Evaporation residue cross-sections as a probe for nuclear dissipation in the fission channel of a hot rotating nucleus
Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700 064, Kolkata, India
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Evaporation residue cross-sections are calculated in a dynamical description of nuclear fission in the framework of the Langevin equation coupled with statistical evaporation 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.
© Società Italiana di Fisica and Springer-Verlag, 2003