The radiation-stimulated pulse conductivity of CsBr crystals is investigate
d upon picosecond excitation with electron beams (0.2 MeV, 50 ps, 0.1-10 kA
/cm(2) ). The time resolution of the measuring technique is similar to 150
ps. It is shown that the lifetime of conduction band electrons is limited b
y their bimolecular recombination with autolocalized holes (V-k centers). A
delay in the conduction current pulse build-up is revealed. This effect is
explained within the proposed model, according to which the Auger recombin
ation of valence band electrons and holes of the upper core band substantia
lly contributes to the generation of conduction band electrons. (C) 2001 MA
IK "Nauka/Interperiodica".