Accuracy of local exchange in the calculation of continuum wavefunctions
Abbreviated Journal Title
J. Phys. B-At. Mol. Opt. Phys.
ELECTRON-IMPACT IONIZATION; DIFFERENTIAL CROSS-SECTIONS; E, 2E; COLLISIONS; HARTREE-FOCK; POLARIZED ELECTRONS; LOW ENERGIES; SCATTERING; XENON; ARGON; ATOMS; Optics; Physics, Atomic, Molecular & Chemical
It is well known that electron exchange can-play an important role in electron impact elastic, inelastic and ionization scattering from atoms and molecules. The proper theoretical treatment of exchange yields an inhomogeneous differential equation with a non-local exchange operator. To simplify the calculation, a local approximation is often made for this non-local operator. In this paper, we examine the accuracy of this approximation for the calculation of elastic scattering continuum waves in the presence of an argon ion with a single vacancy in the p-shell. It is found that one can. reliably use the local exchange approximation for ionization leading to s-state vacancies but not p state vacancies.
Journal of Physics B-Atomic Molecular and Optical Physics
"Accuracy of local exchange in the calculation of continuum wavefunctions" (2002). Faculty Bibliography 2000s. 3085.