Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface

Autores
Iglesias Garcia, Adalberto de Jesus; Garcia, Evelina Andrea; Goldberg, Edith Catalina
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The very high neutral fractions measured in He+ scattered by graphitelike surfaces, at intermediate incoming energies (1 keV Fil: Iglesias Garcia, Adalberto de Jesus. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; Argentina
Fil: Garcia, Evelina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Materia
Hopg
Hellium
Dynamic
Charge Transfer
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/6543
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/6543
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surfaceIglesias Garcia, Adalberto de JesusGarcia, Evelina AndreaGoldberg, Edith CatalinaHopgHelliumDynamicCharge Transferhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The very high neutral fractions measured in He+ scattered by graphitelike surfaces, at intermediate incoming energies (1 keV <Ein< 6 keV), cannot be explained only by the resonance of the He ionization level with the valence band states of the surface. Excited configurations (1s2s) and (1s2p) appear as possible resonant neutralization channels together with the ground state one (1s2). We develop, in this work, a time-dependent quantum-mechanical calculation of the charge-transfer process in He+/HOPG collision, where the resonant neutralization to the ground and first excited states of He is taken into account. We use an Anderson Hamiltonian projected on the electronic configurations of the projectile atom which are energetically favorable for the charge-exchange process. Thus, an exhaustive analysis of different possible approximations to the neutralization of He+ is performed: the typical neutralization to the ground state by either neglecting or not the electron spin and finally the one including excited configurations. Our results reproduce the observed experimental trends only when excited configurations (1s2s) and (1s2p) are involved in the charge exchange between the ion and the surface.Fil: Iglesias Garcia, Adalberto de Jesus. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; ArgentinaFil: Garcia, Evelina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaAmerican Physical Society2013-02info: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/11336/6543Iglesias Garcia, Adalberto de Jesus; Garcia, Evelina Andrea; Goldberg, Edith Catalina; Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface; American Physical Society; Physical Review B; 87; 7; 2-2013; 75434-754340163-1829enginfo:eu-repo/semantics/altIdentifier/url/http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.075434info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.87.075434info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:56:35Zoai:ri.conicet.gov.ar:11336/6543instacron: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:34982025-09-03 09:56:35.458CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
title Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
spellingShingle Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
Iglesias Garcia, Adalberto de Jesus
Hopg
Hellium
Dynamic
Charge Transfer
title_short Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
title_full Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
title_fullStr Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
title_full_unstemmed Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
title_sort Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface
dc.creator.none.fl_str_mv Iglesias Garcia, Adalberto de Jesus
Garcia, Evelina Andrea
Goldberg, Edith Catalina
author Iglesias Garcia, Adalberto de Jesus
author_facet Iglesias Garcia, Adalberto de Jesus
Garcia, Evelina Andrea
Goldberg, Edith Catalina
author_role author
author2 Garcia, Evelina Andrea
Goldberg, Edith Catalina
author2_role author
author
dc.subject.none.fl_str_mv Hopg
Hellium
Dynamic
Charge Transfer
topic Hopg
Hellium
Dynamic
Charge Transfer
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The very high neutral fractions measured in He+ scattered by graphitelike surfaces, at intermediate incoming energies (1 keV <Ein< 6 keV), cannot be explained only by the resonance of the He ionization level with the valence band states of the surface. Excited configurations (1s2s) and (1s2p) appear as possible resonant neutralization channels together with the ground state one (1s2). We develop, in this work, a time-dependent quantum-mechanical calculation of the charge-transfer process in He+/HOPG collision, where the resonant neutralization to the ground and first excited states of He is taken into account. We use an Anderson Hamiltonian projected on the electronic configurations of the projectile atom which are energetically favorable for the charge-exchange process. Thus, an exhaustive analysis of different possible approximations to the neutralization of He+ is performed: the typical neutralization to the ground state by either neglecting or not the electron spin and finally the one including excited configurations. Our results reproduce the observed experimental trends only when excited configurations (1s2s) and (1s2p) are involved in the charge exchange between the ion and the surface.
Fil: Iglesias Garcia, Adalberto de Jesus. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; Argentina
Fil: Garcia, Evelina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Goldberg, Edith Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
description The very high neutral fractions measured in He+ scattered by graphitelike surfaces, at intermediate incoming energies (1 keV <Ein< 6 keV), cannot be explained only by the resonance of the He ionization level with the valence band states of the surface. Excited configurations (1s2s) and (1s2p) appear as possible resonant neutralization channels together with the ground state one (1s2). We develop, in this work, a time-dependent quantum-mechanical calculation of the charge-transfer process in He+/HOPG collision, where the resonant neutralization to the ground and first excited states of He is taken into account. We use an Anderson Hamiltonian projected on the electronic configurations of the projectile atom which are energetically favorable for the charge-exchange process. Thus, an exhaustive analysis of different possible approximations to the neutralization of He+ is performed: the typical neutralization to the ground state by either neglecting or not the electron spin and finally the one including excited configurations. Our results reproduce the observed experimental trends only when excited configurations (1s2s) and (1s2p) are involved in the charge exchange between the ion and the surface.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/6543
Iglesias Garcia, Adalberto de Jesus; Garcia, Evelina Andrea; Goldberg, Edith Catalina; Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface; American Physical Society; Physical Review B; 87; 7; 2-2013; 75434-75434
0163-1829
url http://hdl.handle.net/11336/6543
identifier_str_mv Iglesias Garcia, Adalberto de Jesus; Garcia, Evelina Andrea; Goldberg, Edith Catalina; Role of He excited configurations in the neutralization of He+ ions colliding with a HOPG surface; American Physical Society; Physical Review B; 87; 7; 2-2013; 75434-75434
0163-1829
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/prb/abstract/10.1103/PhysRevB.87.075434
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.87.075434
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
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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 13.13397

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