ENERGY LOSS OF CHARGED PARTICLES IN DENSE PLASMA

Abstract

The stopping power of a dense multicomponent plasma with reference to heavy relativistic charged particles is studied. Calculations of the polarization stopping power of a dense two- and more-component plasma due to the flow of heavy projectile particles with velocities reaching 85% of the speed of light were carried out. Similar conditions are achieved in modern experiments on protonography. In this paper, the stopping power is calculated using a dielectric function with an effective charge that is part of the plasma of ionized ions. The article uses the method of moments, which does needany small parameter. The mathematical basis of the method do not depend on the magnitude of the interparticle interaction potential in an equilibrium plasma, and this approach allows one to determine the dynamic characteristics from the calculated static ones. The latter were found from the solution of the Ornstein-Zernike equation in the hypernetted chain approximation with the aid of the Deutsch potential. It is shown that the role of relativistic corrections in the expression for the stopping power increases with the speed of the decelerating particles.

Keywords: plasma stopping power, method of moment, beryllium multicomponent plasma, effective charge, relativistic particles, Coulomb system, Nevanlinna formula, loss function.