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

doi:10.1016/j.microc.2020.104720

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

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

© 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.

Original language	American English
Journal	Microchemical Journal
DOIs	https://doi.org/10.1016/j.microc.2020.104720
State	Published - 1 Jun 2020

Access to Document

10.1016/j.microc.2020.104720

Cite this

@article{af5f4328796c41498cf52cc8e7ac2c0b,

title = "Transmission of X and γ-rays to differentiate tumbaga from gold and gilded copper",

abstract = "{\textcopyright} 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.",

author = "Roberto Cesareo and Jan Iwanczyk and Angel Bustamante and Anjos, {Marcelino Dos} and {de Assis}, {Joaquim T.} and Soraia Azeredo and Lopes, {Ricardo T.}",

year = "2020",

month = jun,

day = "1",

doi = "10.1016/j.microc.2020.104720",

language = "American English",

journal = "Microchemical Journal",

issn = "0026-265X",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Transmission of X and γ-rays to differentiate tumbaga from gold and gilded copper

AU - Cesareo, Roberto

AU - Iwanczyk, Jan

AU - Bustamante, Angel

AU - Anjos, Marcelino Dos

AU - de Assis, Joaquim T.

AU - Azeredo, Soraia

AU - Lopes, Ricardo T.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - © 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.

AB - © 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.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85079862052&origin=inward

UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85079862052&origin=inward

U2 - 10.1016/j.microc.2020.104720

DO - 10.1016/j.microc.2020.104720

M3 - Article

SN - 0026-265X

JO - Microchemical Journal

JF - Microchemical Journal

ER -

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this