  Evaporation residue cross-sections are calculated in a dynamical description
of nuclear fission in the framework of the Langevin equation coupled with
statistical evporation of light particles. A theoretical model of one-body
nuclear friction which was developed earlier, namely the chaos-weighted wall
formula, is used in this calculation for the 224Th nucleus. The evaporation
residue cross-section is found to be very sensitive to the choice of nuclear
friction. The present results indicate that the chaotic nature of the
single-particle dynamics within the nuclear volume may provide an explanation
for the strong shape-dependence of nuclear friction which is usually required
to fit experimental data.
