Effective configurations in positron–molecule scattering

Abstract

In this work, we extend the effective configurations (EC) approach(Azevedo D L, da Silva A J R and Lima M A 2000 Phys. Rev. A61 042702) to positron scattering. EC are pseudo-eigenstates of the(N + 1)-bodycollision Hamiltonian. They provide a much more efficient description ofpolarization effects in scattering calculations by allowing considerable contractionof configuration spaces. As a result, significant computational time is saved.