Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi

Autores
Montanari, Claudia Carmen; Mitnik, Dario Marcelo; Archubi, Claudio Darío; Miraglia, Jorge Esteban
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a theoretical study on the energy loss of protons in wolframium by calculating target fully relativistic wave functions and binding energies. The HULLAC code is employed to obtain numerical solutions of the Dirac equation. We use the shellwise local plasma approximation SLPA to evaluate the different moments of the energy loss. The partial contribution of each subshell of target electrons is calculated separately, including the screening among the electrons of the same binding energy. We pay special attention to the role of the outer 4f shell and the screening between electrons of near subshells i.e., the 5p and 4f electrons. Results for stopping and straggling cross sections are compared to the experimental data available. Our calculations describe rather well the stopping measurements around the maximum and for very high energies, but overestimate the data for impact energies around 1 MeV. We find that the SLPA results tend clearly to Bethe limit, but show a systematic overestimation in the energy region of 1 - 2 MeV. This overestimation may indicate the presence of other mechanisms included neither in the SLPA nor in Bethe formulations. We also present results for the stopping number of W, Au, Pb, and Bi which follow quite well the Lindhard scaling. A theoretical mean excitation energy IW=710 eV is obtained, in good agreement with the suggested value of 727.30 eV. Theoretical mean excitation energies for Au, Pb, and Bi are also presented, which are in good agreement with the experimental ones.
Fil: Montanari, Claudia Carmen. 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; Argentina
Fil: 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; Argentina
Fil: Archubi, Claudio Darío. 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; Argentina
Fil: Miraglia, Jorge Esteban. 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; Argentina
Materia
Wolframium
Energy-Loss
Fully-Relativistic
Local-Plasma-Approximation
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:11336/25056
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/25056
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and BiMontanari, Claudia CarmenMitnik, Dario MarceloArchubi, Claudio DaríoMiraglia, Jorge EstebanWolframiumEnergy-LossFully-RelativisticLocal-Plasma-Approximationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a theoretical study on the energy loss of protons in wolframium by calculating target fully relativistic wave functions and binding energies. The HULLAC code is employed to obtain numerical solutions of the Dirac equation. We use the shellwise local plasma approximation SLPA to evaluate the different moments of the energy loss. The partial contribution of each subshell of target electrons is calculated separately, including the screening among the electrons of the same binding energy. We pay special attention to the role of the outer 4f shell and the screening between electrons of near subshells i.e., the 5p and 4f electrons. Results for stopping and straggling cross sections are compared to the experimental data available. Our calculations describe rather well the stopping measurements around the maximum and for very high energies, but overestimate the data for impact energies around 1 MeV. We find that the SLPA results tend clearly to Bethe limit, but show a systematic overestimation in the energy region of 1 - 2 MeV. This overestimation may indicate the presence of other mechanisms included neither in the SLPA nor in Bethe formulations. We also present results for the stopping number of W, Au, Pb, and Bi which follow quite well the Lindhard scaling. A theoretical mean excitation energy IW=710 eV is obtained, in good agreement with the suggested value of 727.30 eV. Theoretical mean excitation energies for Au, Pb, and Bi are also presented, which are in good agreement with the experimental ones.Fil: Montanari, Claudia Carmen. 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: 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: Archubi, Claudio Darío. 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: Miraglia, Jorge Esteban. 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; ArgentinaAmerican Physical Society2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/25056Montanari, Claudia Carmen; Mitnik, Dario Marcelo; Archubi, Claudio Darío; Miraglia, Jorge Esteban; Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 80; 1; 12-2009; 1-6; 0129011050-2947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.80.012901info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.80.012901info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:34:03Zoai:ri.conicet.gov.ar:11336/25056instacron: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:34982025-09-29 10:34:03.432CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
title Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
spellingShingle Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
Montanari, Claudia Carmen
Wolframium
Energy-Loss
Fully-Relativistic
Local-Plasma-Approximation
title_short Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
title_full Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
title_fullStr Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
title_full_unstemmed Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
title_sort Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi
dc.creator.none.fl_str_mv Montanari, Claudia Carmen
Mitnik, Dario Marcelo
Archubi, Claudio Darío
Miraglia, Jorge Esteban
author Montanari, Claudia Carmen
author_facet Montanari, Claudia Carmen
Mitnik, Dario Marcelo
Archubi, Claudio Darío
Miraglia, Jorge Esteban
author_role author
author2 Mitnik, Dario Marcelo
Archubi, Claudio Darío
Miraglia, Jorge Esteban
author2_role author
author
author
dc.subject.none.fl_str_mv Wolframium
Energy-Loss
Fully-Relativistic
Local-Plasma-Approximation
topic Wolframium
Energy-Loss
Fully-Relativistic
Local-Plasma-Approximation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a theoretical study on the energy loss of protons in wolframium by calculating target fully relativistic wave functions and binding energies. The HULLAC code is employed to obtain numerical solutions of the Dirac equation. We use the shellwise local plasma approximation SLPA to evaluate the different moments of the energy loss. The partial contribution of each subshell of target electrons is calculated separately, including the screening among the electrons of the same binding energy. We pay special attention to the role of the outer 4f shell and the screening between electrons of near subshells i.e., the 5p and 4f electrons. Results for stopping and straggling cross sections are compared to the experimental data available. Our calculations describe rather well the stopping measurements around the maximum and for very high energies, but overestimate the data for impact energies around 1 MeV. We find that the SLPA results tend clearly to Bethe limit, but show a systematic overestimation in the energy region of 1 - 2 MeV. This overestimation may indicate the presence of other mechanisms included neither in the SLPA nor in Bethe formulations. We also present results for the stopping number of W, Au, Pb, and Bi which follow quite well the Lindhard scaling. A theoretical mean excitation energy IW=710 eV is obtained, in good agreement with the suggested value of 727.30 eV. Theoretical mean excitation energies for Au, Pb, and Bi are also presented, which are in good agreement with the experimental ones.
Fil: Montanari, Claudia Carmen. 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; Argentina
Fil: 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; Argentina
Fil: Archubi, Claudio Darío. 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; Argentina
Fil: Miraglia, Jorge Esteban. 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; Argentina
description We present a theoretical study on the energy loss of protons in wolframium by calculating target fully relativistic wave functions and binding energies. The HULLAC code is employed to obtain numerical solutions of the Dirac equation. We use the shellwise local plasma approximation SLPA to evaluate the different moments of the energy loss. The partial contribution of each subshell of target electrons is calculated separately, including the screening among the electrons of the same binding energy. We pay special attention to the role of the outer 4f shell and the screening between electrons of near subshells i.e., the 5p and 4f electrons. Results for stopping and straggling cross sections are compared to the experimental data available. Our calculations describe rather well the stopping measurements around the maximum and for very high energies, but overestimate the data for impact energies around 1 MeV. We find that the SLPA results tend clearly to Bethe limit, but show a systematic overestimation in the energy region of 1 - 2 MeV. This overestimation may indicate the presence of other mechanisms included neither in the SLPA nor in Bethe formulations. We also present results for the stopping number of W, Au, Pb, and Bi which follow quite well the Lindhard scaling. A theoretical mean excitation energy IW=710 eV is obtained, in good agreement with the suggested value of 727.30 eV. Theoretical mean excitation energies for Au, Pb, and Bi are also presented, which are in good agreement with the experimental ones.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
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/11336/25056
Montanari, Claudia Carmen; Mitnik, Dario Marcelo; Archubi, Claudio Darío; Miraglia, Jorge Esteban; Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 80; 1; 12-2009; 1-6; 012901
1050-2947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/25056
identifier_str_mv Montanari, Claudia Carmen; Mitnik, Dario Marcelo; Archubi, Claudio Darío; Miraglia, Jorge Esteban; Energy loss of protons in Wolframiun using fully relativistic binding energies and wave functions, and mean excitation energies of W, Au, Pb and Bi; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 80; 1; 12-2009; 1-6; 012901
1050-2947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.80.012901
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.80.012901
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
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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