1. Environmental Radioactivity Laboratory, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research “Demokritos”, Agia Paraskevi, Attiki, Greece + Nuclear Engineering Department, National Technical U
2. Environmental Radioactivity Laboratory, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research “Demokritos”, Agia Paraskevi, Attiki, Greece
3. Nuclear Engineering Department, National Technical University of Athens, Athens, Greece