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dc.contributor.authorCampos, Cristiani Silveirapt_BR
dc.contributor.authorVasconcellos, Marcos Antonio Zenpt_BR
dc.contributor.authorLlovet Ximenes, Xavierpt_BR
dc.contributor.authorSalvat, F.pt_BR
dc.date.accessioned2014-10-04T02:13:31Zpt_BR
dc.date.issued2002pt_BR
dc.identifier.issn1050-2947pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/104174pt_BR
dc.description.abstractWe 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.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. A, Atomic, molecular, and optical physics. New York. Vol. 66, no. 1 (July 2002), 012719 9p.pt_BR
dc.rightsOpen Accessen
dc.subjectOuropt_BR
dc.subjectPlatinapt_BR
dc.subjectColisões elétron-átomopt_BR
dc.subjectSimulação digitalpt_BR
dc.subjectExcitação induzida por impacto de elétronspt_BR
dc.subjectMétodos de Monte Carlopt_BR
dc.subjectTungstêniopt_BR
dc.subjectProdução de raios xpt_BR
dc.titleMeasurements of L-shell x-ray production cross sections of W, Pt, and Au by 10-30-keV electronspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000330857pt_BR
dc.type.originEstrangeiropt_BR


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