Transmission of X and γ-rays to differentiate tumbaga from gold and gilded copper

Roberto Cesareo, Jan Iwanczyk, Angel Bustamante, Marcelino Dos Anjos, Joaquim T. de Assis, Soraia Azeredo, Ricardo T. Lopes

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

2 Citas (Scopus)


© 2020 Elsevier B.V. In many cases, the differentiation between an artefact on gold alloy, or on tumbaga (the last being a poor gold alloy subject to depletion gilding), and, sometimes, on gilded copper, is not easy. Their aspect is often similar, and energy-dispersive X-ray fluorescence analysis, which is one of the few non-destructive and non-invasive technique suited to analyze gold sheets, is sometimes not able to solve the question on the basis of altered Au-L, Cu-K, Cu-K/Au-L- ratios, as in other similar cases. For that reason, X-rays from a Sn secondary target, and 26.4 and 59.6 keV γ-rays emitted by an Am-241 radioactive source were employed in transmission mode as an additional differentiation method.
Idioma originalInglés estadounidense
PublicaciónMicrochemical Journal
EstadoPublicada - 1 jun. 2020


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