Analysis of XX century gold-silver coins by X-ray fluorescence and neutron tomography

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dc.contributor.authorZAMBONI, C.B.pt_BR
dc.contributor.authorSTANOJEV, M.pt_BR
dc.contributor.authorKOKA, A.C.S.S.pt_BR
dc.contributor.authorGIOVANNI, D.N.S.pt_BR
dc.contributor.authorREDÍGOLO, M.M.pt_BR
dc.coverageNacionalpt_BR
dc.creator.eventoENCONTRO DE PRIMAVERA DA SOCIEDADE BRASILEIRA DE FÍSICA, 2.; REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 45.; ENCONTRO NACIONAL DE FÍSICA DE PARTÍCULAS E CAMPOS, 42.; RENAFAE WORKSHOPpt_BR
dc.date.accessioned2023-01-24T18:01:36Z
dc.date.available2023-01-24T18:01:36Z
dc.date.evento26-29 de setembro, 2022pt_BR
dc.description.abstractX-ray fluorescence (XRF) is a technique capable of analyzing chemical elements on metallic surfaces, providing fast, sensitive, and reliable results while neutron tomography (NT) allows to investigate its internal structure by three-dimensional images. Both techniques are powerful tools for non-destructive analysis of artistic and historical objects. In this study, we explored the combined use of these techniques to investigate a set of Brazilian gold-silver coins dating from the early 20th century (1913-1938). This set of coins was select due to the lack of data related to their composition and origin. These data provide information to museologists for better cataloging / registration of fundamental information. Moreover, this information is vital for collectors and marchands in authentication processes. The X-Ray Fluorescence analysis was performed using X-Ray Spectrometer with gold (Au) and silver (Ag) targets. The excitation conditions were optimized in 30 kV and 5 μA and counting time of 200 s. A NT facility is installed at the beam-hole (BH-14) of the 4.5 MW pool-type IEA-R1 nuclear research reactor at IPEN (SP, Brazil). It consists of a 6LiF (ZnS) scintillator screen, a glass-based plane mirror, a video camera (16bit, 1024 x1024 pixels, cooled CCD) and a collimator to reduce the neutron beam size in the BH-14. The experimental conditions established were: 8 x106 ns-1 cm-2 (neutron flux), irradiation time/image of 1s, spatial resolution of 263 ± 35 μ and time tomography of 400s. The three-dimensional images were treated using dedicated software (OctopusV8.0 and VG studio Max2.2). The combined results bring information of elemental composition and 3D images highlight the conservation state of the pieces, being of great aid to conservators and museologists.pt_BR
dc.event.siglaEPSBF; RTFNB; ENFPCpt_BR
dc.identifier.citationZAMBONI, C.B.; STANOJEV, M.; KOKA, A.C.S.S.; GIOVANNI, D.N.S.; REDÍGOLO, M.M. Analysis of XX century gold-silver coins by X-ray fluorescence and neutron tomography. In: ENCONTRO DE PRIMAVERA DA SOCIEDADE BRASILEIRA DE FÍSICA, 2.; REUNIÃO DE TRABALHO SOBRE FÍSICA NUCLEAR NO BRASIL, 45.; ENCONTRO NACIONAL DE FÍSICA DE PARTÍCULAS E CAMPOS, 42.; RENAFAE WORKSHOP, 26-29 de setembro, 2022, Natal, RN. <b>Resumo...</b> São Paulo, SP: Sociedade Brasileira de Física, 2022. Disponível em: http://repositorio.ipen.br/handle/123456789/33658.
dc.identifier.orcid0000-0002-9283-6192pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7766-2692
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/33658
dc.localSão Paulo, SPpt_BR
dc.local.eventoNatal, RNpt_BR
dc.publisherSociedade Brasileira de Físicapt_BR
dc.rightsopenAccesspt_BR
dc.titleAnalysis of XX century gold-silver coins by X-ray fluorescence and neutron tomographypt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorANA CATARINA KOKA DE SOUZA SILVA
ipen.autorMARCELO MIYADA REDÍGOLO
ipen.autorDALTON GIOVANNI NOGUEIRA DA SILVA
ipen.autorMARCO ANTONIO STANOJEV PEREIRA
ipen.autorCIBELE BUGNO ZAMBONI
ipen.codigoautor15467
ipen.codigoautor5976
ipen.codigoautor13948
ipen.codigoautor2133
ipen.codigoautor267
ipen.contributor.ipenauthorANA CATARINA KOKA DE SOUZA SILVA
ipen.contributor.ipenauthorMARCELO MIYADA REDÍGOLO
ipen.contributor.ipenauthorDALTON GIOVANNI NOGUEIRA DA SILVA
ipen.contributor.ipenauthorMARCO ANTONIO STANOJEV PEREIRA
ipen.contributor.ipenauthorCIBELE BUGNO ZAMBONI
ipen.date.recebimento23-01
ipen.event.datapadronizada2022pt_BR
ipen.identifier.ipendoc29292pt_BR
ipen.notas.internasResumopt_BR
ipen.type.genreResumo
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relation.isAuthorOfPublicationbc63fe9c-45a3-4902-9c00-76b77f4a74d2
relation.isAuthorOfPublication0192edfe-c986-47f3-a384-7dd4093ff566
relation.isAuthorOfPublication563d95e5-227e-456d-a1d7-4bb051ae51ba
relation.isAuthorOfPublication.latestForDiscovery563d95e5-227e-456d-a1d7-4bb051ae51ba
sigepi.autor.atividadeREDÍGOLO, M.M.:5976:730:Npt_BR
sigepi.autor.atividadeGIOVANNI, D.N.S.:13948:310:Npt_BR
sigepi.autor.atividadeKOKA, A.C.S.S.:15467:310:Npt_BR
sigepi.autor.atividadeSTANOJEV, M.:2133:310:Npt_BR
sigepi.autor.atividadeZAMBONI, C.B.:267:310:Spt_BR
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