Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104174 |
Resumo: | We present results from measurements of Lα x-ray production cross sections of the elements W, Pt, and Au by impact of electrons with energies in the range 10–30 keV. The cross sections were obtained by measuring Lα x-ray intensities emitted from very thin films of the studied elements deposited on thick carbon substrates. The directional and energy spreading of the electron beam within the active film and the x-ray enhancement due to electron backscattering from the substrate were accounted for by means of Monte Carlo simulation. Recorded x-ray intensities were converted to absolute x-ray production cross sections by using two different methods; the first employs measured values of the sample thickness and the number of incident electrons and estimated detector efficiencies; the second is based on a comparison between measured and calculated bremsstrahlung intensities. Experimental data are compared with the results of simple analytical formulas of common use in practical electron probe microanalysis, with calculated cross sections obtained from the distorted-wave Born approximation and with other experimental data available in the literature. |
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Campos, Cristiani SilveiraVasconcellos, Marcos Antonio ZenLlovet Ximenes, XavierSalvat, F.2014-10-04T02:13:31Z20021050-2947http://hdl.handle.net/10183/104174000330857We present results from measurements of Lα x-ray production cross sections of the elements W, Pt, and Au by impact of electrons with energies in the range 10–30 keV. The cross sections were obtained by measuring Lα x-ray intensities emitted from very thin films of the studied elements deposited on thick carbon substrates. The directional and energy spreading of the electron beam within the active film and the x-ray enhancement due to electron backscattering from the substrate were accounted for by means of Monte Carlo simulation. Recorded x-ray intensities were converted to absolute x-ray production cross sections by using two different methods; the first employs measured values of the sample thickness and the number of incident electrons and estimated detector efficiencies; the second is based on a comparison between measured and calculated bremsstrahlung intensities. Experimental data are compared with the results of simple analytical formulas of common use in practical electron probe microanalysis, with calculated cross sections obtained from the distorted-wave Born approximation and with other experimental data available in the literature.application/pdfengPhysical review. A, Atomic, molecular, and optical physics. New York. Vol. 66, no. 1 (July 2002), 012719 9p.OuroPlatinaColisões elétron-átomoSimulação digitalExcitação induzida por impacto de elétronsMétodos de Monte CarloTungstênioProdução de raios xMeasurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electronsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000330857.pdf000330857.pdfTexto completo (inglês)application/pdf102891http://www.lume.ufrgs.br/bitstream/10183/104174/1/000330857.pdfb26c6c403c1771262c6f6a296d2f77c2MD51TEXT000330857.pdf.txt000330857.pdf.txtExtracted Texttext/plain40187http://www.lume.ufrgs.br/bitstream/10183/104174/2/000330857.pdf.txte4fb18ecda9d316434081adc9344b103MD52THUMBNAIL000330857.pdf.jpg000330857.pdf.jpgGenerated Thumbnailimage/jpeg1949http://www.lume.ufrgs.br/bitstream/10183/104174/3/000330857.pdf.jpgdedda8d8cd03eb50b151708c557eb614MD5310183/1041742018-10-08 09:00:25.628oai:www.lume.ufrgs.br:10183/104174Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-08T12:00:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
title |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
spellingShingle |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons Campos, Cristiani Silveira Ouro Platina Colisões elétron-átomo Simulação digital Excitação induzida por impacto de elétrons Métodos de Monte Carlo Tungstênio Produção de raios x |
title_short |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
title_full |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
title_fullStr |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
title_full_unstemmed |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
title_sort |
Measurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electrons |
author |
Campos, Cristiani Silveira |
author_facet |
Campos, Cristiani Silveira Vasconcellos, Marcos Antonio Zen Llovet Ximenes, Xavier Salvat, F. |
author_role |
author |
author2 |
Vasconcellos, Marcos Antonio Zen Llovet Ximenes, Xavier Salvat, F. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Campos, Cristiani Silveira Vasconcellos, Marcos Antonio Zen Llovet Ximenes, Xavier Salvat, F. |
dc.subject.por.fl_str_mv |
Ouro Platina Colisões elétron-átomo Simulação digital Excitação induzida por impacto de elétrons Métodos de Monte Carlo Tungstênio Produção de raios x |
topic |
Ouro Platina Colisões elétron-átomo Simulação digital Excitação induzida por impacto de elétrons Métodos de Monte Carlo Tungstênio Produção de raios x |
description |
We present results from measurements of Lα x-ray production cross sections of the elements W, Pt, and Au by impact of electrons with energies in the range 10–30 keV. The cross sections were obtained by measuring Lα x-ray intensities emitted from very thin films of the studied elements deposited on thick carbon substrates. The directional and energy spreading of the electron beam within the active film and the x-ray enhancement due to electron backscattering from the substrate were accounted for by means of Monte Carlo simulation. Recorded x-ray intensities were converted to absolute x-ray production cross sections by using two different methods; the first employs measured values of the sample thickness and the number of incident electrons and estimated detector efficiencies; the second is based on a comparison between measured and calculated bremsstrahlung intensities. Experimental data are compared with the results of simple analytical formulas of common use in practical electron probe microanalysis, with calculated cross sections obtained from the distorted-wave Born approximation and with other experimental data available in the literature. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-10-04T02:13:31Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/104174 |
dc.identifier.issn.pt_BR.fl_str_mv |
1050-2947 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000330857 |
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1050-2947 000330857 |
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http://hdl.handle.net/10183/104174 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. A, Atomic, molecular, and optical physics. New York. Vol. 66, no. 1 (July 2002), 012719 9p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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