Formation of an Effective Electric Field
in Track Regions During the Stopping
of Fast Heavy Charged Particles in Materials

E. V. Metelkin* and A. I. Ryazanov**

Kurchatov Institute Russian Research Centre, Moscow, 123182 Russia

*e-mail: e.v.metelkin@mtu-net.ru

**e-mail: ryazanov@cityline.ru

Received July 1, 1999

Abstract—A microscopic approach is used to study the formation of an electric field near the trajectories of
fast heavy charged particles propagating in various materials. The analysis is based on determining the space–time
distribution function of the fast -electrons generated when heavy ions are stopped in materials and the electric cur-
rent produced by them. The spatial dependence of the electric field strength is determined at various times. The
results are used to analyze the process of electric field energy transfer to the ionic subsystem. The spatial dis-
tribution of the energy acquired by the ionic subsystem from the electric field is determined over its character-
istic lifetime. A mechanism is proposed to explain the formation of track regions both as a result of the higher
local heating of the ionic subsystem and as a result of the possible irreversible displacement of the atoms from
nodal points. © 2000 MAIK “Nauka/Interperiodica”.

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