Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels

Detalhes bibliográficos
Autor(a) principal: Shah, Chintan
Data de Publicação: 2019
Outros Autores: López-Urrutia, José R.Crespo, Gu, Ming Feng, Pfeifer, Thomas, Marques, José, Grilo, Filipe, Santos, José Paulo, Amaro, Pedro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/90034
Resumo: Deutsche Forschungsgemeinschaft (DFG) Project No. 266229290.
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spelling Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channelsatomic dataatomic processesline: formationmethods: laboratory: atomicplasmasX-rays: generalAstronomy and AstrophysicsSpace and Planetary ScienceDeutsche Forschungsgemeinschaft (DFG) Project No. 266229290.We determined relative X-ray photon emission cross sections in Fe xvii ions that were mono-energetically excited in an electron beam ion trap. Line formation for the 3s (3s-2p) and 3d (3d-2p) transitions of interest proceeds through dielectronic recombination (DR), direct electron-impact excitation (DE), resonant excitation (RE), and radiative cascades. By reducing the electron-energy spread to a sixth of that of previous works and increasing counting statistics by three orders of magnitude, we account for hitherto unresolved contributions from DR and the little-studied RE process to the 3d transitions, and also for cascade population of the 3s line manifold through forbidden states. We found good agreement with state-of-the-art many-body perturbation theory (MBPT) and the distorted-wave (DW) method for the 3s transition, while in the 3d transitions known discrepancies were confirmed. Our results show that DW calculations overestimate the 3d line emission due to DE by ∼20%. Inclusion of electron-electron correlation effects through the MBPT method in the DE cross-section calculations reduces this disagreement by ∼11%. The remaining ∼9% in 3d and ∼11% in 3s/3d discrepancies are consistent with those found in previous laboratory measurements, solar, and astrophysical observations. Meanwhile, spectral models of opacity, temperature, and turbulence velocity should be adjusted to these experimental cross sections to optimize the accuracy of plasma diagnostics based on these bright soft X-ray lines of Fe xvii.LIBPhys-UNLDF – Departamento de FísicaRUNShah, ChintanLópez-Urrutia, José R.CrespoGu, Ming FengPfeifer, ThomasMarques, JoséGrilo, FilipeSantos, José PauloAmaro, Pedro2019-12-17T23:30:53Z2019-08-202019-08-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/90034eng0004-637XPURE: 15239925https://doi.org/10.3847/1538-4357/ab2896info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-10T15:52:07ZPortal AgregadorONG
dc.title.none.fl_str_mv Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
title Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
spellingShingle Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
Shah, Chintan
atomic data
atomic processes
line: formation
methods: laboratory: atomic
plasmas
X-rays: general
Astronomy and Astrophysics
Space and Planetary Science
title_short Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
title_full Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
title_fullStr Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
title_full_unstemmed Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
title_sort Revisiting the Fe xvii Line Emission Problem: Laboratory Measurements of the 3s-2p and 3d-2p Line-formation Channels
author Shah, Chintan
author_facet Shah, Chintan
López-Urrutia, José R.Crespo
Gu, Ming Feng
Pfeifer, Thomas
Marques, José
Grilo, Filipe
Santos, José Paulo
Amaro, Pedro
author_role author
author2 López-Urrutia, José R.Crespo
Gu, Ming Feng
Pfeifer, Thomas
Marques, José
Grilo, Filipe
Santos, José Paulo
Amaro, Pedro
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv LIBPhys-UNL
DF – Departamento de Física
RUN
dc.contributor.author.fl_str_mv Shah, Chintan
López-Urrutia, José R.Crespo
Gu, Ming Feng
Pfeifer, Thomas
Marques, José
Grilo, Filipe
Santos, José Paulo
Amaro, Pedro
dc.subject.por.fl_str_mv atomic data
atomic processes
line: formation
methods: laboratory: atomic
plasmas
X-rays: general
Astronomy and Astrophysics
Space and Planetary Science
topic atomic data
atomic processes
line: formation
methods: laboratory: atomic
plasmas
X-rays: general
Astronomy and Astrophysics
Space and Planetary Science
description Deutsche Forschungsgemeinschaft (DFG) Project No. 266229290.
publishDate 2019
dc.date.none.fl_str_mv 2019-12-17T23:30:53Z
2019-08-20
2019-08-20T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/90034
url http://hdl.handle.net/10362/90034
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0004-637X
PURE: 15239925
https://doi.org/10.3847/1538-4357/ab2896
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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