1. Dmytro Motornyi Tavria State Agrotechnological University,Department of Higher Mathematics and Physics,Melitopol,Ukraine
2. Institute of Radiation Problems of the Azerbaijan National Academy of Sciences,Baky,Azerbaijan
3. Institute of Applied Physics National Academy of Sciences of Ukraine,Sumy,Ukraine
4. V. Lashkaryov Institute of Semiconductor Physics National Academy of Sciences of Ukraine,Kyiv,Ukraine
5. Berdyansk State Pedagogical University,Department of Physics and Methods of Teaching Physics,Berdyansk,Ukraine