factor and a lattice sum over screened ions. The accurately measured $\frac{\mathrm{eq}(T)}{\mathrm{eq}(0)}$ values for In, Cd, Zn, Sb, and Sn are quantitatively reproduced using known data for the lattice constants and for the mean-square atomic displacements.
Quadrupole moments of high-spin neutron states in 113,114,116Sn have been determined by means of the TDPAD method. Combining our results with previous data, quadrupole moments of isomers in 118,119,120Sn, 111Cd and a series of electric field gradients at the Sn or Cd site in various materials can be derived.
The relative differences of eight magnetic moments of 112− states in the Sn region are excellently reproduced by first-order core polarization effects calculated with the use of experimentally known energy denominators and occupation numbers.
