Hyperspherical Close-Coupling Calculations for Charge Transfer Cross Sections in Si⁴⁺ + H(D) and Be⁴⁺ + H Collisions at Low Energies

Abstract

Total and partial electron capture cross sections are calculated for Si⁴⁺ + H(1s)/D(1s) collisions from 1 meV amu-1 to 1 keV amu-1, and for Be⁴⁺ + H(1s) collisions from 2.5 eV amu-1 up to 1 keV amu-1, using the recently developed hyperspherical close-coupling (HSCC) approach. For both systems, our results are in good agreement with calculations based on the molecular orbital expansion method in reaction coordinates (RC). For Si⁴⁺ + D(1s) our total charge transfer cross sections agree well with experiment, but not the partial cross sections. For Be⁴⁺ + H, we show that partial wave cross sections from the RC method have more oscillatory structures than those from the HSCC method, even though the total cross sections agree. In comparison with the RC method, the HSCC approach does not require the introduction of any ad hoc external parameters in the formulation.

Department(s)

Physics

Keywords and Phrases

Beryllium; Charge Transfer; Electrons; Hamiltonians; Hydrogen; Numerical Methods; Positive Ions; Silicon, Hyperspherical Close-Coupling Approach; Molecular Orbital Expansion Method, Molecular Dynamics

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2003 IOP Publishing Ltd., All rights reserved.

Publication Date

01 Aug 2003

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