Final excitation energy of fission fragments

Details Final excitation energy of fission fragments Final excitation energy of fission fragments

2011-04-14

arxiv.org/abs/1104.2774v1

Phys.Rev.C83:061601,2011

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 3 figures

Scientific paper

10.1103/PhysRevC.83.061601

We study how the excitation energy of the fully accelerated fission fragments is built up. It is stressed that only the intrinsic excitation energy available before scission can be exchanged between the fission fragments to achieve thermal equilibrium. This is in contradiction with most models used to calculate prompt neutron emission where it is assumed that the total excitation energy of the final fragments is shared between the fragments by the condition of equal temperatures. We also study the intrinsic excitation-energy partition according to a level density description with a transition from a constant-temperature regime to a Fermi-gas regime. Complete or partial excitation-energy sorting is found at energies well above the transition energy.

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