Kalinichenko O. Radiation-acoustic effects at interaction of penetrating radiation particles with solid

Object: solid-state objects at interaction with a beam of particles or separate particles of penetrating radiation. The purpose: determination of laws of acoustic oscillations excitation at interaction of solid body with beams of penetrating radiation and with single particles - heavy ions and neutrons and determination of influence of excited oscillations on the processes of structurization, transport and fracture in the irradiated solid body. Methods: the traditional and approved methods of mathematical physics for research of radiation-acoustic effects, the equations of theoretical physics including solid state physics, acoustics, the theory of elasticity and physics of radiation-matter interaction, methods of computer simulation. Results: it is shown, that the amplitude of the acoustic signal from ensemble of microradiators, arising at interaction of particles of radiation with substance is the sum of two components, connected, accordingly, with long-term and short-term change of volume of the microradiator. Presence of a not-thermal additive in the acoustic impulse excited at pulse radiolysis with recombination of its products that corresponds to experimental data is shown. By example of gadolinium target, the transformation of the form of the impulse excited by a radiation beam at changing of target temperature near to zero of Gr?neisen parameter is described and experimentally confirmed. Field of application: physics of solid state, acoustics, radiation physics