Ab initio adiabatic polarisation potentials for Be and Mg

Adiabatic polarisation potentials for e--Be and e--Mg scattering have been calculated using matrix Hartree-Fock calculations with extended Gaussian basis sets including diffuse functions. It is found that the adiabatic polarisation potentials are much more attractive than the potentials that have been used recently to study low-energy shape resonances in these systems. (author)