Abstract

The Monte Carlo method is used for the description of particle (n,p,α) evaporation and γ-ray emission after fusion reactions. The theoretical description focusses on the competition between collective and statistical γ-rays. It is shown that the correct side feeding pattern in final rare earth nuclei can be quantitatively understood if strong collective E2 transitions are taken into account also in bands high above the yrast line. The γ-cascades run through an irregular mixture of statistical and collective transitions before hitting the yrast line. Side feeding patterns, γ-multiplicities and their fluctuations are described in good agreement with the data of the 150Nd( 16O, 4n) 162Er and 148Nd( 18O, 4n) 162Er reactions at different bombarding energies using the computer program “Icarus” established according to these ideas.

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