Convergent close-coupling calculations of positron scattering from atomic carbon

Cross Sections for Electron Scattering from Cadmium: Theory and Experiment

“…In order to obtain an estimate of the total-ionization cross section, contributions from the DI and excitation auto-ionization of electrons in the closed 4d 10 shell have to be included. We use a recently developed computer program 56 for calculation of multielectron target wave functions using Laguerre basis expansion in the nonrelativistic approximation. To begin, all orbitals from 1s to 5s are obtained from Hartree-Fock (HF) 57 calculations for the ionic…”

“…These orbitals are obtained via a mixture of the previous HF calculations and ones generated using a Laguerre basis. 56 This one-electron basis is used to produce a set of multi-electron configurations and diagonalize the target Hamiltonian. A total of 1177 target states are generated, including both bound and continuum pseudo-states.…”

“…Non-relativistic Born cross sections are then calculated for excitations from the ground state to all these states. 56 From these calculations, estimates of the cross sections for DI of the 4d electrons and excitation auto-ionization are obtained. In the case of excitation auto-ionization, it is assumed that all target states produced with excitation energies greater than the 5s ionization potential but less than the 4d ionization potential are auto-ionizing.…”