Evidence of two-channel distortion effects in positronium formation reactions

The formation of ground-state positronium in collisions of positrons on hydrogen-like atoms is considered. In previous theoretical works, two-centre distorted wavefunctions were employed to approximate either the initial or the final channel. Here we report results obtained by means of the eikonal f...

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Detalles Bibliográficos
Publicado: 2004
Materias:
Impact energy
Positroniums
Wavefunctions
Approximation theory
Charge transfer
Continuum mechanics
Electrodynamics
Electrons
Ground state
Isotopes
Protons
Quantum theory
High energy physics
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09534075_v37_n6_pL111_Macri
http://hdl.handle.net/20.500.12110/paper_09534075_v37_n6_pL111_Macri
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09534075_v37_n6_pL111_Macri
record_format dspace
spelling paper:paper_09534075_v37_n6_pL111_Macri2023-06-08T15:55:13Z Evidence of two-channel distortion effects in positronium formation reactions Impact energy Positroniums Wavefunctions Approximation theory Charge transfer Continuum mechanics Electrodynamics Electrons Ground state Isotopes Protons Quantum theory High energy physics The formation of ground-state positronium in collisions of positrons on hydrogen-like atoms is considered. In previous theoretical works, two-centre distorted wavefunctions were employed to approximate either the initial or the final channel. Here we report results obtained by means of the eikonal final state continuum distorted wave approximation for which asymptotically correct distorted wavefunctions are used for both the initial and final states of the scattering system. Comparison of the present theoretical total cross sections with experimental data reveals that distortion effects become important in both channels as the impact energy decreases. This work also shows that distorted-wave theories may be extended from their usual domain of high impact energies to lower ones. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09534075_v37_n6_pL111_Macri http://hdl.handle.net/20.500.12110/paper_09534075_v37_n6_pL111_Macri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Impact energy
Positroniums
Wavefunctions
Approximation theory
Charge transfer
Continuum mechanics
Electrodynamics
Electrons
Ground state
Isotopes
Protons
Quantum theory
High energy physics
spellingShingle Impact energy
Positroniums
Wavefunctions
Approximation theory
Charge transfer
Continuum mechanics
Electrodynamics
Electrons
Ground state
Isotopes
Protons
Quantum theory
High energy physics
Evidence of two-channel distortion effects in positronium formation reactions
topic_facet Impact energy
Positroniums
Wavefunctions
Approximation theory
Charge transfer
Continuum mechanics
Electrodynamics
Electrons
Ground state
Isotopes
Protons
Quantum theory
High energy physics
description The formation of ground-state positronium in collisions of positrons on hydrogen-like atoms is considered. In previous theoretical works, two-centre distorted wavefunctions were employed to approximate either the initial or the final channel. Here we report results obtained by means of the eikonal final state continuum distorted wave approximation for which asymptotically correct distorted wavefunctions are used for both the initial and final states of the scattering system. Comparison of the present theoretical total cross sections with experimental data reveals that distortion effects become important in both channels as the impact energy decreases. This work also shows that distorted-wave theories may be extended from their usual domain of high impact energies to lower ones.
title Evidence of two-channel distortion effects in positronium formation reactions
title_short Evidence of two-channel distortion effects in positronium formation reactions
title_full Evidence of two-channel distortion effects in positronium formation reactions
title_fullStr Evidence of two-channel distortion effects in positronium formation reactions
title_full_unstemmed Evidence of two-channel distortion effects in positronium formation reactions
title_sort evidence of two-channel distortion effects in positronium formation reactions
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09534075_v37_n6_pL111_Macri
http://hdl.handle.net/20.500.12110/paper_09534075_v37_n6_pL111_Macri
_version_ 1768545058904080384

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