Affiliation: | [1]Institute of Physics, Faculty of Natural Sciences and Mathematics, P.O. Box 162, 1001 Skopje, Macedonia [2]Radiation Safety Directorate, blv. Partizanski Odredi 143, P.O. Box 22, 1020 Skopje, Macedonia [3]Institute of Chemistry, Department of Physical Chemistry, Ss. Cyril and Methodius University, Arhimedova 5, P.O. Box 162, 1000 Skopje, Macedonia |