Target correlation and polarization effects on the electron impact ionization of He atoms

    Authors

    H. P. Saha

    Comments

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    Abbreviated Journal Title

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

    Keywords

    DIFFERENTIAL CROSS-SECTIONS; DISTORTED-WAVE CALCULATION; NEAR-THRESHOLD; ANGULAR-DISTRIBUTIONS; 2ND-ORDER EXCHANGE; HYDROGEN-ATOMS; HELIUM; SCATTERING; 2E; APPROXIMATION; Optics; Physics, Atomic, Molecular & Chemical

    Abstract

    We have reported here the results of our investigation of the effects of electron correlation and polarization of the target in the incident channel on the electron impact ionization of the helium atom. The triple differential cross section (TDCS) is calculated for 28.6 eV incident electron energy for the case when the two final-state outgoing electrons share 4.0 eV excess energy equally and unequally and leave in the opposite direction. The electron correlation and polarization of the He-target in the initial state are considered completely ab initio using the recently extended multiconfiguration Hartree-Fock method. The electron correlation between the two outgoing electrons in the final state is included through the variationally determined screening potential. It is found that both target correlation and polarization in the incident channel play an important role; the polarization has larger effect on the TDCS than the target correlation. We compared our results with available experimental and theoretical data.

    Journal Title

    Journal of Physics B-Atomic Molecular and Optical Physics

    Volume

    44

    Issue/Number

    6

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    7

    WOS Identifier

    WOS:000288249700006

    ISSN

    0953-4075

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