Discrepancy between theory and experiment in double ionization of helium by fast electrons

We compute fully differential cross sections for double ionization of helium by electrons, within the high-impact-energy and low-momentum transfer regimes, using the generalized Sturmian functions approach. Our results are converged relative to the total angular momentum and variable domain size. Th...

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Detalles Bibliográficos
Autores: Ambrosio, Marcelo José, Colavecchia, Flavio Dario, Mitnik, Dario Marcelo, Gasaneo, Gustavo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/16698
Acceso en línea:http://hdl.handle.net/11336/16698
Access Level:acceso abierto
Palabra clave:Double Ionization
Helium
Discrepancy
Theory
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Discrepancy between theory and experiment in double ionization of helium by fast electronsAmbrosio, Marcelo JoséColavecchia, Flavio DarioMitnik, Dario MarceloGasaneo, GustavoDouble IonizationHeliumDiscrepancyTheoryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We compute fully differential cross sections for double ionization of helium by electrons, within the high-impact-energy and low-momentum transfer regimes, using the generalized Sturmian functions approach. Our results are converged relative to the total angular momentum and variable domain size. The method shows very good agreement with convergent close coupling calculations performed by Kheifets et al. [J. Phys. B 32, 5047 (1999), 10.1088/0953-4075/32/21/301] for all ejection angles for the two electron emission energies considered in the experiments reported in that contribution. Both theoretical methods provide fully differential cross sections that require the same upscaling factors to compare with experimental data and are based on a first-order Born model for the projectile-target interaction. Since that reference was published, there were several theoretical efforts to account for the absolute scale of the experimental results, but agreement in the cross-section magnitude was not achieved even between theories. With the present contribution we conclude that the first-order Born model is now adequately solved, shifting the magnitude controversy towards either the experimental data and/or the addition of higher degrees of projectile-target interaction to the calculation.Fil: Ambrosio, Marcelo José. Universidad Nacional del Sur. Departamento de Física; Argentina. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Colavecchia, Flavio Dario. Comisión Nacional de Energíâ­a Atómica. Gerencia del Area Investigación y Aplicaciones No Nucleares. Gerencia de Física (centro Atómico Balseiro). División Colisiones Atómicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mitnik, Dario Marcelo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Gasaneo, Gustavo. Universidad Nacional del Sur. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Physical Society2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16698Ambrosio, Marcelo José; Colavecchia, Flavio Dario; Mitnik, Dario Marcelo; Gasaneo, Gustavo; Discrepancy between theory and experiment in double ionization of helium by fast electrons; American Physical Society; Physical Review A: Atomic, Molecular And Optical Physics; 91; 1; 1-2015; 012704-012704, 1-41050-2947enginfo:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/pra/abstract/10.1103/PhysRevA.91.012704info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.91.012704info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:40:05Zoai:ri.conicet.gov.ar:11336/16698instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:40:05.511CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Discrepancy between theory and experiment in double ionization of helium by fast electrons
title Discrepancy between theory and experiment in double ionization of helium by fast electrons
spellingShingle Discrepancy between theory and experiment in double ionization of helium by fast electrons
Ambrosio, Marcelo José
Double Ionization
Helium
Discrepancy
Theory
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Discrepancy between theory and experiment in double ionization of helium by fast electrons
title_full Discrepancy between theory and experiment in double ionization of helium by fast electrons
title_fullStr Discrepancy between theory and experiment in double ionization of helium by fast electrons
title_full_unstemmed Discrepancy between theory and experiment in double ionization of helium by fast electrons
title_sort Discrepancy between theory and experiment in double ionization of helium by fast electrons
dc.creator.none.fl_str_mv Ambrosio, Marcelo José
Colavecchia, Flavio Dario
Mitnik, Dario Marcelo
Gasaneo, Gustavo
author Ambrosio, Marcelo José
author_facet Ambrosio, Marcelo José
Colavecchia, Flavio Dario
Mitnik, Dario Marcelo
Gasaneo, Gustavo
author_role author
author2 Colavecchia, Flavio Dario
Mitnik, Dario Marcelo
Gasaneo, Gustavo
author2_role author
author
author
dc.subject.none.fl_str_mv Double Ionization
Helium
Discrepancy
Theory
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Double Ionization
Helium
Discrepancy
Theory
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description We compute fully differential cross sections for double ionization of helium by electrons, within the high-impact-energy and low-momentum transfer regimes, using the generalized Sturmian functions approach. Our results are converged relative to the total angular momentum and variable domain size. The method shows very good agreement with convergent close coupling calculations performed by Kheifets et al. [J. Phys. B 32, 5047 (1999), 10.1088/0953-4075/32/21/301] for all ejection angles for the two electron emission energies considered in the experiments reported in that contribution. Both theoretical methods provide fully differential cross sections that require the same upscaling factors to compare with experimental data and are based on a first-order Born model for the projectile-target interaction. Since that reference was published, there were several theoretical efforts to account for the absolute scale of the experimental results, but agreement in the cross-section magnitude was not achieved even between theories. With the present contribution we conclude that the first-order Born model is now adequately solved, shifting the magnitude controversy towards either the experimental data and/or the addition of higher degrees of projectile-target interaction to the calculation.
publishDate 2015
dc.date.none.fl_str_mv 2015-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/16698
Ambrosio, Marcelo José; Colavecchia, Flavio Dario; Mitnik, Dario Marcelo; Gasaneo, Gustavo; Discrepancy between theory and experiment in double ionization of helium by fast electrons; American Physical Society; Physical Review A: Atomic, Molecular And Optical Physics; 91; 1; 1-2015; 012704-012704, 1-4
1050-2947
url http://hdl.handle.net/11336/16698
identifier_str_mv Ambrosio, Marcelo José; Colavecchia, Flavio Dario; Mitnik, Dario Marcelo; Gasaneo, Gustavo; Discrepancy between theory and experiment in double ionization of helium by fast electrons; American Physical Society; Physical Review A: Atomic, Molecular And Optical Physics; 91; 1; 1-2015; 012704-012704, 1-4
1050-2947
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/pra/abstract/10.1103/PhysRevA.91.012704
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.91.012704
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15.812429

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