Pseudopotential calculations of lattice distortions around impurities in simple metals

Second-order pseudopotential calculations are known to reproduce fairly well the structure and phonon spectra of many simple metals. The validity of the underlying assumption of linear screening for impurities with valences and core radii close to those of the host can be checked a posteriori and by comparing calculated properties with measurements on dilute alloys, and, especially, coherent elastic neutron scattering.