Threshold behavior of positronium formation in positron–alkali-metal scattering

A. V. Lugovskoy, R. Utamuratov, A. S. Kadyrov, A. T. Stelbovics, and I. Bray
Phys. Rev. A 87, 042708 – Published 29 April 2013

Abstract

We consider positron scattering on the alkali-metal atoms of Li, Na, and K at very low energies, where only the elastic scattering and positronium formation in the ground state are the two open channels. Utilizing the recently developed two-center convergent close-coupling method [Lugovskoy, Kadyrov, Bray, and Stelbovics, Phys. Rev. A 82, 062708 (2010)] we investigate the behavior of the cross sections as the impact energy goes to zero and demonstrate their convergence. The study sets quantitative benchmarks for any rigorous theoretical treatment of the collision problems.

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  • Received 1 February 2013

DOI:https://doi.org/10.1103/PhysRevA.87.042708

©2013 American Physical Society

Authors & Affiliations

A. V. Lugovskoy, R. Utamuratov, A. S. Kadyrov, A. T. Stelbovics, and I. Bray

  • ARC Centre for Antimatter-Matter Studies, Curtin University, G.P.O. Box U1987, Perth, Western Australia 6845, Australia

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Issue

Vol. 87, Iss. 4 — April 2013

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