Accuracy of local exchange in the calculation of continuum wavefunctions

    Authors

    D. A. Biava; K. Bartschat; H. P. Saha;D. H. Madison

    Comments

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    Abbreviated Journal Title

    J. Phys. B-At. Mol. Opt. Phys.

    Keywords

    ELECTRON-IMPACT IONIZATION; DIFFERENTIAL CROSS-SECTIONS; E, 2E; COLLISIONS; HARTREE-FOCK; POLARIZED ELECTRONS; LOW ENERGIES; SCATTERING; XENON; ARGON; ATOMS; Optics; Physics, Atomic, Molecular & Chemical

    Abstract

    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 Title

    Journal of Physics B-Atomic Molecular and Optical Physics

    Volume

    35

    Issue/Number

    24

    Publication Date

    1-1-2002

    Document Type

    Article

    Language

    English

    First Page

    5121

    Last Page

    5130

    WOS Identifier

    WOS:000180629500017

    ISSN

    0953-4075

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