Volume 99, Number 4, August 2012
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||29 August 2012|
Elastic scattering of positronium: Application of the confined variational method
1 Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900, Saudi Arabia
2 Center for Cold Atom Physics, Chinese Academy of Sciences - Wuhan 430071, China
3 Department of Physics, University of New Brunswick - Fredericton, New Brunswick, Canada E3B 5A3
Received: 6 June 2012
Accepted: 25 July 2012
We demonstrate for the first time that the phase shift in elastic positronium-atom scattering can be precisely determined by the confined variational method, in spite of the fact that the Hamiltonian includes an unphysical confining potential acting on the center of mass of the positron and one of the atomic electrons. As an example, we study the S-wave elastic scattering for the positronium-hydrogen scattering system, where the existing ∼4% discrepancy between the Kohn variational calculation and the R-matrix calculation is resolved.
PACS: 34.80.Bm – Elastic scattering / 34.80.Uv – Positron scattering / 03.65.Nk – Scattering theory
© EPLA, 2012
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