Fully Differential Cross Sections for C⁶⁺ Single Ionization of Helium

Abstract

We have examined the fully differential cross section (FDCS) for single ionization of helium by a 2 MeV amu-1 C6+ ion. The FDCS is presented for a variety of momentum transfers and ejected electron energies. The theoretical model we use, labelled 3DW-EIS (three-body distorted wave-eikonal initial state), treats the collision as a three-body problem (projectile, active electron, residual ion). In the final state, each two-particle pair is treated exactly and the initial state is an eikonal state which contains the proper asymptotic forms of the projectile-target ion and projectile-electron interactions. Most importantly, the final state of the ejected electron is treated as a distorted wave calculated numerically from the static Hartree-Fock potential for the ion. Our theoretical results are compared with both absolute experimental measurements and previous theoretical calculations. It is shown that the 3DW-EIS results are in good agreement with experiment for all cases except large momentum transfer and low ejected-electron energies.

Department(s)

Physics

Sponsor(s)

German Research Association
National Science Foundation (U.S.)

Keywords and Phrases

Approximation theory; Electrons; Ionization; Perturbation techniques; Projectiles; Scattering; Spectrometers; Fully differential cross section (FDCS); Momentum transfer; Projectile energy; Helium

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Institute of Physics - IOP Publishing, All rights reserved.

Publication Date

01 Apr 2004

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