A study of the pseudostate-close-coupling method using a non-orthogonal Laguerre-L2 basis for electron-helium scattering

Abstract

We present the pseudostate-close-coupling method using a non-orthogonal Laguerre-L2 basis function for the calculations of electron-helium scattering. Our method is a frozen-core model of the target in which one of the electrons is restricted to the 1s He+ orbital, as has been used with great success recently. We demonstrate its applicability at a range of projectile energies of 5 to 50 eV to scattering from the ground state to n ≤ 2 states. Generally good agreement with experiments and the other calculations is obtained with the available differential and total cross-sections. On occasion, there is not good agreement with experiments, particularly at the forward and backward angles for projectile energy in the range 30 to 50 eV.