Elastic scattering of positronium: Application of the confined variational method

Junyi Zhang; Zong-Chao Yan; Udo Schwingenschlögl

doi:10.1209/0295-5075/99/43001

Elastic scattering of positronium: Application of the confined variational method

Junyi Zhang, Zong-Chao Yan, Udo Schwingenschlögl

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11 Scopus citations

Abstract

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. © Copyright EPLA, 2012.

Original language	English (US)
Pages (from-to)	43001
Journal	EPL (Europhysics Letters)
Volume	99
Issue number	4
DOIs	https://doi.org/10.1209/0295-5075/99/43001
State	Published - Aug 28 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors are thankful for the computational resources provided by ACEnet of Canada and HPC of KAUST. Z-CY was supported by NSERC of Canada and in part by the Chinese Academy of Sciences CAS/SAFEA International Partnership Program for Creative Research Teams.

ASJC Scopus subject areas

General Physics and Astronomy

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AU - Yan, Zong-Chao

AU - Schwingenschlögl, Udo

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N2 - 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. © Copyright EPLA, 2012.

AB - 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. © Copyright EPLA, 2012.

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Elastic scattering of positronium: Application of the confined variational method

Abstract

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