1. I.M. Frantsevych Institute for Problems of Material Science, National Academy of Sciences of Ukraine; 3 Krzhizhanovsky str. Kyiv Ukraine
2. Institute of Physics, Polish Academy of Sciences; Al. Lotnikow 32/46 02-668 Warsaw Poland
3. E.O. Paton Electric Welding Institute, National Academy of Sciences of Ukraine; 68 Antonovich str. Kyiv Ukraine