Patochkina, О. L., National Science Center «Kharkov Institute Of Physics And Technology» The National Academy of Science of Ukraine 61108, Kharkov, Akademicheskaya str., 1, phone/fax 8-057-335-08-47«The A.N. Podgorny Institute for Mechanical Engineering Problems» The National Academy of Science of Ukraine61046, Kharkov, Dmitriy Pozharskiy str., 2/10, phone/fax 8-057-294-46-35, Ukraine