Nuclear dissipation from fission time
GANIL DSM/CEA, IN2P3/CNRS - BP 55027, 14076 Caen Cedex 5,
Accepted: 30 October 2001
Fission times, pre-scission neutron multiplicities and GDR pre-scission γ-ray multiplicities measured for uranium or thorium nuclei formed with temperatures have been compared with calculations performed with CDSM2, a two-dimensional dynamical model combined with a statistical one. Among the three experimental approaches considered, fission times give access to the most precise pieces of information on nuclear dissipation at high excitation energy. A dissipation weaker than the classical one-body dissipation has to be considered to reach an agreement between all the data and the model.
PACS: 24.75.+i – General properties of fission / 24.60.-k – Nuclear reactions: Statistical theory and fluctuations
© EDP Sciences, 2002