Excitation-energy sorting in superfluid fission dynamics
CENBG, CNRS/IN2P3, Chemin du Solarium, BP. 120, 33175 Gradignan, France
It is now well established that at moderate excitation energies the nucleus temperature does not vary with increasing excitation energy. We show that, as a consequence, two nuclei with different temperatures brought into contact show a rather surprising energy-sorting mechanism where the hotter nucleus transfers all its excitation energy to the colder one. The scission configuration of the fission process offers a unique possibility to observe this phenomenon. The energy-sorting mechanism is clearly reflected by the mean number of prompt neutrons as a function of the fragment mass and by the dependence of the local even-odd effect with mass asymmetry.
© Owned by the authors, published by EDP Sciences, 2010