1. Azerbaijan State Pedagogical University, Baku, AZ-1000, Azerbaijan
2. Institute of Radiation Problems, Azerbaijan National Academy of Sciences, Baku, AZ-1143 Azerbaijan
3. Baku State University, ICRL, AZ-1148, Azerbaijan
4. Joint Institute for Nuclear Research, Dubna 141980, Russia
5. Institute of Solid-State Physics, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
6. Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria