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Open AccessFeature PaperArticle

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
Atoms 2017, 5(2), 17;
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)
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
MDPI and ACS Style

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

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