Influence of fission modes on prompt neutron characteristics in the neutron-induced fission of 235UP. Talou
CEA/DEN/DER/SPRC/Laboratoire d'Études de Physique, Cadarache, France
Published online: 21 May 2008
The de-excitation of the fission fragments formed in the neutron-induced fission of 235U, for incident energies from 0.5 to 6.0 MeV, is simulated numerically. Neutrons are emitted sequentially from a Weisskopf spectrum with a temperature set by previous neutron emissions. The complete decay chain is followed until a fission product is formed and no further neutron emission is allowed energetically. Detailed results are obtained, such as the average prompt neutron multiplicity as a function of the fragment mass and the total kinetic energy (A,TKE) and the multiplicity distribution P(ν). An interpretation in terms of fission modes is proposed.
© CEA 2008