Comparison of hyperspherical versus common-reaction-coordinate close-coupling methods for ion-atom collisions at low energies

Anh-Thu Le, C. D. Lin, L. F. Errea, L. Méndez, A. Riera, and B. Pons
Phys. Rev. A 69, 062703 – Published 3 June 2004

Abstract

We present detailed comparisons between the two quantal approaches—hyperspherical close-coupling and common-reaction-coordinate close-coupling methods—on an exemplary case of He2++H(1s) collisions at center-of-mass energy from 20eV up to 1.6keV. It is shown that the partial-wave charge-transfer cross sections from the two approaches agree very well at low energy below 200eV down to 30eV. This good agreement is a strong indication of the validity of both methods. The small difference at very low energies and the convergence with respect to the number of channels in both approaches at higher energies are also discussed.

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  • Received 22 December 2003

DOI:https://doi.org/10.1103/PhysRevA.69.062703

©2004 American Physical Society

Authors & Affiliations

Anh-Thu Le1,*, C. D. Lin1, L. F. Errea2, L. Méndez2, A. Riera2, and B. Pons3

  • 1Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506, USA
  • 2Laboratorio Asociado al CIEMAT de Física Atómica y Molecular en Plasmas de Fusión, Departamento de Química Universidad Autónoma de Madrid, 28048 Madrid, Spain
  • 3Centre Lasers Intenses et Applications (UMR CNRS), Université de Bordeaux I, 351 Cours de Libération, 33405 Talence Cedex, France

  • *Electronic address: atle@phys.ksu.edu

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Vol. 69, Iss. 6 — June 2004

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