Angular distributions for near-threshold (e,2e) processes for Li and Mg

Cheng Pan and Anthony F. Starace
Phys. Rev. A 47, 2389 – Published 1 March 1993
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Abstract

Distorted-wave calculations of the triply differential cross sections for electron-impact ionization of Li and Mg are presented for the coplanar, θ12=π geometry in which the final-state electrons share 2 eV of excess energy equally. Our theoretical approach, described in detail elsewhere [C. Pan and A. F. Starace, Phys. Rev. A 45, 4588 (1992)], employs a partial-wave expansion of initial- and final-state wave functions, treats direct and exchange interactions of initial and final electrons with the target core, and treats the final-state interaction between the two continuum electrons by a screening potential. Li and Mg targets are found to have more complex (e,2e) angular distributions than either H or He targets, stemming in large part from significant p-wave and higher one-electron phase shifts in the former elements.

  • Received 23 October 1992

DOI:https://doi.org/10.1103/PhysRevA.47.2389

©1993 American Physical Society

Authors & Affiliations

Cheng Pan

  • Department of Physics and Astronomy, The University of Nebraska, Lincoln, Nebraska 68588-0111

Anthony F. Starace

  • Joint Institute for Laboratory Astrophysics, University of Colorado National Institute of Standards and Technology, Boulder, Colorado 80309-0440

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Vol. 47, Iss. 3 — March 1993

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