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Atoms 2017, 5(2), 17; doi:10.3390/atoms5020017

P-Wave Positron-Hydrogen Scattering, Annihilation, and Positronium Formation

Heliophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
Academic Editor: James Babb
Received: 10 January 2017 / Revised: 23 March 2017 / Accepted: 7 April 2017 / Published: 18 April 2017
(This article belongs to the Section Atomic, Molecular and Nuclear Spectroscopy and Collisions)
View Full-Text   |   Download PDF [244 KB, uploaded 20 April 2017]

Abstract

In a previous paper (Bhatia A.K. 2016), a hybrid theory for the scattering of positrons from hydrogen atoms was applied to calculate S-wave phase shifts, annihilation, and positronium formation cross sections. This approach is now being applied to calculate P-wave positron-hydrogen scattering. The present results, obtained using short-range correlation functions along with long-range correlations in the Schrödinger equation at the same time, agree very well with the results obtained in an earlier calculation by Bhatia et al. (1974), using the Feshbach projection operator formalism. In these earlier calculations, the correction due to the long-range correlations was applied to the variational results. In spite of the fact that this ad hoc correction destroyed the variational bound, the final results have been considered accurate. Annihilation cross-sections, positronium formation cross-sections, calculated in the distorted-wave approximation, are also presented. View Full-Text
Keywords: positron scattering; annihilation; positronium formation positron scattering; annihilation; positronium formation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bhatia, A.K. P-Wave Positron-Hydrogen Scattering, Annihilation, and Positronium Formation. Atoms 2017, 5, 17.

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