Study of ancient Greek copper coins from Nikopolis (Epirus) and Thessaloniki (Macedonia)Study of ancient Greek copper coins from Nikopolis (Epirus) and Thessaloniki (Macedonia) Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-121993enAncient copper coins from the Greek cities Nikopolis in Epirus and Thessaloniki in Macedonia, minted during Roman imperial times (31 BC to AD 268), were analysed non-destructively by proton induced X-ray emission, after removal of the patina. An intercompar-ison study using different analytical methods was also performed on five coins. Eleven elements were analysed quantitatively on all coins. Statistical analysis of the results was performed for their presentation in the form of dendrograms. Finally, the variations in the concentrations of some individual elements from emperor to emperor were examined.Δημοσίευση σε επιστημονικό περιοδικό http://creativecommons.org/licenses/by/4.0/Archaeometry352265–278 Kallithrakas-Kontos Nikolaos Καλλιθρακας-Κοντος Νικολαος Katsanos Anastasios Κατσανος Αναστασιος Aravantinos A. Oeconomides A. Touratsoglou, Giannēs, 1940- John Wiley and Sons Nikopolis (City) nikopolis greece extinct city nikopolis city Thessaloniki Roman imperial PIXE (Spectrum analysis) X-ray emission, Proton-induced proton induced x ray emission pixe spectrum analysis x ray emission proton induced Coins Copper