Institution: | 1. Radiation Safety Directorate, Partizanski odredi 143, P.O. Box 22, 1020 Skopje, Macedonia;2. Institute of Physics, Faculty of Natural Sciences and Mathematics, Ss Cyril and Methodius University, P.O. Box 162, 1001 Skopje, Macedonia;3. Departamento de Fisica, Universidade Estadual de Maringá, Avenida Colombo 5790, Maringá, 87020-900, PR, Brazil |