[1] Archaeometry Laboratory, Cultural and Educational Technology Institute (C.E.T.I.), R.C. 'Athena', Tsimiski 58, GR-67100, Xanthi, Greece
[2] Nuclear Physics Laboratory, Physics Department, Aristotle University of Thessaloniki, GR 54124, Thessaloniki, Greece
[3] IŞIK University, Physics Department, Faculty of Science and Arts, 34980-Sile, Istanbul, Turkey