(e,2e) simple ionization of CO2 by fast electron impact: use of three-center parameterized continuum wave function and Dyson orbitals

Abstract

The variation of the triple differential cross section of the (e,2e) simple ionization of CO2 with the direction of the ejected electron is studied. The calculations are performed in the frame of a perturbative first Born procedure, using a three-center Dyson type description for the 1πg bound electron and an approximate three-center continuum solution of the corresponding Schrödinger equation for a specific wave vector for the free ejected electron, which satisfies the correct asymptotic boundary condition up to the order . Empirical values for the screening of the three nuclei of the target and for the Sommerfeld parameters of the three-center Coulomb continuum function are introduced. The results are compared to existing experimental results and a theoretical result obtained by the same approach, using a Hartree–Fock Slater type orbital.