Interaction of radiation and plasma with matter

In the field of nuclear tracks new methods for detection of charged particles were developed and applied in the study of the passage of accelerated ions through solid matter and for the radiographic determination of the boron content in mice organs. Interaction of 200Mev/n 12 C beam with Lucite and water was studied and the total changing reaction cross sections and elemental cross sections for producing fragments with atomic numbers from 3 to 5 was measured. A cluster radioactivity of the 242Cm ?34Si + 208 Pb reaction was started. The research of structural changes in semiconductors involved implantation of Si, Ge and GaAs samples with heavy ions which created isolated amorphous zones in the crystalline structure of semiconductors. Recrystallization of these zones was subsequently induced with electron irradiation and the evolution of implant damage was recorded by using a Transmission Electron Microscope (TEM). In the area of plasma physics temporal development of the electron distribution function after the application of a positive voltage step to a planar electrode immersed in a weakly magnetised discharge plasma column was investigated experimentally. The electron distribution function was measured by a one-sided plane Langmuir probe in the experimental conditions when the firerod can be created and also in the conditions when the firerod can not be created because either the pressure or the amplitude of the voltage step are to low. The phenomena of the decoherence, which is of the fundamental importance for the understanding of quantum mechanics as well as for future research work in the field of quantum computer, was studied.