Non-destructive measurements for characterisation of materials and datation of Corona Ferrea of Monza

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dc.contributor.authorMilazzo, Men_AU
dc.contributor.authorCicardi, Cen_AU
dc.contributor.authorMannoni, Ten_AU
dc.contributor.authorTuniz, Cen_AU
dc.date.accessioned2025-04-11T05:13:18Zen_AU
dc.date.available2025-04-11T05:13:18Zen_AU
dc.date.issued1997-02-10en_AU
dc.date.statistics2025-03-28en_AU
dc.description.abstractNon-destructive analyses of Corona Ferrea of Monza, a late Roman or Longobard origin, were performed using energy dispersive-XRF portable instrumentation. To irradiate the internal surfaces of the six gold plates which make up the Crown we employed the radioactive isotope americium-241 as the x-radiation source, while to probe the other parts (approximately 200 separate points were studied) we used various types of x-ray tubes equipped with glass capillary to focus the x-rays on single small spots were used. It was not possible to use monochromatic exciting radiation when analysing the Monza Crown; furthermore, none of its surfaces proved to be flat. This meant that the secondary, concentration-dependent x-ray emission from copper could not be calculated, neither was it possible to calculate the influence of surface irregularities on x- ray intensity. We overcame these difficulties by a method that involved calculating the ratios: copper line intensity to gold line intensity (ICu/IAu) and silver line intensity to gold line intensity (IAg/Au). We then compared these ratios to the same ratios determined in standard samples of gold alloy whose compositions were accurately known and similar to that of the Crown. In this way the secondary excitation effect of copper was allowed for. The method depends upon the ratio of the intensities of two x-ray emission lines from a metal alloy being relatively insensitive to the geometry of irradiation. © The Authors.en_AU
dc.identifier.booktitleSixth Australasian Archaeometry Conference : "Australasian Archaeometry: retrospectives for the new millenium", Australian Museum, Sydney, 10-13 February 1997en_AU
dc.identifier.citationMilazzo, M., Cicardi, C., Mannoni, T., & Tuniz, C. (1997). Non-destructive measurements for characterisation of materials and datation of Corona Ferrea of Monza. Paper presented to the Sixth Australasian Archaeometry Conference, Sydney, NSW, Australia, 10-13 February, 1997, (pp. 74-75.). In Sixth Australasian Archaeometry Conference : "Australasian Archaeometry: retrospectives for the new millenium", Australian Museum, Sydney, 10-13 February 1997. Lucas Heights, Australia : AINSE.en_AU
dc.identifier.conferenceenddate1997-02-13en_AU
dc.identifier.conferencenameSixth Australasian archaeometry conferenceen_AU
dc.identifier.conferenceplaceSydneyen_AU
dc.identifier.conferencestartdate1997-02-10en_AU
dc.identifier.pagination74-74en_AU
dc.identifier.placeofpublicationLucas Heights, Australiaen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16140en_AU
dc.language.isoenen_AU
dc.publisherAINSEen_AU
dc.subjectAcceleratorsen_AU
dc.subjectAge estimationen_AU
dc.subjectAmericium 241en_AU
dc.subjectAntares Tandem Acceleratoren_AU
dc.subjectCarbon 14en_AU
dc.subjectCopperen_AU
dc.subjectCultural objectsen_AU
dc.subjectEnamelsen_AU
dc.subjectGlassen_AU
dc.subjectGolden_AU
dc.subjectItalyen_AU
dc.subjectNondestructive analysisen_AU
dc.subjectRubidiumen_AU
dc.subjectSilveren_AU
dc.subjectX-ray fluorescence analysisen_AU
dc.titleNon-destructive measurements for characterisation of materials and datation of Corona Ferrea of Monzaen_AU
dc.typeConference Paperen_AU
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