Integral-differential equations approach to atomic three-body systems

  • Authors:
  • Renat A. Sultanov;Dennis Guster

  • Affiliations:
  • Department of Chemistry, University of Nevada Las Vegas (UNLV), 4505 Maryland Parkway, Box 454003, Las Vegas, NV;St. Cloud State University, Business Computing Research Laboratory (BCRL), St. Cloud, MN

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2003

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Abstract

Three-charge-particle quantum systems with arbitrary masses are treated by a general formalism based on a coordinate-space integral-differential Faddeev-Hahn-type equation. To solve these equations we expand the wave function components in terms of bound states in initial and final channels and project these equations on these bound states as in the close-coupling method used in Schrödinger equation. After a proper angular momentum projection, a set of coupled integral-differential equations for the unknown expansion coefficients result, which are solved numerically by discretization for the calculation of both bound state and rearrangement scattering. In this work the formalism is employed to study atomic and muonic three-body systems like negative ion of positronium Ps- = (e+e-e-), positive ion of hydrogen molecule H2+, muonic molecules dtµ and ddµ, and also low-energy charge-transfer reaction for muonium production. Satisfactory results are obtained for all these cases. Comparison with results of other works and details of the numerical scheme are presented.