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Heritage Science
Fig. 5 | Heritage Science

Fig. 5

From: The non-destructive investigation of a late antique knob bow fibula (Bügelknopffibel) from Kaiseraugst/CH using Muon Induced X-ray Emission (MIXE)

Fig. 5

The prompt muonic X-ray (\(\mu\)-X ray) spectrum from the knob bow fibula, at position 1, in different energy ranges: a 100–600  keV, b 600–1200 keV, c 1200–2200 keV, d 2200–3000 keV and e 3000–6100 keV. The \(\mu\)-X rays of copper (Cu), zinc (Zn), tin (Sn) and lead (Pb) are shown in brown, blue, green and purple colors, respectively. The insets in (b), (c) and (d) show the delayed spectrum, which consists of only the gamma rays from \(^{60-62,64}\)Ni (nickle) and \(^{60}\)Co (cobalt), as a result of the the capture of muons by the Cu nucleus. These are also marked in brown color. The rest of the contaminants peaks are shown in red

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